Fixed & Moveable Window Systems: Other GMC Sierra 2500 HD

Defogger Grid X2 (C49)

Defogger Grid X2 (C49) Connector Parts Information

Defogger Grid X2 (C49) Connector Terminal Identification

Scheme 47

Sliding Rear Window - Switch (A48) Connector Parts Information

Sliding Rear Window - Switch (A48) Connector Terminal Identification

Scheme 48

Sliding Rear Window Close Relay (A48) Connector Parts Information

Sliding Rear Window Close Relay (A48) Connector Terminal Identification

Scheme 49

Sliding Rear Window Motor (A48) Connector Parts Information

Sliding Rear Window Motor (A48) Connector Terminal Identification

Sliding Rear Window Open Relay (A48)

Sliding Rear Window Open Relay (A48) Connector Parts Information

Sliding Rear Window Open Relay (A48) Connector Terminal Identification

Window Motor - Driver (A31)

Window Motor - Driver (A31) Connector Parts Information

Window Motor - Driver (A31) Connector Terminal Identification

Window Motor - Left Rear (Crew Cab +A31/Extended Cab +ABV)

Window Motor - Left Rear (Crew Cab +A31/Extended Cab +ABV) Connector Parts Information

Window Motor - Left Rear (Crew Cab +A31/Extended Cab +ABV) Connector Terminal Identification

Window Motor - Passenger (A31)

Window Motor - Passenger (A31) Connector Parts Information

Window Motor - Passenger (A31) Connector Terminal Identification

Window Motor - Right Rear (Crew Cab +A31/Extended Cab +ABV)

Window Motor - Right Rear (Crew Cab +A31/Extended Cab +ABV) Connector Parts Information

Window Motor - Right Rear (Crew Cab +A31/Extended Cab +ABV) Connector Terminal Identification

Scheme 50

Window Switch - Driver X1 (A31 -AN3/DL3) Connector Parts Information

Window Switch - Driver X1 (A31 -AN3/DL3) Connector Terminal Identification

Scheme 51

Window Switch - Driver X2 (A31 -AN3/DL3) Connector Parts Information

Window Switch - Driver X2 (A31 -AN3/DL3) Connector Terminal Identification

Window Switch - Left Rear (Crew Cab +A31/Extended Cab +ABV)

Window Switch - Left Rear (Crew Cab +A31/Extended Cab +ABV) Connector Parts Information

Window Switch - Left Rear (Crew Cab +A31/Extended Cab +ABV) Connector Terminal Identification

Window Switch - Passenger (A31 -AN3/DL3)

Window Switch - Passenger (A31 -AN3/DL3) Connector Parts Information

Window Switch - Passenger (A31 -AN3) Connector Terminal Identification

Window Switch - Right Rear (Crew Cab +A31/Extended Cab +ABV)

Window Switch - Right Rear (Crew Cab +A31/Extended Cab +ABV) Connector Parts Information

Window Switch - Right Rear (Crew Cab +A31/Extended Cab +ABV) Connector Terminal Identification

Reference Information

Schematic Reference

Defogger Schematics

Connector End View Reference

Window Systems Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

DTC Type Reference

DTC Symptom Description

Scan Tool Reference

Scan Tool Data List

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for HVAC control module replacement, programming, and setup

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Front Side Door Window Regulator Motor Replacement»(ref-278004-S37682793492008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for driver or passenger door lock and side window switch replacement

Schematic Reference

Moveable Window Schematics

Connector End View Reference

1. «Vehicle Access Connector End Views»(ref-278003-S40313736022008012100000)
2. «Data Communication Connector End Views»(ref-278002-S06109933032008012100000)

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup.

Schematic Reference

Moveable Window Schematics

Connector End View Reference

1. «Vehicle Access Connector End Views»(ref-278003-S40313736022008012100000)
2. «Data Communication Connector End Views»(ref-278002-S06109933032008012100000)

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup.

Schematic Reference

Moveable Window Schematics

Connector End View Reference

1. «Vehicle Access Connector End Views»(ref-278003-S40313736022008012100000)
2. «Data Communication Connector End Views»(ref-278002-S06109933032008012100000)

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup.

Schematic Reference

Moveable Window Schematics

Connector End View Reference

1. «Vehicle Access Connector End Views»(ref-278003-S40313736022008012100000)
2. «Data Communication Connector End Views»(ref-278002-S06109933032008012100000)

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup.

Schematic Reference

Moveable Window Schematics

Connector End View Reference

1. «Vehicle Access Connector End Views»(ref-278003-S40313736022008012100000)
2. «Data Communication Connector End Views»(ref-278002-S06109933032008012100000)

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup.

Schematic Reference

Moveable Window Schematics

Connector End View Reference

1. «Vehicle Access Connector End Views»(ref-278003-S40313736022008012100000)
2. «Data Communication Connector End Views»(ref-278002-S06109933032008012100000)

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup.

Symptoms - Fixed and Moveable Windows

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) 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.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following system descriptions: «Power Windows Description and Operation (Side Windows)»(ref-278004-S17285655022008012100000) «Power Windows Description and Operation (Rear Window)»(ref-278004-S07441282302008012100000) «Rear Window Defogger Description and Operation»(ref-278004-S12336574192008012100000)

Intermittent

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

Schematic Reference

Defogger Schematics

Connector End View Reference

Window Systems Connector End Views

Description and Operation

Rear Window Defogger Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
2. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Window Replacement»(ref-278004-S06123557982008012100000)
2. «Control Module References»(ref-278020-S09054666032008012100000) for HVAC control module replacement, programming, and setup

Schematic Reference

Moveable Window Schematics

Connector End View Reference

Window Systems Connector End Views

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Circuit/System Verification

Verify that the Retained Accessory Power (RAP) circuit is functioning normally.

1. If the RAP is not functioning normally refer to «Symptoms - Wiring Systems»(ref-278019-S20043293472008012100000) .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Door Lock Replacement (Crew Cab)»(ref-278003-S12741808252008012100000) or «Rear Door Lock Replacement (Extended Cab Lower)»(ref-278003-S11888292252008012100000) or «Rear Door Lock Replacement (Extended Cab Upper)»(ref-278003-S42665218352008012100000)
2. «Instrument Panel Electrical Center or Junction Block Replacement - Left Side»(ref-278007-S10555697572008012100000)
3. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, programming, and setup

Schematic Reference

Moveable Window Schematics

Connector End View Reference

Window Systems Connector End Views

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data Definitions»(ref-278004-S18322719722008012100000)
2. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
3. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

1. Observe the operation of the power windows while using their respective window switches, each window should perform the UP and DOWN command. If the driver window fails the UP/DOWN operation, refer to «Driver Window Malfunction»(ref-278004-S14676675982008012100000) . If the front passenger window fails the UP/DOWN operation, refer to «Passenger Window Malfunction»(ref-278004-S35905165732008012100000) . If a rear door window fails the UP/DOWN operation, refer to «Rear Door Window Malfunction»(ref-278004-S35905165732008012100000) .
2. Disable the rear window switches by activating the window lockout switch on the driver master control. The rear window switches should be inoperative. If the rear window switches are still active, refer to «Window Lockout Switch Malfunction»(ref-278004-S35905165732008012100000) .
3. Observe the operation of the power passenger windows while using the window switches on the driver master control. Each passenger window should perform the UP and DOWN command. If a window fails the UP/DOWN operation, refer to «Driver Master Control Malfunction»(ref-278004-S35905165732008012100000) .

Driver Master Control Malfunction

Ignition ON, observe the scan tool Driver Window Switch parameters while using the appropriate power window switch on the driver master control. The reading should change between OFF/UP/DOWN/EXPRESS.

1. If the scan tool Driver Window Switch parameter is always OFF, replace the DDS.
2. If the scan tool Driver Window Switch parameter is always UP, DOWN or EXPRESS, replace the DDS.

Passenger Window Malfunction

1. Ignition OFF, disconnect the harness connector C1 at the PDS.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance.
3. Ignition OFF, reconnect the harness connector C1 at the PDS and disconnect the harness connector at the passenger window motor.
4. Connect a test lamp between control circuit terminal A and control circuit terminal B.
5. Ignition ON, command the passenger window UP and DOWN by using the passenger window switch. The test lamp should turn ON when commanding the UP and DOWN states. If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the PDS.
6. If all circuits test normal, test or replace the passenger window motor.

Rear Door Window Inoperative

1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal F and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal G and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Connect a test lamp between the power window switch rear down signal circuit terminal C and ground.
5. Command the appropriate rear window DOWN with a scan tool, the test lamp should illuminate during the DOWN command. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
6. Connect a test lamp between the power window switch rear up signal circuit terminal A and ground.
7. Ignition ON, command the appropriate rear window UP with a scan tool, the test lamp should illuminate during the UP command. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
8. Ignition OFF, reconnect the appropriate rear window switch.
9. Ignition OFF, disconnect the harness connector at the appropriate rear window motor.
10. Connect a test lamp between control circuit terminal A and control circuit terminal B.
11. Ignition ON, command the appropriate rear window UP and DOWN by using the appropriate rear window switch. The test lamp should turn ON when commanding the UP and DOWN states. If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the appropriate rear window switch.
12. If all circuits test normal, test or replace the appropriate rear window motor.

Window Lockout Switch Malfunction

1. Ignition ON, observe the scan tool Window Lockout Switch parameter while pressing the window lockout switch on the driver master control. The reading should change between ON and OFF. If the scan tool Window Lockout Switch parameter is always OFF, replace the DDS. If the scan tool Window Lockout Switch parameter is always ON, replace the DDS.
2. Ignition OFF, disconnect the Power Window Lockout Rear control circuit at the appropriate rear window switch.
3. Ignition ON, connect a test lamp between the Power Window Lockout Rear Control circuit terminal D and ground.
4. Command the rear window lockout ON and OFF by pressing the lockout switch on the driver master control. The test lamp should go ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to B+, if the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Regulator Motor Replacement (Crew Cab)»(ref-278004-S40738455382008012100000) or «Rear Side Door Window Regulator Motor Replacement (Extended Cab)»(ref-278004-S11506582372008012100000)
2. «Front Side Door Window Regulator Motor Replacement»(ref-278004-S37682793492008012100000)
3. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
4. «Control Module References»(ref-278020-S09054666032008012100000) for BCM replacement, setup and programming

Schematic Reference

Moveable Window Schematics

Connector End View Reference

Window Systems Connector End Views

Description and Operation

Power Windows Description and Operation (Side Windows) or Power Windows Description and Operation (Rear Window)

Electrical Information Reference

1. «Circuit Testing»(ref-278019-S01379251932008012100000)
2. «Connector Repairs»(ref-278019-S06982211772008012100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-278019-S21810776732008012100000)
4. «Wiring Repairs»(ref-278019-S25320832652008012100000)

Scan Tool Reference

1. «Scan Tool Data Definitions»(ref-278004-S18322719722008012100000)
2. «Scan Tool Data List»(ref-278004-S09026990992008012100000)
3. «Scan Tool Output Controls»(ref-278004-S42708526192008012100000)

1. Ignition ON, command the appropriate door window UP and DOWN by using the appropriate window switch. Observe the operation of the appropriate door windows. If the front driver door window is inoperative, refer to «Driver Power Window Inoperative»(ref-278004-S07566868062008012100000) . If the front passenger door window is inoperative, refer to «Passenger Power Window Inoperative»(ref-278004-S07566868062008012100000) . If the left rear or right rear door window is inoperative, refer to «Rear Power Window Inoperative»(ref-278004-S07566868062008012100000) .
2. Disable the rear window switches by activating the window lockout switch on the driver master control. The rear window switches should be inoperative. If the rear window switches are still active, refer to «Window Lockout Switch Malfunction»(ref-278004-S07566868062008012100000) .
3. Command the express down and express up functions of the driver door window by pressing down on the drivers window switch past the first detent and releasing. The driver's window should roll completely down and completely up. If the drivers window fails to roll completely down, replace the driver window switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Side Door Window Switch Replacement (Extended Cab)»(ref-278004-S32825625692008012100000) or «Rear Side Door Window Switch Replacement (Crew Cab)»(ref-278004-S24887392842008012100000)
2. «Front Side Door Window Regulator Motor Replacement»(ref-278004-S37682793492008012100000)

Power Window System Components

The power window system consists of the following components

1. Driver door switch (DDS)
2. Passenger door switch (PDS)
3. Body control module (BCM)
4. Rear door power window switches
5. Power window motors in each of the doors (circuit breaker protected)

Power Window System Controls

The power window system will operate anytime the Retained Accessory Power (RAP) system is active or when the ignition switch is in the ACCY or ON position.

The driver and passenger door lock and side window switches are integrated control module switch assemblies. The DDS driver and front passenger window switches are normally open, 3 position rocker type switches, with detents for up, down, and express down. The DDS rear passenger window switches are normally open, 2 position rocker type switches, with detents for up and down. The DDS rear window lockout switch is a push button type switch that provides an active signal to the DDS whenever pressed. Whenever the rear window lockout switch is pressed the DDS will activate or deactivate the rear window lockout function depending on the current state, and illuminate the switch indicator whenever the function is active.

The passenger door switch (PDS) contains a single power window switch that is an integral component. Closing of this normally open, rocker switch provides the PDS with a request for the front passenger power window operation. The switch for the front passenger window has 3 positions UP, Down and Express Down. Each of these switch positions is a direct input to the PDS.

The rear passenger door power window switches are normally open, 2 position rocker type switches, with detents for up and down. Each switch incorporates up and down window motor relays that can be energized by the rocker switch or through BCM control circuits.

Rear Window Defogger System Components

The rear window defogger system consist of the following components

1. Heating Ventilation Air Conditioning control module
2. Body control module (BCM)
3. DEFOG relay
4. Rear window that has a number of grid lines