Door System, Mirror System & Window System — Buick LaCrosse I (2004-2009)

Fastener Tightening Specifications

Application	Specification
Application	Metric	English
Front Door Body Side Hinge Bolts	33 N.m	24 lb ft
Front Door Inside Door Handle Screw	3 N.m	27 lb in
Front Door Lock Screws	10 N.m	89 lb in
Front Door Lock Striker Screws	20 N.m	15 lb ft
Front Door Outer Belt Sealing Strip Screws	2 N.m	18 lb in
Front Door Side Hinge Bolts	33 N.m	24 lb ft
Front Door Window Channel Retaining Screws	2 N.m	18 lb in
Lower Door Hinge Side Bolts	33 N.m	24 lb ft
Outside Door Handle Bolts	10 N.m	89 lb in
Outside Rearview Mirror Motor Screws	2 N.m	18 lb in
Outside Rearview Mirror Nuts	6 N.m	54 lb in
Pull Cup/Trim Plate Bezel Screws	3 N.m	27 lb in
Pull Handle Trim Retaining Screw	3 N.m	27 lb in
Rear Door Body Side Hinge Bolts	33 N.m	24 lb ft
Rear Door Lock Screws	10 N.m	89 lb in
Rear Door Lock Striker Screw	20 N.m	15 lb ft
Rear Door Outer Belt Sealing Strip Screws	2 N.m	18 lb in
Rear Door Side Hinge Bolts	33 N.m	24 lb ft
Window Regulator Bolts	10 N.m	89 lb in
Window Regulator Motor Bolts	6 N.m	53 lb in
Upper Door Hinge Keeper Bolt	33 N.m	24 lb ft

Fastener Tightening Specifications

Scheme 1

Scheme 1: Power Window Schematics

Scheme 2

Scheme 2: Door Lock/Indicator Schematics

Scheme 3

Scheme 4

Scheme 5

Scheme 5: Outside Mirror Schematics

Scheme 6

Scheme 6: Power Door Systems Component Views

Callout	Component Name
1	Door Frame
2	Outside Rearview Mirror - Driver
3	Door Lock/Window Switch - Driver
4	Outside Rearview Mirror Switch
5	Window Motor - Driver
6	Inflatable Restraint Side Impact Sensor - Left (AY1)
7	Door Lock - Driver

Scheme 7

Callout	Component Name
1	Outside Rearview Mirror - Front Passenger
2	Door Frame
3	Door Lock - Front Passenger
4	Inflatable Restraint Side Impact Sensor - Right (AY1)
5	Door Lock Switch - Front Passenger
6	Window Switch - Front Passenger
7	Window Motor - Front Passenger

Scheme 8

Callout	Component Name
1	Door Frame
2	Window Switch - LR
3	Window Motor - LR
4	Door Lock - LR

Scheme 9

Callout	Component Name
1	Window Switch - RR
2	Door Frame
3	Door Lock - RR
4	Window Motor - RR

Power Door Systems Connector End Views

Door Lock - Driver Connector Part Information OEM: 10768367 Service: 88986248 10-Way F Micro Timer 3 Series Sealed (BK) Pin Wire Color Circuit No. Function 1 - - Not Used 2 TN 694 Driver Door Lock Actuator Unlock Control 3 GY 295 Door Lock Actuator Lock Control 4 L-GN 1123 Door Lock Key Switch Lock Signal 5 - - Not Used 6 GY/BK 745 Left Front Door Ajar Switch Signal 7 TN 126 Left Front Door Open Switch Signal 8 BK 550 Ground 9 PU 1124 Door Lock Key Switch Unlock Signal 10 - - Not Used

Door Lock - Front Passenger Connector Part Information OEM: 10768369 Service: 88986251 6-Way F Micro Timer 3 Series Sealed (BK) Pin Wire Color Circuit No. Function 1 BK/WH 746 Right Front Door Ajar Switch Signal 2 L-GN 1177 Right Front Door Open Switch Signal 3 BK 750 Ground 4 - - Not Used 5 TN 294 Door Lock Actuator Unlock Control 6 GY 295 Door Lock Actuator Lock Control

Door Lock - LR Connector Part Information OEM: 10768369 Service: 88986251 6-Way F Micro Timer 3 Series Sealed (BK) Pin Wire Color Circuit No. Function 1 - - Not Used 2 TN 294 Door Lock Actuator Unlock Control 3 GY 295 Door Lock Actuator Lock Control 4 L-BU/BK 747 Left Rear Door Ajar Switch Signal 5 D-BU/WH 1179 Left Rear Door Open Switch Signal 6 BK 550 Ground

Door Lock - RR Connector Part Information OEM: 10768369 Service: 88986251 6-Way F Micro Timer 3 Series Sealed (BK) Pin Wire Color Circuit No. Function 1 L-GN/BK 748 Right Rear Door Ajar Switch Signal 2 YE/BK 1181 Right Rear Door Open Switch Signal 3 BK 750 Ground 4 - - Not Used 5 TN 294 Door Lock Actuator Unlock Control 6 GY 295 Door Lock Actuator Lock Control

Door Lock Switch - Driver Connector Part Information OEM: 12124997 Service: 12167130 5-Way F Metri-Pack 150 Series Right Angle (BK) Pin Wire Color Circuit No. Function A GY 8 Instrument Panel Lamp Supply Voltage B BK 550 Ground C - - Not Used D RD/BK 780 Driver Door Lock Switch Lock Signal E OG/BK 781 Driver Door Lock Switch Unlock Signal

Door Lock Switch - Front Passenger Connector Part Information OEM: 12124997 Service: 12167130 5-Way F Metri-Pack 150 Series Right Angle (BK) Pin Wire Color Circuit No. Function A GY 8 Instrument Panel Lamp Supply Voltage B BK 750 Ground C - - Not Used D L-BU 244 Passenger Door Lock Switch Lock Signal E D-BU 245 Passenger Door Lock Switch Unlock Signal

Outside Rearview Mirror Motor - Driver Connector Part Information OEM: 15396848 Service: See Catalog 6-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function 1 YE 88 Driver Mirror Motor Up Control 2 L-GN 1499 Driver Mirror Motor Left/Down Control 3 WH 81 Driver Mirror Motor Right Control 4 OG 267 Heated Mirror Element Supply Voltage 5 BK 550 Ground 6 - - Not Used

Outside Rearview Mirror Motor - Passenger Connector Part Information OEM: 15396848 Service: See Catalog 6-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function 1 BN/WH 1498 Passenger Mirror Motor Up Control 2 L-BU/WH 1497 Passenger Mirror Motor Left/Down Control 3 RD/WH 881 Passenger Mirror Motor Right Control 4 OG 267 Heated Mirror Element Supply Voltage 5 BK 750 Ground 6 - - Not Used

Outside Rearview Mirror Switch Connector Part Information OEM: 12064769 Service: 12101762 10-Way F Metri-Pack 150 Series (NA) Pin Wire Color Circuit No. Function A - - Not Used B BK 550 Ground C L-BU/WH 1497 Passenger Mirror Motor Left/Down Control D WH 81 Driver Mirror Motor Right Control E GY 8 Instrument Panel Lamp Supply Voltage F YE 88 Driver Mirror Motor Up Control G OG 840 Battery Positive Voltage H L-GN 1499 Driver Mirror Motor Left/Down Control J RD/WH 881 Passenger Mirror Motor Right Control K BN/WH 1498 Passenger Mirror Motor Up Control

Window Motor - Driver Connector Part Information OEM: 12129487 Service: 12129487 2-Way F Metri-Pack 280 Series Flexlock Sealed (GY) Pin Wire Color Circuit No. Function A D-BU 164 Power Window Motor Left Front Up Control B BN 165 Power Window Motor Left Front Down Control

Window Motor - Front Passenger Connector Part Information OEM: 12129487 Service: 12129487 2-Way F Metri-Pack 280 Series Flexlock Sealed (GY) Pin Wire Color Circuit No. Function A D-BU 666 Power Window Motor Right Front Up Control B BN 667 Power Window Motor Right Front Down Control

Window Motor - LR Connector Part Information OEM: 12129487 Service: 12129487 2-Way F Metri-Pack 280 Series Flexlock Sealed (GY) Pin Wire Color Circuit No. Function A D-BU 668 Power Window Motor Left Rear Up Control B BN 669 Power Window Motor Left Rear Down Control

Window Motor - RR Connector Part Information OEM: 12129487 Service: 12129487 2-Way F Metri-Pack 280 Series Flexlock Sealed (GY) Pin Wire Color Circuit No. Function A D-BU 670 Power Window Motor Right Rear Up Control B BN 671 Power Window Motor Right Rear Down Control

Window Switch - Driver C1 Connector Part Information OEM: 15326900 Service: 15306380 6-Way F GT 280 Series (BK) Pin Wire Color Circuit No. Function A BN 165 Power Window Motor Left Front Down Control B L-BU 166 Power Window Master Switch Right Front Up Signal C TN 167 Power Window Master Switch Right Front Down Signal D - - Not Used E D-BU 164 Power Window Motor Left Front Up Control F GY 8 Instrument Panel Lamp Supply Voltage

Window Switch - Driver C2 Connector Part Information OEM: 15326924 Service: See Catalog 8-Way F GT 280 Series (BK) Pin Wire Color Circuit No. Function A - - Not Used B BK 550 Ground C PU 169 Power Window Master Switch Left Rear Down Signal D D-GN 168 Power Window Master Switch Left Rear Up Signal E YE 143 Accessory Voltage F D-BU 1307 Power Window Master Switch Lockout Signal G L-GN 170 Power Window Master Switch Right Rear Up Signal H PU 171 Power Window Master Switch Right Rear Down Signal

Window Switch - Front Passenger Connector Part Information OEM: 12191825 Service: 15306048 8-Way GT 280 Series (BN) Pin Wire Color Circuit No. Function A YE 143 Accessory Voltage B GY 8 Instrument Panel Lamp Supply Voltage GY 8 Instrument Panel Lamp Supply Voltage C BK 750 Ground D TN 167 Power Window Master Switch Right Front Down Signal E - - Not Used F BN 667 Power Window Motor Right Front Down Control G D-BU 666 Power Window Motor Right Front Up Control H L-BU 166 Power Window Master Switch Right Front Up Signal

Window Switch - LR Connector Part Information OEM: 12064998 Service: 15306189 8-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A BN 669 Power Window Motor Left Rear Down Control B - - Not Used C D-GN 168 Power Window Master Switch Left Rear Up Signal D D-BU 668 Power Window Motor Left Rear Up Control E D-BU 1307 Power Window Master Switch Lockout Signal F-G - - Not Used H PU 169 Power Window Master Switch Left Rear Down Signal

Window Switch - RR Connector Part Information OEM: 12064998 Service: 15306189 8-Way F Metri-Pack 280 Series (BK) Pin Wire Color Circuit No. Function A BN 671 Power Window Motor Right Rear Down Control B - - Not Used C L-GN 170 Power Window Master Switch Right Rear Up Signal D D-BU 670 Power Window Motor Right Rear Up Control E D-BU 1307 Power Window Master Switch Lockout Signal F-G - - Not Used H PU 171 Power Window Master Switch Right Rear Down Signal

Diagnostic Starting Point - Doors

Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information

The identification of the control modules which command the system
The ability of the control modules to communicate through the Serial Data circuit
The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

Scan Tool Output Control	Additional Menu Selection(s)	Description
Lock All Doors	Door Lock Test	The BCM momentarily pulses all of the door lock motors. All doors should lock when ON is selected.
Driver Door Unlock	Door Lock Test	The BCM momentarily pulses only the driver door lock motor. The driver door should unlock when ON is selected.
Passenger Door Unlock	Door Lock Test	The BCM momentarily pulses all of the passenger door lock motors. All passenger doors should unlock when ON is selected.

Scan Tool Output Controls

Scan Tool Data List

Scan Tool Parameter	Data List	Units Displayed	Typical Data Value
Battery power is the only requirement for Data, Inputs, Module Information and Lock Outputs.
Base Model Part Number	Module Information 1	Number	Varies
All Door Lock Motors	Outputs	OFF/ON	OFF
Battery Voltage	Data	9.0 -16.0 Volts	12.8 Volts
Driver Door Unlock Motors	Outputs	OFF/ON	OFF
Left Rear Door Ajar Sw.	Inputs	Closed/Ajar	Closed
LF Door Ajar Switch	Inputs	Door Closed/Ajar	Door Closed
LF Door Lock Switch	Inputs	Idle/Lock/Unlock/Invalid	Idle
LF Door Open Switch	Inputs	Closed/Open	Closed
LF Key Cylinder Lock Switch	Inputs	Idle/Lock/Unlock/Invalid	Idle
LR Door Open Switch	Inputs	Closed/Open	Closed
Passenger Door Unlock Motors	Outputs	OFF/ON	OFF
RF Door Ajar Switch	Inputs	Door Closed/Ajar	Door Closed
RF Door Lock Switch	Inputs	Idle/Lock/Unlock/Invalid	Idle
RF Door Open Switch	Inputs	Closed/Open	Closed
RF Key Cylinder Lock Switch	Inputs	Idle/Lock/Unlock/Invalid	Idle
Right Rear Door Ajar Sw.	Inputs	Closed/Ajar	Closed
RR Door Open Sw.	Inputs	Closed/Open	Closed

Body Control Module (BCM)

Symptoms - Doors

IMPORTANT

The following steps must be completed before using the symptom tables.

Perform the «Diagnostic System Check - Vehicle»(/buick/lacrosse/i-2004-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information, before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions: Refer to «Power Windows Description and Operation»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) . Refer to «Power Door Locks Description and Operation»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) . Refer to «Door Ajar Indicator Description and Operation»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) . Refer to «Outside Mirror Description and Operation»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the door systems. Refer to «Checking Aftermarket Accessories»(/buick/lacrosse/i-2004-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) .
Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

«Power Windows Inoperative - One or Both Rear Windows»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-windows-inoperative-one-or)
«Power Windows Inoperative - All»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system)
«Power Windows Inoperative - Express Down Function»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-windows-inoperative-express-down)
«Power Windows Inoperative - Lockout Function»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system)
«Power Window Inoperative - Driver Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-window-inoperative-driver-door)
«Power Window Inoperative - Passenger Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-window-inoperative-passenger-door)
«Door Ajar Indicator Malfunction»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__door-ajar-indicator-malfunction)
«Power Door Locks Inoperative - All Doors and Switches»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system)
«Power Door Locks Inoperative - Key Cylinder Switches»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-door-locks-inoperative-key)
«Power Door Lock Inoperative - Driver Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-door-lock-inoperative-driver)
«Power Door Locks Inoperative - Passenger Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__power-door-locks-inoperative-passenger)
«Automatic Door Locks Inoperative»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system)
«Power Mirrors Inoperative»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system)
«Heated Mirrors Inoperative»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__heated-mirrors-inoperative)

Test Description

The number below refers to the step number on the diagnostic table.

6: This step ensures that the power window master switch lockout signal circuit is not the cause of the malfunction. This circuit supplies battery positive voltage, through the rear window lockout switch, to the rear window switches and is used to enable or disable the rear window lockout feature. When the rear window lockout feature is enabled, the circuit is open and no voltage is supplied to the rear window switches. When the feature is not enabled, the circuit is connected to battery positive voltage. If this circuit is shorted to ground when the lockout feature is not enabled, the PWR WDO circuit breaker may cycle continuously OFF/ON until, either the lockout switch is pressed to open the circuit or the circuit breaker is permanently damaged. All windows may be partially or totally inoperative while the fault is present.

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Are all the power windows inoperative?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Disconnect the driver window switch C2 harness connector. Turn ON the ignition, with the engine OFF. Probe the power window switch voltage supply circuit of the harness connector with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 4	Go to Step 5
4	Connect the test lamp between the power window switch voltage supply circuit and the ground circuit of the harness connector. Does the test lamp illuminate?	Go to Step 6	Go to Step 8
5	Test for an open or a short to ground in the power window switch voltage supply circuits of the driver window and front passenger window switches. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 11	Go to Step 10
6	Test the power window master switch lockout signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 11	Go to Step 7
7	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 11	Go to Step 9
8	Repair the open in the ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 11
9	Replace the driver window switch. Refer to Power Window Switch Replacement . Did you complete the replacement?	Go to Step 11
10	Replace the PWR WDO circuit breaker. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) . Did you complete the repair?	Go to Step 11
11	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Windows Inoperative - All

Power Windows Inoperative - One or Both Rear Windows

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Verify that the rear power window fault is present. Do both of the rear power windows operate normally?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Are both rear windows inoperative?	Go to Step 4	Go to Step 5
4	Test for a poor connection or an open in the lockout signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 12
5	Disconnect the inoperative window switch. Turn ON the ignition, with the engine OFF. Probe the lockout signal circuit of the inoperative window switch with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 6	Go to Step 4
6	Connect a test lamp between the switch up signal circuit of the inoperative window switch and the down signal circuit of the inoperative window switch. Operate the driver window switch to the UP and DOWN positions. Does the test lamp illuminate in both positions?	Go to Step 8	Go to Step 7
7	Test the power window master switch signal circuits of the inoperative window switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 12
8	Connect the inoperative window switch. Disconnect the inoperative window motor. Connect a test lamp between the power window motor up circuit of the inoperative window motor and the power window motor down circuit of the inoperative window motor. Operate the inoperative window switch to the UP and DOWN positions. Does the test lamp illuminate in both positions.	Go to Step 10	Go to Step 9
9	Test the inoperative window motor up and down circuits of the inoperative window motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 11
10	Inspect for poor connections at the harness connector of the inoperative window motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 14
11	Inspect for poor connections at the harness connector of the inoperative window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 15
12	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 13
13	Replace the driver window switch. Refer to Power Window Switch Replacement . Did you complete the replacement?	Go to Step 16
14	Replace the inoperative window motor. Refer to Window Regulator Motor Replacement - Front Door or Window Regulator Motor Replacement - Rear Door . Did you complete the replacement?	Go to Step 16
15	Replace the inoperative window switch. Refer to Power Window Switch Replacement or Power Window Switch Replacement - Rear Door . Did you complete the replacement?	Go to Step 16
16	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Windows Inoperative - One or Both Rear Windows

Power Windows Inoperative - Express Down Function

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the inoperative power windows express down function fault is present. Does the power window express down function operate normally?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 5	Go to Step 4
4	Replace the driver window switch. Refer to Power Window Switch Replacement . Did you complete the replacement?	Go to Step 5
5	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Windows Inoperative - Express Down Function

The number below refers to the step number on the diagnostic table.

3: This step determines if the power window master switch lockout signal circuit may be shorted to battery positive voltage. Normally, with rear window lockout not enabled, this circuit is closed within the master window switch and rear windows are operational from their respective switches. When the lockout feature is enabled, the circuit is open and no voltage is available at the rear window switches. A short to battery positive voltage on this circuit would cause power to be supplied to the rear window switches regardless of the lockout switch status.

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the inoperative power windows lockout function fault is present. Does the power windows lockout function operate normally?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Disconnect the driver window switch. Turn ON the ignition, with the engine OFF. Probe the power window master switch lockout signal circuit of the driver window switch with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 5	Go to Step 4
4	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 7	Go to Step 6
5	Repair the short to battery positive voltage in the power window master switch lockout signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 7
6	Replace the driver window switch. Refer to Power Window Switch Replacement . Did you complete the replacement?	Go to Step 7
7	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Windows Inoperative - Lockout Function

Power Window Inoperative - Driver Door

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the inoperative driver door power window fault is present. Does the driver door power window operate normally?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Are the driver door, left rear (LR) and right rear (RR) windows all inoperative?	Go to Power Windows Inoperative - All	Go to Step 4
4	Disconnect the driver window motor harness connector. Turn ON the ignition, with the engine OFF. Probe the power window motor left front up control circuit of the harness with a test lamp that is connected to ground. Operate the driver window switch to the UP position. Does the test lamp illuminate?	Go to Step 5	Go to Step 6
5	Connect a test lamp between the power window motor left front up control circuit of the harness connector and the power window motor left front down control circuit of the harness connector. Operate the driver window switch to the DOWN position. Does the test lamp illuminate?	Go to Step 8	Go to Step 7
6	Test the power window motor left front up control circuit of the driver window motor for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 9
7	Test the power window motor left front down control circuit of the driver window motor for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 9
8	Inspect for poor connections at the harness connector of the driver window motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 10
9	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 11
10	Replace the driver window motor. Refer to Window Regulator Motor Replacement - Front Door . Did you complete the repair?	Go to Step 12
11	Replace the driver window switch. Refer to Power Window Switch Replacement . Did you complete the repair?	Go to Step 12
12	Operate the system in order to verify the repair. Did you find and correct the condition?	System OK	Go to Step 2

Power Window Inoperative - Driver Door

Power Window Inoperative - Passenger Door

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Verify that the inoperative passenger door power window fault is present. Do the passenger door power windows operate normally?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Is the inoperative window the front passenger window?	Go to Step 4	Go to Power Windows Inoperative - One or Both Rear Windows
4	Disconnect the harness connector of the front passenger window switch. Turn ON the ignition, with the engine OFF. Probe the power window switch voltage supply circuit of the harness connector with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 5	Go to Step 12
5	Connect a test lamp between the power window master switch up signal circuit of the inoperative window switch and the power window master switch down signal circuit of the inoperative window switch. Operate the driver window switch to the UP and DOWN positions. Does the test lamp illuminate in both positions?	Go to Step 6	Go to Step 7
6	Connect the inoperative window switch. Disconnect the inoperative window motor. Connect a test lamp between the power window motor up circuit of the inoperative window motor and the power window motor down circuit of the inoperative window motor. Operate the inoperative window switch to the UP and DOWN positions. Does the test lamp illuminate in both positions?	Go to Step 10	Go to Step 8
7	Test the power window master switch signal circuits of the inoperative window switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 16	Go to Step 9
8	Test the inoperative window motor up and down circuits of the inoperative window motor for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 11
9	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 13
10	Inspect for poor connections at the harness connector of the inoperative window motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 14
11	Inspect for poor connections at the harness connector of the inoperative window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 15
12	Repair the open in the power window switch voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair?	Go to Step 16
13	Replace the driver window switch. Refer to Power Window Switch Replacement . Did you complete the replacement?	Go to Step 16
14	Replace the inoperative window motor. Refer to Window Regulator Motor Replacement - Front Door . Did you complete the replacement?	Go to Step 16
15	Replace the inoperative window switch. Refer to Power Window Switch Replacement . Did you complete the replacement?	Go to Step 16
16	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Window Inoperative - Passenger Door

Door Ajar Indicator Malfunction

Step	Action	Yes	No
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views DEFINITION: One of the door ajar messages does not display Ajar when the corresponding door is ajar, or, one of the door ajar messages displays Ajar when the corresponding door is closed
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Verify that the Door Ajar Indicator Malfunction complaint is present. Does the Door Ajar Indicator System operate as described in the system description and operation?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Install a scan tool. Turn ON the ignition, with the engine OFF. Close all doors. With a scan tool, navigate to the input list by selecting: Lighting Systems Data display Body control module (BCM) Input list Observe the parameter of each door ajar switch: Left front (LF) Door Ajar Switch Right front (RF) Door Ajar Switch Left rear (LR) Door Ajar Sw. Right rear (RR) Door Ajar Sw. Does the scan tool indicate that the Door Ajar Switch parameter is in the Door Closed state for all doors?	Go to Step 4	Go to Step 5
4	Open all of the vehicle doors. With the scan tool, observe the parameter of each door ajar switch in the Data Display, Inputs list of the BCM: LF Door Ajar Switch RF Door Ajar Switch LR Door Ajar Sw. RR Door Ajar Sw. Does the scan tool indicate that the Door Ajar Switch is in the Door Open state for all doors?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 6
5	Turn OFF the ignition. Disconnect the harness connector of the malfunctioning door lock. Turn ON the ignition, with the engine OFF. With the scan tool, observe the inoperative Door Ajar Switch parameter. Does the scan tool display Door Closed?	Go to Step 11	Go to Step 9
6	Turn OFF the ignition. Disconnect the harness connector of the malfunctioning door lock. Connect a 3-amp fused jumper wire between the door ajar switch signal circuit of the harness connector and ground. Turn ON the ignition, with the engine OFF. With the scan tool, observe the appropriate Door Ajar Switch parameter. Does the scan tool display ON?	Go to Step 7	Go to Step 8
7	Turn OFF the ignition. Connect the 3-amp fused jumper wire between the door ajar switch signal circuit and the ground circuit of the harness connector. Turn ON the ignition, with the engine OFF. With the scan tool, observe the appropriate Door Ajar Switch parameter. Does the scan tool display Door Open?	Go to Step 11	Go to Step 12
8	Test the door ajar switch signal circuit of the door lock for an open or a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 15	Go to Step 10
9	Test the door ajar switch signal circuit of the door lock for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 15	Go to Step 10
10	Inspect for poor connections at the harness connector of the suspect BCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs . Did you find and correct the condition?	Go to Step 15	Go to Step 13
11	Inspect for poor connections at the harness connector of the malfunctioning door lock. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 15	Go to Step 14
12	Repair the high resistance or open in the ground circuit of the door lock. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair?	Go to Step 15
13	Replace the BCM. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	Go to Step 15
14	Replace the door lock. Refer to Lock Actuator Replacement - Front Door or Lock Actuator Replacement - Rear Door . Did you complete the replacement?	Go to Step 15
15	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Door Ajar Indicator Malfunction

Diagnostic Aids

A short to ground in any door lock or unlock control circuit will most likely open the 15-amp DR LK/TRUNK fuse located in the instrument panel (I/P) fuse block and cause all door lock functions to become inoperative. However, if the lock or unlock control circuit is shorted to ground and the DR LK/TRUNK fuse does not open, the most likely affect will be that all door locks will be inoperative in one direction, i.e. if the unlock control circuit is shorted to ground, all doors may lock, but will not unlock, or, if the lock control circuit is shorted to ground, all doors may unlock, but will not lock.

The numbers below refer to the indicated step numbers on the diagnostic table.

4: This step determines if the malfunction may be caused by a short to ground in the battery positive voltage circuit of the body control module (BCM). The BCM provides the voltage needed to power all door lock actuator control circuits. A short to ground in the battery positive voltage circuit of the BCM will open the DR LK/TRUNK 15-amp fuse in the I/P fuse block and cause all door lock functions to become inoperative. While following the steps of this procedure, be sure you are testing the battery voltage circuit of the BCM that is associated with the door lock system. Use the door lock actuator schematics at the front of the doors information in order to correctly identify the appropriate circuit. (Scheme 3)
6: This step determines if the malfunction may be caused by an open in the battery positive voltage circuit of the BCM. The BCM provides the voltage needed to power all door lock actuator control circuits. An open in the BCM battery positive voltage circuit of the BCM will cause all door lock functions to be inoperative. While following the steps of this procedure, be sure you are testing the battery voltage circuit of the BCM that is associated with the door lock system. Use the door lock actuator schematics at the front of the doors information in order to correctly identify the appropriate circuit. (Scheme 3)
7: This step determines if the malfunction may be caused by an open in the ground circuit of the BCM. The BCM provides the ground path for all door lock actuator control circuits. While following the steps of this procedure, be sure you are testing the ground circuit of the BCM that is associated with the door lock system. Use the door lock actuator schematics at the front of the doors information in order to correctly identify the appropriate circuit. (Scheme 3)

Step	Action	Yes	No
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views DEFINITION: All door lock functions are inoperative from any switch or key FOB.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the all doors and switches power door locks inoperative fault is present. Does the power door locks system operate normally?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Is the DR LK/TRUNK fuse open?	Go to Step 4	Go to Step 5
4	Test the battery positive voltage circuit of the body control module (BCM) for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 8
5	Test the door lock and unlock control circuits for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 6
6	Test the battery positive voltage circuit of the BCM for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 7
7	Test the ground circuit of the BCM for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 10
8	Test the door lock actuator lock control circuits for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 9
9	Test the door lock actuator unlock control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 11
10	Test the door lock actuator lock control circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 12
11	Test the driver door lock actuator unlock control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 12
12	Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 14	Go to Step 13
13	Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement?	Go to Step 14
14	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Door Locks Inoperative - All Doors and Switches

Power Door Locks Inoperative - Key Cylinder Switches

Step	Action	Yes	No
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views DEFINITION: The key cylinder Lock/Unlock function is inoperative.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Verify that the power door locks key cylinder switches inoperative fault is present. Does the power door locks key cylinder switches system operate normally?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Does the power door locks system operate normally?	Go to Step 4	Go to Symptoms - Doors
4	Close all of the doors. Install a scan tool. With the scan tool, observe the appropriate Left Front (LF) or Right Front (RF) Key Cylinder Lock Switch parameter in the Data Display Inputs list of the body control module (BCM). Does the Key Cylinder Lock Switch parameter display the Idle state?	Go to Step 5	Go to Step 6
5	Insert the door key into the inoperative door lock cylinder switch. With the scan tool, observe the appropriate LF or RF Key Cylinder Lock Switch parameter in the Data Display Inputs list of the BCM. Turn the door key cylinder first to the LOCK position and then to the UNLOCK position. Did the Key Cylinder LOCK Switch parameter change from the Idle state to the Lock and UNLOCK states as expected?	Go to Step 12	Go to Step 7
6	Disconnect the harness connector of the inoperative door lock cylinder switch. Does the Key Cylinder Lock Switch parameter display the Idle state?	Go to Step 11	Go to Step 9
7	Disconnect the harness connector of the inoperative door lock cylinder switch. Connect a 3-amp fused jumper wire between the appropriate key switch lock or unlock signal circuit of the harness connector and a ground. With the scan tool, observe the appropriate Key Cylinder Lock Switch parameter. Did the Key Cylinder Lock Switch parameter display the appropriate state?	Go to Step 8	Go to Step 10
8	Connect the 3-amp fused jumper wire between the inoperative key switch lock or unlock signal circuit and the ground circuit of the harness connector. With the scan tool, observe the inoperative Key Cylinder Lock Switch parameter. Did the Key Cylinder Lock Switch parameter display the appropriate state?	Go to Step 11	Go to Step 13
9	Test the inoperative door lock cylinder switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 12
10	Test the inoperative door lock cylinder switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 12
11	Inspect for poor connections at the harness connector of the inoperative door lock cylinder switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 14
12	Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 16	Go to Step 15
13	Repair the open ground circuit of the door lock cylinder switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 16
14	Replace the inoperative door lock cylinder switch. Refer to Lock Cylinder Replacement - Door . Did you complete the replacement?	Go to Step 16
15	Replace the BCM. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	Go to Step 16
16	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Door Locks Inoperative - Key Cylinder Switches

Power Door Lock Inoperative - Driver Door

Step	Action	Yes	No
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views DEFINITION: The driver door lock actuator or lock switch does not operate.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Verify that the Power Door Lock Inoperative - Driver Door fault is present. Do the door locks operate as described in the Power Door Locks Description and Operation?	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	Install a scan tool. Close all of the vehicle doors. With the scan tool, observe the Left Front (LF) Door Lock Switch parameter in the Data Display, Inputs list of the body control module (BCM). Operate the driver door lock switch to both the LOCK and UNLOCK positions. Did the parameter change to both the LOCK and UNLOCK states?	Go to Step 6	Go to Step 4
4	IMPORTANT: If the 3-amp fuse of the jumper wire opens when the jumper wire is connected, test the appropriate signal circuit for a short to battery positive voltage. Disconnect the harness connector of the driver door lock switch. Connect a 3-amp fused jumper wire between the lock switch lock signal circuit of the harness connector and a ground. Observe the LF Door Lock Switch parameter. Connect the 3-amp fused jumper wire between the lock switch unlock signal circuit of the harness connector and a ground. Observe the LF Door Lock Switch parameter. Did the Scan Tool parameter change to the both the LOCK and UNLOCK states?	Go to Step 5	Go to Step 7
5	Connect the 3-amp fused jumper wire between the lock switch lock signal circuit and the ground circuit of the harness connector while observing the appropriate scan tool parameter. Did the Scan Tool parameter change to the LOCK state?	Go to Step 10	Go to Step 13
6	Disconnect the harness connector of the driver door lock actuator. Connect a test lamp between the door lock actuator lock control circuit and the door lock actuator unlock control circuit of the harness connector. Operate the driver door lock switch to the LOCK and UNLOCK positions. Did the test lamp illuminate in both positions?	Go to Step 12	Go to Step 8
7	Test the signal circuits of the driver door lock switch for the following: An open A short to ground A short to battery positive voltage Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 17	Go to Step 11
8	Test the lock control circuit of the driver door lock actuator for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 17	Go to Step 9
9	Test the unlock control circuit of the driver door lock actuator for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 17	Go to Step 11
10	Inspect for poor connections at the harness connector of the driver door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 17	Go to Step 14
11	Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 17	Go to Step 15
12	Inspect for poor connections at the harness connector of the driver door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 17	Go to Step 16
13	Repair the open ground circuit of the driver door lock switch. Refer to Wiring Repairs . Did you complete the repair?	Go to Step 17
14	Replace the driver door lock switch. Refer to Power Door Lock Switch Replacement . Did you complete the replacement?	Go to Step 17
15	Replace the BCM. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	Go to Step 17
16	Replace the driver door lock actuator. Refer to Lock Actuator Replacement - Front Door . Did you complete the replacement?	Go to Step 17
17	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

IMPORTANT
If the 3-amp fuse of the jumper wire opens when the jumper wire is connected, test the appropriate signal circuit for a short to battery positive voltage.

Power Door Lock Inoperative - Driver Door

Power Door Locks Inoperative - Passenger Door

Step	Action	Yes	No
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views DEFINITION: One or all 3 of the passenger door lock actuators do not operate, or, the front passenger door lock switch does not operate.
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the Power Door Locks Inoperative - Passenger Door fault is present. Do the door locks operate as described in the Power Door Locks Description and Operation?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	If the vehicle is a 4-door model, are all 3 of the passenger doors locks inoperative from both door lock switches?	Go to Step 10	Go to Step 4
4	Install a scan tool. Close all of the vehicle doors. With the scan tool, observe the Right Front (RF) Door Lock Switch parameter in the Data Display, Inputs list of the body control module (BCM). Operate the front passenger door lock switch to both the LOCK and UNLOCK positions. Did the parameter change to both the LOCK and UNLOCK states?	Go to Step 7	Go to Step 5
5	IMPORTANT: If the 3-amp fuse of the jumper wire opens when the jumper wire is connected, test the appropriate signal circuit for a short to battery positive voltage. Disconnect the harness connector of the front passenger door lock switch. Connect a 3-amp fused jumper wire between the lock switch lock signal circuit of the harness connector and a ground. Observe the RF Door Lock Switch parameter. Connect the 3-amp fused jumper wire between the lock switch unlock signal circuit of the harness connector and a ground. Observe the RF Door Lock Switch parameter. Did the Scan Tool parameter change to the both the LOCK and UNLOCK states?	Go to Step 6	Go to Step 8
6	Connect the 3-amp fused jumper wire between the lock switch lock signal circuit and the ground circuit of the harness connector while observing the appropriate Scan Tool parameter. Did the Scan Tool parameter change to the LOCK state?	Go to Step 11	Go to Step 14
7	Disconnect the harness connector of the inoperative door lock actuator. Connect a test lamp between the door lock actuator lock control circuit and the door lock actuator unlock control circuit of the harness connector. Operate the front passenger door lock switch to the LOCK and UNLOCK positions. Did the test lamp illuminate in both positions?	Go to Step 13	Go to Step 9
8	Test the signal circuits of the front passenger door lock switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 12
9	Test the lock control circuit of the inoperative door lock actuator for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 10
10	IMPORTANT: If all 3 passenger door locks are inoperative from both door lock switches, test the unlock control circuit between the splice and the BCM for an open. Test the unlock control circuit of the inoperative door lock actuator for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition?	Go to Step 18	Go to Step 12
11	Inspect for poor connections at the harness connector of the front passenger door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 15
12	Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 16
13	Inspect for poor connections at the harness connector of the inoperative door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 17
14	Repair the open ground circuit of the front passenger door lock switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 18
15	Replace the front passenger door lock switch. Refer to Power Door Lock Switch Replacement . Did you complete the replacement?	Go to Step 18
16	Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement?	Go to Step 18
17	Replace the inoperative door lock actuator. Refer to Lock Actuator Replacement - Front Door or Lock Actuator Replacement - Rear Door . Did you complete the replacement?	Go to Step 18
18	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

IMPORTANT
If the 3-amp fuse of the jumper wire opens when the jumper wire is connected, test the appropriate signal circuit for a short to battery positive voltage.

IMPORTANT
If all 3 passenger door locks are inoperative from both door lock switches, test the unlock control circuit between the splice and the BCM for an open.

Power Door Locks Inoperative - Passenger Door

The door open switches are an integral part of each door lock and are not serviced separately.

Step	Action	Yes	No
Schematic Reference: Interior Lights Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the automatic door locks are inoperative. Do the automatic door locks operate normally?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Verify that the automatic door locks feature is enabled. Refer to Vehicle Personalization in Personalization. Are the automatic door locks enabled?	Go to Step 4	Go to Vehicle Personalization in Personalization
4	Do the power door locks operate normally?	Go to Step 5	Go to Symptoms - Doors
5	Close all of the doors. With a scan tool, observe the parameter of each door open switch in the body control module (BCM), Data Display, Inputs List: Left front (LF) Door Open Switch Left rear (LR) Door Open Switch Right front (RF) Door Open Switch Right rear (RR) Door Open Switch Does the scan tool display Closed for all doors?	Go to Step 9	Go to Step 6
6	IMPORTANT: The door open switch is an integral part of the door lock. Disconnect the harness connector of the inoperative door open switch. With a scan tool, observe the inoperative Door Open Switch parameter in the Data Display, Inputs list of the BCM. Does the scan tool display Closed?	Go to Step 8	Go to Step 7
7	Test the door open switch signal circuit of the harness connector for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 9
8	Inspect for poor connections at the harness connectors of the inoperative door lock. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 10
9	Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 11
10	Replace the inoperative door lock. Refer to Lock Replacement - Front Door and Lock Replacement - Rear Door . Did you complete the replacement?	Go to Step 12
11	Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the repair?	Go to Step 12
12	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

IMPORTANT
The door open switch is an integral part of the door lock.

Automatic Door Locks Inoperative

If the power mirror system fuse is open and a short to ground in the battery positive voltage circuit is not detected, the fault could be a short to ground in one of the power mirror control circuits. This would open the power mirror system fuse when the mirror switch is pressed.
If both power mirrors are inoperative on one or more axis, the most probable cause is a power mirror switch failure. However, the fault could be an open circuit on 2 or more of the power mirror control circuits.
The power mirror assembly is equipped with a pigtail harness and is not serviceable. If an internal open or short is detected in the power mirror assembly, replace the power mirror assembly.

The numbers below refer to the step numbers on the diagnostic table.

6: This step tests the integrity of both the mirror control circuits and the power mirror switch. If both power mirrors are inoperative on one or more axis, begin testing by disconnecting one of the power mirrors, if an open circuit is detected and repaired for that power mirror, repeat step 6 for the other power mirror.
7: This step tests the integrity of the battery positive voltage circuit, not the fuse.

Step	Action	Yes	No
Schematic Reference: Outside Mirror Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Place the mirror selector switch in the LEFT mirror position. Activate the mirror position switch in the UP, DOWN, LEFT and RIGHT directions and note the operation. Place the mirror selector switch in the RIGHT mirror position. Activate the mirror position switch in the UP, DOWN, LEFT and RIGHT directions and note the operation. Do both power mirrors operate properly?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Are both the left and right power mirrors completely inoperative?	Go to Step 4	Go to Step 6
4	Disconnect the power mirror switch. Probe the battery positive voltage circuit of the power mirror switch harness connector with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 5	Go to Step 7
5	Connect a test lamp between the battery positive voltage circuit of the power mirror switch harness connector and the ground circuit of the power mirror switch harness connector. Does the test lamp illuminate?	Go to Step 9	Go to Step 15
6	Disconnect the inoperative power mirror. Connect a test lamp between the inoperative mirror motor control circuits of the power mirror harness connector. Place the mirror selector switch to the mirror to be tested. Activate the power mirror switch in both directions for the functions being tested. Does the test lamp illuminate in both directions?	Go to Step 12	Go to Step 8
7	Repair the battery positive voltage circuit of the power mirror switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 18	Go to Step 9
8	Test the mirror motor control circuits for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 9
9	Probe each of the power mirror motor control circuits of the power mirror switch harness connector with a test lamp that is connected to battery positive voltage. Did the test lamp illuminate at any of the power mirror motor control circuits?	Go to Step 13	Go to Step 10
10	Probe each of the power mirror motor control circuits of the power mirror switch harness connector with a test lamp that is connected to ground. Did the test lamp illuminate at any of the power mirror motor control circuits?	Go to Step 14	Go to Step 11
11	Inspect for poor connections at the harness connector of the power mirror switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 16
12	Inspect for poor connections at the harness connector of the inoperative power mirror. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 18	Go to Step 17
13	Repair the short to ground in the power mirror motor control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 18
14	Repair the short to battery positive voltage in the power mirror motor control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 18
15	Repair the open in the power mirror switch ground circuit. Refer Wiring Repairs to in Wiring Systems. Did you complete the repair?	Go to Step 18
16	Replace the power mirror switch. Refer to Power Mirror Switch Replacement . Did you complete the replacement?	Go to Step 18
17	Replace the power mirror motor. Refer to Motor Replacement - Power Mirror . Did you complete the replacement?	Go to Step 18
18	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Power Mirrors Inoperative

Heated Mirrors Inoperative

Step	Action	Yes	No
Schematic Reference: Outside Mirror Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Verify that the Heated Mirrors Inoperative complaint is present. Does the Heated Mirrors System operate as described in the Description and Operation?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Is the rear defogger inoperative also?	Go to Defogger Inoperative - Rear Window in Stationary Windows	Go to Step 4
4	Disconnect the inoperative mirror. Using a test lamp connected to ground, probe the heated mirror element supply voltage circuit. Turn ON the ignition. Place the rear defogger switch to the ON position. Does the test lamp illuminate?	Go to Step 5	Go to Step 6
5	Turn OFF the ignition. Using a test lamp, probe between the heated mirror element supply voltage circuit and the heated mirror element ground circuit. Turn ON the ignition. Place the rear defogger switch to the ON position. Does the test lamp illuminate?	Go to Step 8	Go to Step 7
6	Repair the poor connection or an open in the heated mirror element supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 9
7	Repair the poor connection or an open in the heated mirror ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 9
8	Replace the mirror face. Refer to Mirror Face Replacement . Did you complete the repair?	Go to Step 9
9	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Heated Mirrors Inoperative

Removal Procedure

Remove the front door trim pad. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the window and rearview mirror switches.
Remove the bezel clip (1).
Remove the bezel screw (2).
Press the 2 retaining clips (1) together and push the rear of the bezel out through the door trim.
Pull the bezel rearward to remove the front tab (2).
Remove the bezel from the vehicle.

Installation Procedure

Position the retainer tab into the trim panel and press down on the bezel to seat the retainer clips.
Install the pull handle housing screw. Tighten: Tighten the screws to 3 N.m (27 lb in).
Install the pull handle housing clip.
Install the window and rearview mirror switches.
Install the front door trim pad. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Use a flat-bladed tool to remove the power window electrical connectors.
Use a flat-bladed tool to remove the power window switch from the trim mounting plate.
Remove the switch from the vehicle.

Install the switch into the mounting plate.
Connect the electrical connectors.
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Use a flat-bladed tool to remove the power window switch from the door harness connector.
Remove the switch from the vehicle.

Connect the window switch to the door harness electrical connector.
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Disconnect the electric connector to the door switch.
Use a flat-bladed tool to remove the lock switch from the trim panel.

Press the door lock switch into the door trim panel.
Connect the electrical connector to the switch.
Install the door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Disconnect the electrical connector from the switch.
Using a small flat-bladed tool, carefully release the power mirror switch retainers and remove the switch.
Remove the switch from the vehicle.

Install the electrical connector to the power mirror switch.
Press the switch into the retainer plate.
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the following switch electrical connectors: The power rearview mirror switch (1) The power door switch (2) The power window switch (3) The rear compartment lid switch (4)
Remove the harness from the trim panel.

Position the harness to the trim panel.
Press the harness connectors into the following switches: The power rearview mirror switch (1) The power door switch (2) The power window switch (3) The rear compartment lid switch (4)
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Tools Required

J 38778 Door Trim Pad Clip Remover

Remove the cover in the armrest pull cup.
Remove the armrest pull cup screws.
Remove the screw cover from the inside door handle. Remove the screw.
Slide the J 38778 behind the door trim extension panel. Press out to free the retainer.
Starting at the door bottom, use the J 38778 to disengage the retainers from the door trim panel.
Lift the trim panel up to release the top edge and move it away from the door to expose the inside door handle lock rod.
Using needle nose pliers, compress the plastic connector on the cable end to release the cable from the door panel.
Disconnect the door handle cable end from the door handle.
Disconnect the electrical connector to the door electric harness. Pinch the release tabs and lift the cam lock and separate the connector.
Remove the front door trim panel from the vehicle.

Connect the electrical connector to the door electric harness. Press the cam lock in to secure the connector.
Connect the door handle cable to the door handle.
Position the top of the trim panel at the window opening and press down.
Align the fasteners into the holes in the door metal.
Firmly press the door panel to seat the fasteners.
Install the armrest pull cup screws. Tighten: Tighten the screws to 3 N.m (27 lb in).
Install the inside door handle screw. Tighten: Tighten the screw to 3 N.m (27 lb in).
Install the screw cover.

J 38778 Door Trim Pad Clip Remover

Open the screw cover on the inside door handle and remove the screw.
Remove the arm rest pull cup cover (1).
Remove the armrest pull cup screws.
Starting at the door bottom, use the J 38778 to release the door trim panel retainers.
Lift the trim panel up to release the top edge and move it away from the door.
Using needle nose pliers, compress the plastic connector on the door handle cable end from the door panel.
Use a flat-bladed tool to spread the power window switch retainers and remove the switch from the door panel.
Remove the rear door trim panel from the vehicle.

Position the trim panel by the door. Press the power window switch into its installed position
Connect the door handle cable to the door handle.
Position the top of the trim panel at the window opening and press down.
Align the fasteners into the holes in the door metal.
Firmly press the door panel to seat the fasteners.
Install the armrest pull cup screws. Tighten: Tighten the screws to 3 N.m (27 lb in).
Install the armrest pull cup cover (1).
Install the door handle screw. Tighten: Tighten the screw to 3 N.m (27 lb in).
Press the screw cover back into its installed position.

Open the door.
Remove the rear door trim pad. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove both push pins from the energy absorber pad (2).
Grasp the energy absorber pad (1) with both hands and pull rearward to release it from the door. If necessary, warm the inner door panel to soften the adhesive.
Remove the inner energy absorber pad from the door.

Clean the rear inner door panel using a 50/50 mixture of isopropyl alcohol and water by volume on a dampened lint free cloth before reinstalling the energy absorber pad.
Remove the double backed protective tape backing from the door inner energy absorber pad.
Install the energy absorber pad (1) to the door.
Install both push pins to the energy absorber pad (2).
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim pad. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Close the door.

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the water deflector.

Align the door water deflector to the inner door panel.
Install the water deflector using a small roller to outline the water deflector in order to ensure proper seating.
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the water deflector.

Align the water deflector to the inner door panel.
Install the water deflector using a small roller to outline the water deflector in order to ensure proper seating.
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Up/Down or In/Out Adjustment

Loosen the bolts on the door side upper and lower hinges. Do not remove the bolts.
Adjust the door up or down by repositioning the door as needed.
Adjust the door in or out by repositioning the door as needed.
Tighten the door side upper and lower hinge bolts. Tighten: Tighten the bolts to 33 N.m (24 lb ft).

Fore/Aft Adjustment

Remove the front fender insulator in order to gain access to the body side hinge bolts.
Adjust the door fore and aft by repositioning the door as needed.
Tighten the body side upper and lower hinge bolts. Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the front fender insulator.

Apply masking tape to the fender and door edges.
Open the front door.
Remove the side front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door speaker. Refer to «Speaker Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/entertainment-systems/#entertainment-systems) in Entertainment.
Remove the front door outside mirror. Refer to «Mirror Replacement - Power»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door inner sealing strip. Refer to «Sealing Strip Replacement - Front Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door frame applique. Refer to «Door Frame Applique Replacement - Front»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door outer belt sealing strip.
Remove the front door window weatherstrip. Refer to «Weatherstrip Replacement - Front Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door window channel retainer. Refer to «Window Channel Retainer Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door window. Refer to «Window Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door window regulator. Refer to «Window Regulator Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front outside door handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door lock. Refer to «Lock Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door body side molding. Refer to «Molding Replacement - Body Side»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#exterior-trim) .
Remove the front door inflatable restraint side impact sensor. Refer to «Inflatable Restraint Side Impact Sensor Replacement»(/buick/lacrosse/i-2004-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
Remove the front door rubber conduit. Refer to «Rubber Conduit Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door electrical harness from the door.
Support the front door.
Remove the front door top intermediate bolt front the door hinge. Remove the front lower hinge bolts to the door side.
Remove the front door from the vehicle.

Install the front door to the vehicle.
Install the front door top intermediate to the door hinge Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the front lower hinge bolts to the door side. Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Remove the support from the front door.
Install the front door rubber conduit. Refer to «Rubber Conduit Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door electrical harness to the door.
Install the front door inflatable restraint side impact sensor. Refer to «Inflatable Restraint Side Impact Sensor Replacement»(/buick/lacrosse/i-2004-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
Install the front door body side moldings. Refer to «Molding Replacement - Body Side»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#exterior-trim) .
Install the front door lock. Refer to «Lock Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front outside door handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door window regulator. Refer to «Window Regulator Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door window. Refer to «Window Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door window channel retainer. Refer to «Window Channel Retainer Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door window weatherstrip. Refer to «Weatherstrip Replacement - Front Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door outer belt sealing strip.
Install the front door frame applique. Refer to «Door Frame Applique Replacement - Front»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door inner sealing strip. Refer to «Sealing Strip Replacement - Front Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door outside mirror. Refer to «Mirror Replacement - Power»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door speaker. Refer to «Speaker Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/entertainment-systems/#entertainment-systems) in Entertainment.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the side front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install and adjust the front door. Refer to «Door Adjustment - Front»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Close the rear door.
Remove the masking tape from the front door and fender.

Up/Down or In/Out Adjustment

Open the rear door.
Apply masking tape to the fender and the door edges. Loosen the door side hinge bolts in the specified sequence (1, 2, 3, 4). Do not remove the bolts from the door.
Adjust the door up or down by repositioning the door as needed.
Adjust the door in or out by repositioning the door as needed.

Install the door side hinge bolts in the specified sequence (1, 2, 3, 4). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Inspect the door for proper operation and alignment.
Remove the masking tape.

Fore/Aft Adjustment

Apply masking tape to the fender and door edges. Loosen the hinge pillar side bolts in the specified sequence (1, 2, 3, 4). Do not remove the bolts from the door.
Adjust the door fore and aft by repositioning the door as needed.

Install the hinge pillar side bolts in the specified sequence (1, 2, 3, 4). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Inspect the door for proper operation and alignment.
Remove the masking tape.

Apply masking tape to the door edges.
Open the rear door.
Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door inner sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front of the rear door frame applique and the rear. Refer to «Door Frame Applique Replacement - Rear»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door outer sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Outer»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door window. Refer to «Window Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door lock. Refer to «Lock Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door outside door handle. Refer to «Door Handle Replacement - Rear Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door window weatherstrip. Refer to «Weatherstrip Replacement - Rear Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door window channel retainer. Refer to «Window Channel Retainer Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door window regulator. Refer to «Window Regulator Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door rubber conduit. Refer to «Rubber Conduit Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Disconnect the rear door wiring harness.
Remove the rear door electrical harness from the door.
Support the rear door.
Remove the rear door top intermediate bolt from the door side hinge.
Remove the rear door lower hinge bolts from the door side (1).
Remove the rear door from the vehicle.

Install the rear door to vehicle.
Install the rear door top intermediate bolt to the door hinge. Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the rear door lower hinge bolts (1) to the door side (1). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Remove the rear door support.
Install the rear door rubber conduit. Refer to «Rubber Conduit Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door electrical harness.
Connect the rear door wiring harness.
Install the rear door window regulator. Refer to «Window Regulator Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door window channel retainer. Refer to «Window Channel Retainer Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door window weatherstrip. Refer to «Weatherstrip Replacement - Rear Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door outside door handle. Refer to «Door Handle Replacement - Rear Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door lock. Refer to «Lock Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door window. Refer to «Window Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door inner sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door outer sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Outer»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front of the rear door frame applique and the rear. Refer to «Door Frame Applique Replacement - Rear»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rubber conduit. Refer to «Rubber Conduit Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Adjust the rear door. Refer to «Door Adjustment - Rear»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Close the rear door.
Remove the masking tape from the rear door edges.

J 36604 Door Hinge Spring Compressor. See Special Tools .

Open the front door.
Support the door in the fully open position.
Use the J 36604 to remove the hinge spring from the door. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__special-tools) . Place the hinge spring tool J 36604 as close to each end of the spring as possible. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__special-tools) .
Remove and discard the old hinge spring.

Use the J 36604 to install the hinge spring to the door. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__special-tools) . Place the hinge spring tool J 36604 as close to each end of the spring as possible. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__special-tools) .
Install the new hinge spring into the hinge. Ensure that the hinge spring is fully seated and remove the J 36604 tool. See «Special Tools»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__special-tools) .
Inspect the door for proper operation.
Lubricate the hinge roller pins using multi-purpose lubricant Superlube GM P/N 12346241 (Canadian P/N 10953474) or an equivalent.
Close the door.

Apply masking tape to the fender and door edges.
Open and support the door.
Clean the area around the hinge and mark the location with a grease pencil.
If the upper hinge is broken, remove the upper hinge bolts from the door side in the specified sequence (1, 4).
Remove the upper hinge bolts from the hinge pillar side in the specified sequence (1, 4, 5).
If the lower hinge is broken, remove the lower hinge bolts from the door side in the specified sequence (3, 2).
Remove the lower hinge bolts from the hinge pillar side in the specified sequence (3, 2).
Remove the broken hinge from the door.

Install the new hinge to the door. Position the hinge to the alignment marks on the hinge pillar and the door. Install the lower hinge bolts to the hinge pillar side in the specified sequence (3, 2). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the lower hinge bolts to the door side in the specified sequence (3, 2). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the upper hinge bolts to the hinge pillar side in the specified sequence (1, 4, 5). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the upper hinge bolts to the door side in the specified sequence (1, 4). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Remove the support from the door.
Inspect the door for proper operation.
Remove the masking tape.

Apply masking tape to the door edge.
Open the front door to expose the rear door hinges. Do not open the door to replace the hinges.
Clean the area around the hinge and mark the location with a grease pencil.
If the upper hinge is broken, remove the upper hinge bolts from the door side in the specified sequence (1, 4).
Remove the upper hinge bolts from the hinge pillar side in the specified sequence (1, 4).
If the lower hinge is broken, remove the lower hinge bolts from the door side in the specified sequence (3, 2).
Remove the lower hinge bolts from the hinge pillar side in the specified sequence (3, 2).
Remove the broken hinge from the door.

Install the new hinge to the door.
Position the door hinge to the alignment marks on the hinge pillar or door side as follows
Install the lower hinge bolts to the hinge pillar side in the specified sequence (3, 2). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the lower hinge bolts to the door side in the specified sequence (3, 2). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the upper hinge bolts to the hinge pillar side in the specified sequence (1, 4). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Install the upper hinge bolts to the door side in the specified sequence (1, 4). Tighten: Tighten the bolts to 33 N.m (24 lb ft).
Remove the support from the door.
Inspect the door for proper operation.
Remove the masking tape.

Raise the window to the full up position.
Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front water deflector, as necessary. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Apply masking tape around the outside handle.
Open the outside door handle rod to lock clip located on the door lock.
Remove the lock cylinder rod from the outside door handle. Refer to «Lock Cylinder Replacement - Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the door handle bolt access tape from the inner door panel.
Remove the bolts (1, 2) from the outside handle.
Remove the outside handle (1) and the rod (2) from the door.

Install the outside handle (1) and the rod (2) to the door.
Install the outside handle bolts (1 2) to the door. Tighten: Tighten the bolts to 10 N.m (89 lb in).
Install the outside handle bolt access tape to the inner door panel.
Install the lock cylinder rod to the outside door handle. Refer to «Lock Cylinder Replacement - Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the outside handle rod into the clip
Close the clip cover over the outside handle rod.
Inspect the outside handle for proper operation.
Remove the masking tape.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Raise the window to the full up position.
Apply masking tape around the outside handle.
Open the outside handle rod to lock clip located on the door lock.
Remove the rear door lock. Refer to «Lock Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the outside door handle bolt access tape.
Remove the bolts (3) from the rear door handle.
Remove the outside handle bolt (2) through the latch hole.
Remove the outside handle (1) and the rod (2) from the door.

Install the outside door handle (1) and the rod (2) to the door.
Install the outside handle bolt (2) through the latch hole. Tighten: Tighten the bolt to 10 N.m (89 lb in).
Install the bolts (3) to the rear door handle. Tighten: Tighten the bolt to 10 N.m (89 lb in).
Install the rear door lock. Refer to «Lock Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the outside door handle bolt access tape.
Install the outside handle rod into the clip.
Close the clip cover over the outside door handle rod.
Inspect the outside door handle for proper operation.
Remove the masking tape.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front water deflector, as necessary. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Raise the window to the full up position.
Apply masking tape around the outside door handle.
Open the outside door handle rod to lock clip located on the door lock. The outside door handle rod should be loose from the lock.
Adjust the rod as needed.
Close the clip cover over the outside handle rod.

Inspect the door for proper operation.
Install the front door water deflector as needed. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Raise the window to the full upright position.
Apply masking tape around the outside door handle.
Open the outside door handle rod to lock clip located on the door lock. The outside handle rod should be loose from the lock.
Remove the outside door handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the outside handle (1) and the rod (2) from the door.

Install the outside handle (1) and rod (2) to the door.
Install the outside door handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the outside handle rod into the clip.
Close the clip cover over the outside handle rod.
Remove the masking tape.
Inspect the door for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim pad. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) . The water deflector does not need to be completely removed.
Raise the window to the full upright position.
Open the outside handle rod to lock clip located on the door lock.
Adjust the rod as needed.
Close the clip cover over the outside handle rod.

Inspect the door for proper operation.
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door trim pad. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Using a flat-bladed tool, remove the retainer from the door handle.
Use a flat-bladed tool to spread the power door lock switch retainers and remove the switch from the door handle.
Remove the inside handle from the door trim panel.

Position the handle on the trim panel.
Press the retainer onto the handle.
Press the door lock switch into the handle.
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Using a flat-bladed tool, remove the retainer from the door handle.
Remove the inside handle from the door trim panel.

Position the handle on the trim panel.
Press the retainer onto the handle.
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Raise the door window to the full up position.
Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door lock. Refer to «Lock Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the lock and cable through the opening in the inner door panel.

Install the lock and cable through the opening in the inner door panel.
Install the front door lock. Refer to «Lock Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the door for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Raise the door window to the full up position.
Open the outside handle rod to lock clip located on the door lock.
Remove the outside door handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the outside door handle (1) and the rod (2) from the door.

Install the outside door handle (1) and the rod (2) to the door.
Install the outside door handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the outside handle rod into the clip.
Close the clip over the outside handle rod.
Remove the masking tape.
Inspect the door for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door lock from the door. Refer to «Lock Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the lock and cable through the opening in the inner door panel.

Install the lock and cable through the opening in the inner door panel.
Install the door lock in the door. Refer to «Lock Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the door for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door lock. Refer to «Lock Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the inside door handle locking rod from the door lock.

Install the inside door handle locking rod to the door lock.
Install the front door lock. Refer to «Lock Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the door for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the bellcrank from the door by releasing the two inner retaining clips.
Remove both door rods from the bellcrank.

Install both door rods to the new bellcrank.
Install the bellcrank to the door by snapping it in place.
Inspect the door for proper operation.
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Open the outside handle rod to lock clip located on the door lock. The outside handle rods should be loose from the lock.
Remove the lock cylinder rod from the outside door handle. Refer to «Lock Cylinder Replacement - Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the screws from door lock.
Remove the door lock and cable through the access hole in the door inner panel.
Disconnect the electrical connector from the lock.
Remove the lock and cable from the door.

Install the lock and cable to the door.
Connect the electrical connector to the lock.
Install the lock and cable through the access hole in the door inner panel.
Install the screws to the door lock. Tighten: Tighten the screws to 10 N.m (89 lb in).
Install the lock cylinder rod to the outside door handle. Refer to «Lock Cylinder Replacement - Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the outside handle rod into the clip.
Close the clip over the outside handle rod.
Install the inside door handle. Refer to «Door Handle Replacement - Front Inside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the door for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Open the outside handle rod to lock clip located on the door lock. The door handle rod should be loose from the lock.
Remove the screws (1, 3, 2) securing the lock to the door.
Remove the door lock and cable/rod through the access hole in the door inner panel.
Disconnect the electrical connector from the lock by pulling out the tab.
Remove the door lock and cable from the lock.

Install the door lock and cable to the lock.
Connect the electrical connector to the lock by pushing in on the tab.
Install the lock and cable/rod through the access hole in the inner door panel.
Install the screws (1, 3, 2) securing the lock to the door.
Install the top screw first (1) then the bottom (2) and lastly the middle screw (3). Tighten: Tighten the screws to 10 N.m (89 lb in).
Install the outside handle rod into the clip.
Close the clip over the outside handle rod.
Inspect the door for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Lock Actuator Replacement - Front Door

The door lock actuator is part of the front door lock and can not be serviced separately. Refer to Lock Replacement - Front Door for service procedure.

Lock Actuator Replacement - Rear Door

The door lock actuator is part of the rear door lock and can not be serviced separately. Refer to Lock Replacement - Rear Door for service procedure.

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door outside handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the lock paw retaining clip (2).
Remove the lock cylinder paw (3).
Remove the lock cylinder (5) from the outside door handle.

Install the lock cylinder (5) into the outside door handle.
Install the lock cylinder paw (3).
Install the lock cylinder paw retaining clip (2).
Install the front door outside handle. Refer to «Door Handle Replacement - Front Outside»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the door for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Frozen Lock Cylinder Repair

Repair frozen lock cylinders due to cold weather using the following procedure

Apply heat to the cylinder area with a heat gun.
Use a paper clip or a similar item in order to hold the shutter door open.
Use compressed air and a blow gun attachment in order to force air into the cylinder.
While holding the shutter door open, inject a small amount of multi-purpose lubricant GM P/N 12346241, (Canadian P/N 10953474) or equivalent.
Work the key into the cylinder several times.
Wipe any excess lubrication residue from the key.

Lock Striker Adjustment - Door

Ensure that the door is properly aligned with the door opening before proceeding with the striker adjustment.
Open and close the door on the striker (2). Note if the door drags on the striker causing the door to move upward or downward upon contact with the striker. Also note the closing effort to fully engage the latch.
Using a soft marker, mark around the striker (2) for reference of the original position. Loosen the striker screws just enough to allow the movement of the door striker and shims if equipped.
Adjust the door striker up or down and inboard or outboard as required.
Move the striker to eliminate drag on the striker and door latch and to achieve proper door position within door opening. Start with up/down position, then position the striker to achieve proper alignment to the door opening. Set the in/out adjustment for proper door seal engagement ensuring that the door closing efforts are correct.
Adjust the striker and add spacers as required. Tighten: Tighten the screws to 20 N.m (15 lb ft).
Inspect the door for proper operation.
Close the door.

Remove the rear quarter lower trim. Refer to «Trim Panel Replacement - Rear Quarter Lower»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Remove the lower center pillar trim. Refer to «Trim Panel Replacement - Lower Center Pillar»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Mark the position of the striker with a grease pencil.
Remove the screws from the door striker.
Remove the striker (2).

Install the striker (2) to the door opening. Align the striker to the alignment marks.
Install the screws to the striker. Tighten: Tighten the screws to 20 N.m (15 lb ft).
Adjust door striker. Refer to «Lock Striker Adjustment - Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system__lock-striker-adjustment-door) .
Inspect the door for proper operation.
Install the front or the rear trim if removed.
Install the rear quarter lower trim panel. Refer to «Trim Panel Replacement - Rear Quarter Lower»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Install the lower center pillar trim. Refer to «Trim Panel Replacement - Lower Center Pillar»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Causes of Slow Moving Window

Listed below are conditions that may cause a slow moving window. The window run channel outboard lip at the rearview mirror is rolled over or the window run channel outboard lip at the rear of door frame (2). The window is not seated in the run channel. The window is misaligned in the opening. The regulator is misaligned causing misalignment of the window. Inspect the power window motor for being loose.
After inspecting the conditions above, do the following: Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Ensure that the window guide to is fully seated and clipped.
Ensure that the window is fully seated into the window guide run channel.
Inspect the window for equal distance between the front and rear run channels.

Scheme 10

Scheme 10: Adjustment Procedure

Inspect for the following conditions before making adjustments. Using a flat-bladed tool, straighten the run channel lip by pulling it out to its correct position. Use a flat-bladed tool to push the run channel rearward to seat it in the door frame. Inspect the window guide retainer to window for the proper alignment to the slots in the window. Inspect the window to be straight up and down position. Loosen the bolts that attach the window regulator (1) to the inner door panel, in the specified sequence (2, 3, 4).
Tighten the bolts that attach the window regulator (1) to the inner door panel in the specified sequence (2, 3, 4). Tighten: Tighten the bolts to 10 N.m (89 lb in).
Inspect the window for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Listed below are conditions that may cause a slow moving window. The window run channel outboard lip at the rear of door frame. The window is not seated in the run channel. The window is misaligned in the opening. The regulator is misaligned causing misalignment of the window.
After inspecting the conditions above, do the following: Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Ensure that the window guide to is fully seated and clipped. Ensure that the window is fully seated in the window guide run channel.
Inspect the window for equal distance between the front and rear run channels.
Inspect the power window motor for being loose.
Inspect the window for alignment.

Adjustment Procedure

Inspect for the following conditions before making adjustments. Using a flat-bladed tool, straighten the run channel lip by pulling it out to its correct position. Use a flat-bladed tool to push the run channel rearward to seat it in the door frame. Inspect the window guide channel to window bolts to ensure that they are in the proper slots and the window is not tilted forward. Inspect the window to be straight up and down position. Loosen the bolts that attach the window regulator (1) to the inner door panel, in the specified sequence (2, 3, 4).
Loosen the bolts that attach the window regulator (1) to the inner door panel in the specified sequence (2, 3, 4). Tighten: Tighten the bolts to 10 N.m (89 lb in).
Inspect the window for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Apply masking tape to the outer reveal.
Raise the window far enough in order to gain access through the inner door panel to the window guide retainer clip.
Push inward on the window guide retainer clip locks, lift upward on the window until released from the retaining clip.
Raise the window to the full up position and tape in place.
Disconnect the electrical connector from the power window motor by pulling up on the tab to release it.
Remove the bolt from the window regulator motor (3).
Remove the nuts (2, 4) from the window regulator studs.
Remove the window regulator and motor through the access opening in the inner door panel.
Remove the power window motor from the window regulator. Refer to «Window Regulator Motor Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Install the power window motor to the window regulator. Refer to «Window Regulator Motor Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the window regulator and motor through the access opening in the inner door panel.
Install the nuts (2, 4) to the window regulator studs.
Install the window regulator motor bolts (3).
Tighten the window regulator bolt and nuts to the door. Tighten: Tighten the bolt and nuts to 10 N.m (89 lb in).
Connect the electrical connector to the power window motor and push in on the tab to lock in place.
Remove the masking tape.
Lower the window far enough in order to gain access through the inner panel to the window guide retainer to snap the window into the retainer.
Inspect the window for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Interior Trim.
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Raise the window far enough in order to gain access through the inner door panel to the window guide retainer clips.
Push inward on the window guide retainer clip locks, lift upward on the window until released from the retaining clip.
Raise the window to the full up position and tape in place.
Disconnect the electrical connector from the power window motor.
Loosen the bolt to the window regulator motor (2, 3, 4).
Lift the motor free of the retaining slot.
Remove the window regulator and motor from the door.
Remove the power window motor from the window regulator. Refer to «Window Regulator Motor Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Install the power window motor to the window regulator. Refer to «Window Regulator Motor Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the bolts (2, 3, 4) to the window regulator and motor.
Position the window regulator and motor into the locating slots of the inner door panel.
Install the window regulator and motor bolts to the door. Tighten: Tighten the bolts to 10 N.m (89 lb in).
Connect the electrical connector to the power window motor.
Remove the masking tape.
Lower the window far enough in order to gain access through the inner door panel to the window guide retainer clips.
Inspect the window for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door window regulator. Refer to «Window Regulator Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the window regulator and motor through the access opening in the inner panel.
Remove the power window motor bolts from the window regulator.

Install the window regulator and motor through the access opening in the inner panel.
Install the power window motor bolts to the window regulator. Tighten: Tighten the bolts to 6 N.m (53 lb in).
Install the window regulator and motor through the access opening.
Install the front door window regulator. Refer to «Window Regulator Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the window for proper operation.
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the window regulator. Refer to «Window Regulator Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the window regulator and motor through the access opening in the door panel.
Remove the window regulator motor bolts from the window regulator.

Install the window regulator motor bolts to the window regulator. Tighten: Tighten the bolts to 6 N.m (53 lb in).
Install the window regulator and motor through the access opening.
Install the window regulator. Refer to «Window Regulator Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the masking tape.
Inspect the window for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Apply masking tape to the outer applique and frame.
Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door inner window belt sealing strip. Refer to «Sealing Strip Replacement - Front Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Lower the window far enough in order to gain access through the inner panel, unsnap the window guide retainer from the window.
Push inward on the window guide retainer clip locks, lift upward on the window until released from the retaining clip.
Lower the window regulator to the full down position.
Remove the window from the door.

Position the window in between the inner and the outer panels. Point the lower front corner of the front door window down. Pass the front door window through the belt opening. Align the edges of the window with the door window weatherstrip. Ensure that both sealing lips on the front door outer belt sealing strip are not rolled over and pointing downward. If this condition is present, the window will not raise properly.
Raise the window regulator to the middle position.
Install the rearward window to the guide retainer, snap the window into the window regulator.
Remove the masking tape.
Inspect the window for proper operation.
Install the front door inner belt sealing strip. Refer to «Sealing Strip Replacement - Front Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Apply masking tape to the outer applique and frame.
Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door window inner belt sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Lower the window far enough in order to gain access through the inner panel, unsnap the window guide retainer from the window.
Push inward on the window guide retainer clip locks, lift upward on the window until released from the retaining clip.
Lower the window regulator to the full down position.
Remove the window from the door.

Position the window in between the inner and the outer panels. Point the lower front corner of the rear door window down. Pass the rear door window through the belt opening. Align the edges of the window with the rear door window weatherstrip. Ensure that both sealing lips on the rear door outer belt sealing strip are not rolled over and pointing downward. If this condition is present, the rear door window will not raise properly.
Raise the window regulator to the middle position.
Install the rearward window into the window guide retainer, snap the window into the window regulator.
Remove the masking tape.
Inspect the window for proper operation.
Install the rear door window inner belt sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door frame applique. Refer to «Door Frame Applique Replacement - Front»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the outside rear view mirror. Refer to «Mirror Replacement - Power»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the front door inner window belt sealing strip. Refer to «Sealing Strip Replacement - Front Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Position the window to the full down position.
Remove the front door window weatherstrip. Refer to «Weatherstrip Replacement - Front Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the bolt (3) from the window channel retainer (2).
Drill out the 4 mm (5/32 in) rivets (1) along the inside edge of the window channel retainer.
Remove the window channel retainer from the door.

Install the window channel retainer to the door.
Install the new 4 mm (5/32 in) rivets (1) along the inside edge of the window channel retainer.
Install the bolt (3) to the window channel retainer (2). NOTE: Refer to «FASTENER NOTICE»(/buick/lacrosse/i-2004-2009/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices. Tighten: Tighten the screw to 2 N.m (18 lb in).
Install the front door window weatherstrip. Refer to «Weatherstrip Replacement - Front Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) . Install the front door window weatherstrip by working it around the door frame. Ensure that the weatherstrip is fully seated into the window channel retainer.
Inspect the window for proper operation.
Install the front door frame applique. Refer to «Door Frame Applique Replacement - Front»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door inner window belt sealing strip. Refer to «Sealing Strip Replacement - Front Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the outside mirror. Refer to «Mirror Replacement - Power»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door water deflector. Refer to «Water Deflector Replacement - Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door frame applique. Refer to «Door Frame Applique Replacement - Rear»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Position the window to the full down position.
Remove the rear door inner belt sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door outer belt sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Outer»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door window weatherstrip. Refer to «Weatherstrip Replacement - Rear Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Drill out the 4 mm (5/32 in) rivets (1) along the inside edge of the window channel retainer (2).
Remove the bolt (3) from the corner of the window channel retainer (2).
Remove the window channel retainer from the door.

Install the window channel retainer to the door.
Install the new 4 mm (5/32 in) rivets (1) along the inside edge of the window channel retainer (2).
Install the bolt (3) to the lower corner of the window channel retainer (2).
Install the bolt (3) to the lower corner of the window channel retainer (2). Tighten: Tighten the screw to 10 N.m (89 lb in).
Install the rear door window weatherstrip. Refer to «Weatherstrip Replacement - Rear Door Window»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) . Install the door window weatherstrip by working it around the door frame. Ensure that the weatherstrip is fully seated into the window channel retainer.
Install the rear door outer belt sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Outer»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door inner belt sealing strip. Refer to «Sealing Strip Replacement - Rear Door Window Belt Inner»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door frame applique. Refer to «Door Frame Applique Replacement - Rear»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the window for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Position the window in the full down position.
Remove the window lower run channel bolts (1).
Remove the window lower run channel (2) from the door.

Install the window lower run channel (2) in the door.
Install the window lower run channel bolts (1). Tighten: Tighten the bolts to 10 N.m (89 lb in).
Inspect the window for proper operation.
Install the rear door water deflector. Refer to «Water Deflector Replacement - Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Lower the window to the full down position.
Apply masking tape to the door frame and applique.
Push downward on the applique until it releases from the upper reveal molding. Pulling rearward until it releases from the door retaining clips.

Insert the applique behind the outer sealing strip. Push downward and then slide upward snapping it into the retaining clips located in the door frame.
Remove masking tape to the door frame and applique.

Lower the window to the full down position.
Apply masking tape to the door frame and applique.
Push downward on the applique until it releases from the upper reveal molding. Pulling rearward until it releases from the door retaining clips.

Insert the applique behind the outer sealing strip. Push downward and then slide upward snapping it into the retaining clips located in the door frame.
Remove masking tape to the door frame and applique.

Open the front door.
Remove the rubber conduit (1) from where it attaches at the front pillar.
Carefully pull the wire harness out from the front pillar to expose the harness connector.
Disconnect the door wiring harness electrical connector.
Remove the rubber conduit from the door and remove it from the electrical harness.

Thread the electrical harness through the rubber conduit (1).
Install the rubber conduit into the door.
Connect the electrical connector.
Install the rubber conduit to the front pillar.
Close the front door

Open the rear door.
Remove the rubber conduit (1) from the center pillar.
Disconnect the electrical connector.
Remove the rubber conduit (1) from the door.

Install the rubber conduit (1) to the door.
Connect the electrical connector.
Install the rubber conduit (1) to the center pillar.
Close the rear door.

Apply masking tape to the door and applique.
Lower the window to the full down position.
Remove the outside rearview mirror. Refer to «Mirror Replacement - Power»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the outer belt sealing strip screw (2) located at the rear of the door.
Release the front outer belt sealing strip retaining clip, by inserting a suitable flat-bladed tool to the front edge and lift upward.
Remove the outer belt sealing strip from the door.

Install the outer belt sealing strip to the door. Insert the retaining clip for the outer belt sealing strip into the front hole of the door and push down firmly to lock in place. Install the outer belt sealing strip to pinch-weld flange.
Install the outer belt sealing strip screw (2). Tighten: Tighten the screw to 2 N.m (18 lb in).
Install the outside rearview mirror. Refer to «Mirror Replacement - Power»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the window for proper operation.
Remove the masking.

Apply masking tape to the door frame and applique.
Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Lower the window to the full down position.
Remove the outer belt sealing strip screw.
Release the outer belt sealing strip clip, by inserting a suitable flat-bladed tool to the rear edge and lift upward.
Remove the outer belt sealing strip from the door.

Install the outer belt sealing strip to the door. Insert the retaining clip for the outer belt sealing strip into the rear hole of the door and push down firmly to lock in place.
Install the outer belt sealing strip screw. Tighten: Tighten the screw to 2 N.m (18 lb in).
Remove the masking tape.
Inspect the window for proper operation.
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Lower the window to the full down position.
Remove the window belt inner sealing strip by lifting it off the pinch-weld flange.

Position the window belt inner sealing strip to the door flange. Engage each end of the window belt inner sealing strip by pressing firmly onto the front and the rear ends of the pinch-weld flange.
Firmly seat the entire length of the sealing strip.
Inspect the window for proper operation.
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Lower the window to the full down position.
Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Lift the rear door window inner belt sealing strip off the pinch-weld flange.
Remove the inner window belt sealing strip from the door.

Position the window belt inner sealing strip to the door flange.
Engage each end of the window belt inner sealing strip by pressing firmly onto the front and the rear ends of the pinch-weld flange.
Use hand pressure in order to firmly seat the rear door window inner belt sealing strip on the pinch-weld flange.
Inspect the door for proper operation.
Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .

Open the front door.
Remove the trim panel lower center pillar. Refer to «Trim Panel Replacement - Lower Center Pillar»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Remove the weatherstrip by pulling it off the pinch-weld flange.
Remove the weatherstrip from the door opening.

Position the door weatherstrip to the door opening.
Install the weatherstrip to the pinch-weld flange on the body.
Install the trim panel lower center pillar. Refer to «Trim Panel Replacement - Lower Center Pillar»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Inspect the door for proper operation.
Close the front door.

Open the door.
Lower the window to the full down position.
Grasp the window weatherstrip in the center. Pull downward until the window weatherstrip fully releases from the door frame.
Remove the window weatherstrip from the front door.

Position the window weatherstrip to the door starting in the corner.
Firmly seat the window weatherstrip to the door, working out in both directions.
Inspect the window to ensure the weatherstrip is properly positioned.
Inspect the window for proper operation.
Close the door.

Open the rear door.
Lower the window to the full down position.
Grasp the door window weatherstrip in the center. Pull downward until the weatherstrip fully releases from the door frame.
Remove the window weatherstrip from the door.

Install the window weatherstrip to the door
Position the window weatherstrip to the window opening. Starting in the corners, position the window weatherstrip to the pinch-weld flange of the door frame. Working outward in both directions fitting the window weatherstrip.
Inspect the operation of the window to ensure that the weatherstrip is properly positioned to the door frame.
Close the rear door.

Open the rear door.
Remove the lower center pillar trim. Refer to «Trim Panel Replacement - Lower Center Pillar»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Remove the rear quarter lower trim. Refer to «Trim Panel Replacement - Rear Quarter Lower»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Remove the weatherstrip. Starting in the center bottom of the weatherstrip, pull the weatherstrip upward and away from the pinch-weld flange.
Remove the weatherstrip from the door opening.

Install the weatherstrip to the door opening. Start in the center bottom of the pinch-weld flange. Push the weatherstrip and retainers on the flange. Ensure that the weatherstrip and retainers are fully seated on the flange before installing the rear carpet retainer.
Install the lower center pillar trim. Refer to «Trim Panel Replacement - Lower Center Pillar»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Install the rear quarter lower trim. Refer to «Trim Panel Replacement - Rear Quarter Lower»(/buick/lacrosse/i-2004-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
Inspect the door for proper operation.
Close the door.

Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Interior Trim.
Disconnect the electrical connector from the outside rearview mirror.
Remove the outside rearview mirror nuts.
Remove the outside rearview mirror from the door.

Install the outside rearview mirror to the door.
Install the outside rearview mirror nuts. Tighten: Tighten the nuts to 10 N.m (89 lb in).
Connect the electrical connector to the outside rearview mirror.
Install the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the mirror for proper operation.

Remove the mirror face (1). Refer to «Mirror Face Replacement»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Remove the screw from the mirror motor (2).
Disconnect the electrical connector from the edge of the mirror motor. Note the position of the plugs on the mirror motor when removing.
Remove the motor.

Position the motor to the mirror housing.
Connect the electrical connector to the edge of the mirror motor.
Install the screw to the mirror motor. Tighten: Tighten the screws to 2 N.m (18 lb in).
Install the mirror face to the mirror housing. Refer to «Mirror Face Replacement»(/buick/lacrosse/i-2004-2009/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) .
Inspect the mirror for proper operation.

Carefully push the mirror face toward the front of the car and downward on the inner edge, near the front door window glass, to allow access.
Grasp the mirror face back and firmly pull it away from the mirror motor and housing. It will be necessary to use a sharp jerking motion to release it from the housing.
Lift the mirror back up and out to release the lower tabs.
Disconnect the heated mirror wires, if equipped.

Connect the heated mirror wires, if equipped.
Using the palm of your gloved hand, press firmly on the center of the glass until the case seats onto the motor. The mirror will make a snapping noise when properly seated.
Inspect the mirror for proper operation.

Power Windows

The power window system consists of the following components

Driver window switch
Front passenger window switch
Left rear window switch
PWR WDO Circuit Breaker 25-amp
Right rear window switch
Window regulator motors in each of the doors

Driver Window Switch

When the ignition switch is in the RUN or ACCY position or retained accessory power (RAP) is enabled, battery positive voltage is supplied from the PWR WDO circuit breaker to the driver window switch. Ground for the switch is provided by G302. When the window switch is pressed in the DOWN position, battery positive voltage is applied to the driver window motor down circuit and ground is applied to the driver window motor up circuit causing the window to open. When the driver window switch is pressed in the UP position, the polarity is reversed, battery positive voltage and ground are applied to the opposite circuits and the window closes. In order to control the passenger windows from the driver door, the driver window switch assembly contains a separate window switch for each passenger door window. These window switches operate in the same way as the driver window switch, except that the applied battery positive voltage and ground must also pass through the passenger window switch to get to the passenger window motor.

Express Down Feature

The driver window will travel to the fully down position when the driver window switch is pressed past the first DOWN detent. Pressing the switch to the full DOWN position or to the UP position or will cancel the express down feature.

Lockout Switch Feature

The driver window switch contains a rear window lockout switch which disconnects the battery positive voltage supply to the rear passenger door window switches, disabling them. The front passenger door window switch cannot be locked out.

Front Passenger Window Switch

When the ignition switch is in the RUN or ACCY position or retained accessory power (RAP) is enabled, battery positive voltage is supplied from the PWR WDO circuit breaker to the front passenger window switch. Ground is applied from G302 through the driver window switch to the front passenger power window switch. When the front passenger power window switch is pressed to the DOWN position, battery positive voltage is applied to the window motor down circuit and ground is applied to the window motor up circuit, causing the window to open. When the window switch is pressed in the UP position, the polarity is reversed, battery positive voltage and ground are applied to the opposite circuits and the window closes.

Rear Passenger Window Switches

When the ignition switch is in the RUN or ACCY position or retained accessory power (RAP) is enabled, battery positive voltage is supplied from the PWR WDO circuit breaker through the driver window switch to the power window master switch lockout signal circuit, to each rear window switch. Ground is applied from G302 through the driver window switch to each of the rear power window switches. When a rear power window switch is pressed to the DOWN position, battery positive voltage is applied to the window motor down circuit and ground is applied to the window motor up circuit, causing the window to open. When the window switch is pressed in the UP position, the polarity is reversed, battery positive voltage and ground are applied to the opposite circuits and the window closes.

Power Door Locks

The power door locks system consists of the following components

Body control module (BCM)
Driver door lock switch
Front passenger door lock switch
Driver lock cylinder switch
Door lock actuators in each of the doors
DR LK/TRUNK 15-amp fuse

For door lock operation, the instrument panel (I/P) fuse block supplies battery positive voltage, through the 15-amp DR LK/TRUNK fuse, to the BCM. The BCM uses this circuit exclusively to apply power to the door lock actuators. The BCM is also supplied a ground circuit from G301, which it uses to ground the door lock actuators. When a door lock switch is activated, the BCM internally connects these 2 circuits to the appropriate lock and unlock control circuits to actuate the locking or unlocking functions.

Power Door Lock Controls

The power door lock system is controlled by the BCM and can be activated by anyone of the following

A door lock switch LOCK or UNLOCK actuation
A door lock cylinder switch LOCK/UNLOCK actuation
A keyless entry transmitter actuation
An OnStar® UNLOCK actuation
An automatic door LOCK actuation-Refer to «Vehicle Personalization»(/buick/lacrosse/i-2004-2009/remont/memory-modules/#personalization-systems) in Personalization.
An automatic door UNLOCK actuation-Refer to «Vehicle Personalization»(/buick/lacrosse/i-2004-2009/remont/memory-modules/#personalization-systems) in Personalization.
A last door closed locking (LDCL) actuation-Refer to «Vehicle Personalization»(/buick/lacrosse/i-2004-2009/remont/memory-modules/#personalization-systems) in Personalization.

Door Lock Operation

When the BCM detects a transition of either of the door lock switches to the LOCK position, it switches the door lock actuator lock control circuit to battery positive voltage. The door lock actuators transition to the LOCK position. The lock actuator unlock control circuits are grounded within the BCM.

Driver Door Unlock Operation

When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the driver door lock actuator unlock control circuit to battery positive voltage. The driver door lock actuator transitions to the UNLOCK position. The lock actuator unlock control circuits are grounded within the BCM. The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator. This is done so that the driver door may be unlocked individually before unlocking the passenger doors using a keyless entry transmitter or an automatic door unlock function, if programmed.

Passenger Door Unlock Operation

When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the door lock actuator unlock control circuits to battery positive voltage. The passenger door lock actuators transition to the UNLOCK position. The lock actuator unlock control circuits are grounded within the BCM. When the keyless entry transmitter is used to unlock the passenger doors, the BCM requires a repeated unlock command before it performs the unlock function. However, when the unlock input is from a door lock switch, a single unlock command is all that is required to unlock all doors.

Automatic Door Lock/Unlock

The automatic door lock or unlock function is a vehicle personalization feature with the following 4 programmable modes of operation

The automatic door lock feature is disabled.
All of the doors lock when the vehicle is shifted with the ignition ON.
All of the doors lock when the vehicle is shifted out of PARK with the ignition ON and all of the doors unlock with the key out of the ignition.
All of the doors lock when the vehicle is shifted with the ignition ON and all of the doors unlock when the vehicle is shifted into PARK.

The automatic door lock function can only be enabled by the BCM if the driver door switch is in the inactive state, meaning the door is closed. For information on programming the automatic door locks, refer to Vehicle Personalization in Personalization.

Auto Door Relock

Auto door relock is enabled if the doors are opened and closed or the power door lock switch is activated to unlock the doors. The doors will relock when the vehicle speed is greater then 5 mph.

Lockout Prevention

This function is intended to prevent the vehicle operator from locking the doors if the key is left in the ignition. The lockout prevention function can be overridden by the BCM if the BCM receives a door lock input for longer than 3 seconds.

Last Door Closed Locking (LDCL)

The LDCL function is a Vehicle Personalization feature that is intended to allow the doors to be locked while passengers are exiting the vehicle. When LDCL is in Active Mode, the BCM will delay locking of the vehicle doors for 5 seconds after all of the doors have been closed. The LDCL function will be cancelled if the BCM receives a door unlock input, a key in ignition input or if the lock button is pressed twice.

Key Cylinder Lock

The BCM will lock all of the doors immediately upon detecting a door lock cylinder switch in the LOCK position. The BCM supplies battery positive voltage, through the door lock key switch lock signal circuit, to the door lock cylinder switch. The door lock cylinder switch is grounded at G301 for the driver door lock switch and at G302 for the passenger door lock. When the door lock cylinder switch is activated to the LOCK function, the normally open contacts of the two circuits are closed and the BCM interprets the voltage signal as a lock doors input.

Key Cylinder Unlock

The BCM will unlock all of the doors after detecting a door lock cylinder switch in the UNLOCK position for greater than 1 second. The BCM supplies battery positive voltage, through the door lock key switch unlock signal circuit, to the door lock cylinder switch. The door lock cylinder switch is grounded at G301 for the driver door lock switch and at G302 for the passenger door lock. When the door lock cylinder switch is activated to the UNLOCK function, the normally open contacts of the two circuits are closed and the BCM interprets the voltage signal as a unlock doors input.

Door Ajar Indicator

The door ajar indicator system consists of the following components

Body control module (BCM)
Door ajar switch each of the doors
Rear compartment lid ajar switch
Instrument panel cluster (IPC)

Each door lock contains a door ajar switch. The door ajar switches are an integral part of each door lock and are not serviced separately. The BCM supplies battery positive voltage to each door ajar switch. Ground for the driver door and left rear ajar switches is provided by G301. Ground for the right front, right rear passenger and the rear compartment lid ajar switches is provided by G302. When the doors are closed, the ajar switch contacts of each door are open. When a vehicle door is ajar, the ajar switch contacts for that door are closed and the BCM interprets the flow of voltage as a discrete input from the door ajar switch. The BCM then sends the request to illuminate the corresponding door ajar indicator, through the class 2 serial data circuit to the IPC. The IPC illuminates the appropriate door ajar indicator.

Power Mirrors

The power mirror system consists of the following components

Outside rearview mirror switch
Mirror selector switch
Left outside rearview mirror
Right outside rearview mirror
PWR MIR Fuse 10A

Each of the outside rearview mirrors contains two motors. The vertical motor operates the mirror in the up and down directions and the horizontal motor operates the mirror in the left and right directions. Each of the outside rearview mirror motors are circuit breaker protected. The outside rearview mirror switch is a four position directional switch: Up, Down, Left and Right. The mirror select switch is a three position switch: L for left, Off for none and R for right.

Power Mirror System Operation

The outside rearview mirror switch receives power through the battery positive voltage circuit from the PWR MIR 10A Fuse. The power mirror switch also receives a ground from G301. The four positions of the direction switch have dual switch contacts. Each of the contacts are connected to opposing sides of the appropriate power mirror motors through the selector switch. The selector switch completes these circuits depending on the position of the selector switch, L or R.

If the selector switch is placed in the L position and the up switch is depressed, battery positive voltage will be supplied to the left outside rearview mirror vertical motor through the left mirror motor down control circuit and ground through the left mirror motor left control circuit. If the down switch is depressed, battery positive voltage will be supplied to the left outside rearview mirror vertical motor through the left mirror motor left control circuit and ground through the left mirror motor down control circuit.

The remainder of the mirror functions operate in the same manner as described above. Placing the power mirror switch in opposing positions, left/right or up/down, will reverse the polarity to the mirror motor, reversing the direction of movement.

Heated Mirrors

Battery positive voltage is applied at all times to the coil and switch side of the rear window defogger relay. When the rear defogger switch is placed in the ON position, a class 2 signal circuit is sent to the body control module (BCM). The BCM then applies a ground to the rear window defogger relay. This energizes and allows battery positive voltage to be applied through the HTD MIRROR fuse to the heated mirrors. The ground for the driver side heated mirror is supplied from G301 and for the passenger heated mirror from G302.

Special Tools

Special Tools Illustration Tool Number/Description J 36604 Door Hinge Spring Compressor J 38778 Door Trim Pad Clip Remover

Scheme 11

Scheme 11: Special Tools

Scheme 12

Door System, Mirror System & Window System Buick LaCrosse I

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Power Door Systems Connector End Views

Diagnostic Starting Point - Doors

Scan Tool Output Controls

Scan Tool Data List

Symptoms - Doors

Visual/Physical Inspection

Intermittent

Symptom List

Test Description

Power Windows Inoperative - One or Both Rear Windows

Power Windows Inoperative - Express Down Function

Power Window Inoperative - Driver Door

Power Window Inoperative - Passenger Door

Door Ajar Indicator Malfunction

Diagnostic Aids

Power Door Locks Inoperative - Key Cylinder Switches

Power Door Lock Inoperative - Driver Door

Power Door Locks Inoperative - Passenger Door

Heated Mirrors Inoperative

Removal Procedure

Installation Procedure

Tools Required

Up/Down or In/Out Adjustment

Fore/Aft Adjustment

Lock Actuator Replacement - Front Door

Lock Actuator Replacement - Rear Door

Frozen Lock Cylinder Repair

Lock Striker Adjustment - Door

Causes of Slow Moving Window

Scheme 10

Adjustment Procedure

Power Windows

Driver Window Switch

Express Down Feature

Lockout Switch Feature

Front Passenger Window Switch

Rear Passenger Window Switches

Power Door Locks

Power Door Lock Controls

Door Lock Operation

Driver Door Unlock Operation

Passenger Door Unlock Operation

Automatic Door Lock/Unlock

Auto Door Relock

Lockout Prevention

Last Door Closed Locking (LDCL)

Key Cylinder Lock

Key Cylinder Unlock

Door Ajar Indicator

Power Mirrors

Power Mirror System Operation

Heated Mirrors

Special Tools

Scheme 11

Scheme 12

More articles — Accessories & Equipment

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