Shift Interlock Systems Chevrolet Impala VIII

DESCRIPTION & OPERATION

INTRODUCTION

The automatic transmission (A/T) shift lock control system is a safety device that prevents an inadvertent shift out of Park when the engine is running. The driver must press the brake pedal before moving the shift lever out of the Park position. The system consists of the following components

1. A/T shift lock solenoid (also known as "actuator", "shift lock solenoid" or "BTSI solenoid").
2. A/T shift lock control switch (part of stoplamp switch).
3. Body Control Module (BCM).
4. Powertrain Control Module (PCM).

With the ignition switch in the ON position, battery voltage is supplied to the stoplamp switch. The circuit continues through the normally closed switch to the A/T shift lock solenoid. The BCM provides a ground for the A/T shift lock solenoid when the transmission is in Park. The BCM receives the transmission gear position information via class 2 serial data from the PCM. This causes the A/T shift lock solenoid to energize and lock the shift lever in the Park position. When the driver presses the brake pedal, the contacts in the stoplamp switch open. This causes the A/T shift lock solenoid to release. This allows the shift lever to move from the Park position. The BCM turns off the A/T shift lock solenoid ground circuit when the transmission is out of Park.

STEERING COLUMN ELECTRIC PARK LOCK

If the vehicle is equipped with a floor-mounted console gear shifter, an added safety feature is an electric park lock system in the steering column. The electric park lock system prevents the steering wheel from being locked when the transmission is in gear and the vehicle may be moving. The column ignition lock system consists of a steering column electric park lock and a park position switch, that is located in the stoplamp switch. The park key lock actuator contains a spring-loaded pin that mechanically prevents the ignition key cylinder from being turned to the Lock position when the transmission is not in the Park position. If vehicle power is lost or the transmission is not in the Park position, the operator will not be able to turn the ignition key to the Lock position and will not be able to remove the ignition key from the column. For servicing, see appropriate STEERING article in STEERING COLUMNS.

PARK LOCK CABLE

Gearshift lever is locked in Park position when ignition switch is in LOCK position. When ignition switch is turned to ON position, gearshift lever is allowed movement to desired position by park lock cable. Ignition key cannot be removed until gearshift lever is returned to Park position.

SHIFT INTERLOCK SOLENOID

Gearshift lever cannot be moved from Park position without simultaneously applying brake pedal with ignition switch in ON position. When brake pedal is applied, brakelight switch completes or interrupts circuit to BTSI solenoid. Depending upon application, energizing or de-energizing BTSI solenoid unlocks gearshift lever from Park position. See WIRING DIAGRAMS .

DIAGNOSTIC STARTING POINT

Begin the system diagnosis with the DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. The diagnostic system check will provide the following information

1. The identification of the control module(s) which command the system.
2. The ability of the control module(s) to communicate through the serial data circuit.
3. The identification of any stored Diagnostic Trouble Codes (DTC) 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. If no shift interlock system DTCs are present, attempt diagnosis by symptom. See SYMPTOM DIAGNOSIS .

SYMPTOM DIAGNOSIS

Note. Review the system operation in order to familiarize yourself with the system functions. See DESCRIPTION & OPERATION .

Visual/Physical Inspection

Inspect for aftermarket devices which could affect the operation of the auto trans shift lock control system. Inspect easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittents

Intermittent faulty electrical connections or wiring may be the cause of intermittent conditions. Check for loose, bent or corroded terminals and terminal tension. Check for cut, bare or pinched wiring. Simulate the condition that is potentially causing the intermittent connection, either by wiggling the connections or the wiring, test driving or performing other operations while observing scan tool, DVOM or other testing equipment.

Symptom List

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

1. Shift Lever Does Not Move With Brake Pedal Depressed
2. Shift Lever Can Be Moved Without Brake Pedal Depressed

See appropriate test under SYMPTOM TESTS .

Test Description

The numbers below refer to the step numbers in the diagnostic procedure.

1. 2 Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 4 Checks for DTCs in the BCM and the PCM.
3. 5 The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Diagnostic Procedure

1. Connect scan tool to the DLC. The DLC is located on lower left side of instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, diagnose scan tool concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
2. Turn ignition switch to RUN position. Attempt to establish communication with the BCM or PCM. Does the scan tool communicate with the BCM or PCM? If so, go to next step. If not, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. NOTE: If vehicle is a 2001 model year, go to step 4 . If vehicle is a 2002 model year, go to next step.
3. Access the IGNITION SWITCH parameter in the BCM inputs data display list. Rotate the ignition switch through all positions while observing the ignition switch power mode parameter. Does the ignition switch parameter reading match the ignition switch position for all switch positions? If so, go to next step. If not, check for power mode mismatch concern. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
4. Select the BCM and PCM display DTCs function on the scan tool. Does the scan tool display any DTCs? If so, go to next step. If not, attempt diagnosis by symptom. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING.
5. If "U" series DTCs (communication DTCs) are not retrieved, go to next step. If "U" series DTCs are retrieved, diagnose body control system. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT.
6. Does the scan tool display DTC B1000? If so, See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If not, go to next step.
7. Does the scan tool display DTC P1819, P1820, P1822, P1823 or P1825? If so, diagnose DTCs as necessary. See appropriate DIAGNOSIS article. If not, go to next step.
8. Does the scan tool display DTC B2712 or B3713 ? If so, see «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__diagnostic-trouble-code-definitions) . If not, attempt diagnosis by symptom. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DIAGNOSTIC TROUBLE CODE DEFINITIONS

CLEARING DIAGNOSTIC TROUBLE CODES

DTCs can be cleared with a scan tool. Follow scan tool manufacturer's instructions.

DIAGNOSTIC TESTS

DTC B2712

Note. For circuit reference, see CONNECTOR IDENTIFICATION and WIRING DIAGRAMS .

Circuit Description

The BCM controls the A/T shift lock solenoid ground circuit and monitors the voltage of the ground control circuit.

Conditions for Running the DTC

The control ground circuit of the A/T shift lock solenoid must be OFF.

Conditions For Setting DTC

1. The BCM detects the controlled ground circuit voltage is approximately equal to ground in the OFF state.
2. The condition above must be present for more than 0.3 second.
3. This DTC will set after 20 seconds due to possible false failures.

Action Taken When DTC Sets

The BCM stores DTC B2712 in memory.

Conditions For Clearing DTC

1. A current DTC B2712 will clear if the short to ground or open in the controlled ground circuit of the shift lock control solenoid is no longer detected by the BCM.
2. A history DTC B2712 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
3. A scan tool may be used to clear the DTC.

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

1. 2 Listen for an audible click when the A/T shift lock solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3 Tests for voltage at the A/T shift lock solenoid.
3. 4 Verifies that the body control module (BCM) is providing ground to the A/T shift lock solenoid.
4. 5 Tests if ground is constantly being applied to the A/T shift lock solenoid.
5. 16 The body control module must be programmed for the vehicle RPO configuration.

1. Did you perform the diagnostic system check? If so, go to next step. If not, see «DIAGNOSTIC SYSTEM CHECK»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under SELF-DIAGNOSTIC SYSTEM.
2. Install a scan tool. Turn ignition switch to RUN position. With a scan tool, command the BRAKE TO SHIFT output ON and OFF. Does the A/T shift lock solenoid turn ON and OFF with each command? If so, check for intermittent condition. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING. If not, go to next step.
3. Turn ignition switch to the OFF position. Disconnect the shift lock solenoid. Turn the ignition switch to the ON position. Connect a test light between ground and the shift lock solenoid supply voltage circuit (Dark Green/White wire) at the solenoid. Does the test light illuminate? If so, go to next step. If not, go to step 8 .
4. Connect a test light between the shift lock solenoid control circuit (Tan/White wire) at the shift lock solenoid and the shift lock solenoid voltage supply circuit (Dark Green/White wire) at the shift lock solenoid. With a scan tool, command the shift lock solenoid ON and OFF. Does the test light turn ON and OFF with each command? If so, go to step 11 . If not, go to next step.
5. Does the test light remain illuminated with each command? If so, go to step 7 . If not, go to next step.
6. Test the shift lock solenoid control circuit (Tan/White wire) for an open. Did you find and correct the condition? If so, go to step 17 . If not, go to step 12 .
7. Test the shift lock solenoid control circuit (Tan/White wire) for a short to ground. Did you find and correct the condition? If so, go to step 17 . If not, go to step 12 .
8. Turn ignition switch to the OFF position. Connect a test light between ground and the ignition feed circuit (Pink wire) at the stoplamp switch. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to next step. If not, go to step 13 .
9. Test the shift lock solenoid voltage supply circuit (Dark/Green White wire) for an open or short to ground. Did you find and correct the condition? If so, go to step 17 . If not, go to next step.
10. Inspect for proper stoplamp switch adjustment. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__stoplamp-switch) under ADJUSTMENTS. Inspect for poor connections at the stoplamp switch. Did you find and correct the condition? If so, go to step 17 . If not, go to step 14 .
11. Inspect for poor connections at the shift lock solenoid. Did you find and correct the condition? If so, go to step 17 . If not, go to step 15 .
12. Inspect for poor connections at the harness connector of the BCM. Did you find and correct the condition? If so, go to step 17 . If not, go to step 16 .
13. Repair the ignition feed circuit (Pink wire) to the stoplamp switch. After repairs, go to step 17 .
14. Replace the stoplamp switch. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__stoplamp-switch) under REMOVAL & INSTALLATION. After repairs, go to step 17 .
15. Replace the shift lock solenoid. See «SHIFT LOCK SOLENOID»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under REMOVAL & INSTALLATION. After repairs, go to step 17 .
16. Replace the BCM. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. After repairs, go to step 17 .
17. Use the scan tool in order to clear the DTCs. Road test the vehicle within the «CONDITIONS FOR SETTING DTC»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__conditions-for-setting-dtc) . Does the DTC reset? If so, go to step 2 . If not, system is okay.

Diagnostic Aids

1. If DTC B2712 is a history DTC, the fault may be intermittent. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING.
2. The following conditions may cause an intermittent malfunction to occur: An intermittent short to ground or open in the controlled ground circuit of the A/T shift lock solenoid, the A/T shift lock solenoid coil is intermittently shorted to ground internally or, the BCM is intermittently shorted to ground internally.

DTC B2713

Note. For circuit reference, see CONNECTOR IDENTIFICATION and WIRING DIAGRAMS .

The BCM controls the A/T shift lock solenoid ground circuit and monitors the voltage of the ground control circuit.

The controlled ground circuit of the A/T shift lock solenoid must be ON.

1. The BCM detects the controlled ground circuit voltage is approximately equal to battery voltage in the ON state.
2. The condition above must be present for more than 0.3 second.
3. This DTC will be set after 20 seconds due to possible false failures.

The BCM stores DTC B2713 in memory.

1. The BCM determines that the controlled ground circuit of the A/T shift lock solenoid is no longer shorted to battery voltage.
2. A history DTC B2713 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
3. A scan tool may be used to clear the DTC.

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

1. 2 Listen for an audible click when the A/T shift lock solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 3 Tests for an internal short of the A/T shift lock solenoid. Command both ON and OFF states. Repeat the commands as necessary.
3. 4 Tests if voltage is constantly being applied to the A/T shift lock solenoid control circuit.
4. 8 The BCM must be programmed for the vehicle RPO configuration.

1. Did you perform the diagnostic system check? If so, go to next step. If not, see «DIAGNOSTIC SYSTEM CHECK»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under SELF-DIAGNOSTIC SYSTEM.
2. Install a scan tool. Turn the ignition switch to the ON position. With a scan tool, command the shift lock solenoid ON and OFF. Does the shift lock solenoid turn ON and OFF with each command? If so, check for an intermittent condition. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING. If not, go to next step.
3. Turn ignition switch to the OFF position. Disconnect the shift lock solenoid. Connect a test light between the shift lock solenoid voltage supply circuit (Dark Green/White wire) and the shift lock solenoid control circuit (Tan/White wire) at the shift lock solenoid. Turn the ignition switch to the ON position. With a scan tool, command the shift lock solenoid ON and OFF. Does the test light turn ON and OFF with each command? If so, go to step 5 . If not, go to next step.
4. Test the shift lock solenoid control circuit (Tan/White wire) for a short to voltage. Did you find and correct the condition? If so, go to step 9 . If not, go to step 6 .
5. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step 9 . If not, go to step 7 .
6. Check the BCM for poor connections. Did you find and correct the condition? If so, go to step 9 . If not, go to step 8 .
7. Replace the shift lock solenoid. See «SHIFT LOCK SOLENOID»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under REMOVAL & INSTALLATION. After repairs, go to step 9 .
8. Replace the BCM. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. After repairs, go to step 9 .
9. Use the scan tool in order to clear the DTCs. Road test the vehicle within the «CONDITIONS FOR SETTING DTC»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__conditions-for-setting-dtc) . Does the DTC reset? If so, go to step 2 . If not, system is okay.

1. If DTC B2713 is a history DTC, the fault may be intermittent. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING.
2. The following conditions may cause an intermittent malfunction to occur: An intermittent short to battery voltage in the controlled ground circuit of the A/T shift lock solenoid, the A/T shift lock solenoid coil is shorted to battery voltage internally or, the BCM is shorted to battery internally.

SYMPTOM TESTS

SYMPTOM TEST INDEX

TEST A: SHIFT LEVER DOES NOT MOVE WITH BRAKE PEDAL DEPRESSED

Note. For circuit reference, see CONNECTOR IDENTIFICATION and WIRING DIAGRAMS .

1. Did you perform the diagnostic system check? If so, go to next step. If not, see «DIAGNOSTIC SYSTEM CHECK»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under SELF-DIAGNOSTIC SYSTEM.
2. Turn ignition switch to RUN position. Press and hold the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, check for intermittent condition. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING. If not, go to next step.
3. Turn ignition switch to OFF position. Disconnect the stoplamp switch. Turn ignition switch to RUN position. Press and hold the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, go to step 5 . If not, go to next step.
4. Disconnect the shift lock solenoid. Turn ignition switch to the ON position. Press and hold the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, go to step 7 . If not, go to step 6 .
5. Inspect for proper stoplamp switch adjustment. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__stoplamp-switch) under ADJUSTMENTS. Inspect the stoplamp switch for poor connections. Did you find and correct the condition? If so, go to step 10 . If not go to step 8 .
6. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step 10 . If not go to step 9 .
7. Repair the short to battery voltage in the shift lock solenoid supply voltage circuit (Dark Green/White wire). After repairs, go to step 10 .
8. Replace the stoplamp switch. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under REMOVAL & INSTALLATION. After repairs, go to step 10 .
9. Replace the shift lock solenoid. See «SHIFT LOCK SOLENOID»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under REMOVAL & INSTALLATION. After repairs, go to next step.
10. Operate the system in order to verify the repair. Did you correct the condition? If so, system is okay. If not, go to step 3 .

TEST B: SHIFT LEVER CAN BE MOVED WITHOUT BRAKE PEDAL DEPRESSED

Note. For circuit reference, see CONNECTOR IDENTIFICATION and WIRING DIAGRAMS .

1. Did you perform the diagnostic system check? If so, go to next step. If not, see «DIAGNOSTIC SYSTEM CHECK»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under SELF-DIAGNOSTIC SYSTEM.
2. Apply the parking brake and block the wheels. Turn ignition switch to RUN position. Attempt to move the gearshift lever out of the Park position without pressing the brake pedal. Does the gearshift lever move out of the Park position? If so, go to next step. If not, check for intermittent condition. See «SYMPTOM DIAGNOSIS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__symptom-diagnosis) under TROUBLE SHOOTING.
3. Connect a test light between ground and the stoplamp switch ignition feed circuit (Pink wire). Turn ignition switch to the ON position. Does the test light illuminate? If so, go to next step. If not, go to step 11 .
4. Connect a test light between ground and the shift lock solenoid voltage supply circuit (Dark Green/White wire) at the stoplamp switch. Turn ignition switch to ON position, with the engine OFF. Press and release the brake pedal several times while observing the test light. Does the test light turn ON and OFF with the brake pedal? If so, go to next step. If not, go to step 8 .
5. Connect a test light between ground and the shift lock solenoid voltage supply circuit (Dark Green/White wire) at the shift lock solenoid. Turn the ignition switch to ON position, with the engine OFF. Press and hold the brake pedal. Does the test light illuminate? If so, go to next step. If not, go to step 12 .
6. Ensure the gearshift lever is in the Park position. Connect a test light between battery voltage and shift lock solenoid signal circuit (Tan/White wire) at the shift lock solenoid. Turn the ignition switch to ON position, with the engine OFF. Does the test light illuminate? If so, go to step 9 . If not, go to next step.
7. Connect a test light between battery voltage and shift lock solenoid signal circuit (Tan/White wire) at the BCM. Turn the ignition switch to ON ignition, with the engine OFF. Does the test light illuminate? If so, go to step 13 . If not, go to step 10 .
8. Inspect for proper stoplamp switch adjustment. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__stoplamp-switch) under ADJUSTMENTS. Inspect for poor connections at the harness connector of the stoplamp switch. Did you find and correct the condition? If so, go to step 17 . If not, go to step 14 .
9. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step 17 . If not, go to step 15 .
10. Inspect for poor connections at the BCM. Did you find and correct the condition? If so, go to step 17 . If not, go to step 16 .
11. Repair the open in the stoplamp switch ignition feed circuit (Pink wire). After repairs, go to step 17 .
12. Repair the open in the shift lock solenoid voltage supply circuit (Dark Green/White wire). After repairs, go to step 17 .
13. Repair the open in the shift lock solenoid signal circuit (Tan/White wire). After repairs, go to step 17 .
14. Replace the stoplamp switch. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under REMOVAL & INSTALLATION. After repairs, go to step 17 .
15. Replace the shift lock solenoid. See «SHIFT LOCK SOLENOID»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems) under REMOVAL & INSTALLATION. After repairs, go to step 17 .
16. Replace the BCM. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. After repairs, go to step 17 .
17. Operate the system in order to verify the repair. Did you correct the condition? If so, system okay. If not, go to step 2 .

ADJUSTMENTS

1. Place the shift lever in the Park position. Place the ignition key in the LOCK position. Ensure the shift lever cannot move to another position. The ignition key should be removable from the ignition lock cylinder.
2. Place the ignition key in the RUN position. Place the shift lever in the Neutral position. Ensure the ignition key cannot turn to the LOCK position. The system is properly adjusted if the above conditions are met. If above conditions are not met, go to next step.
3. Pull the cable connector lock back to the UP position. (Scheme 273) Adjust the cable connector as follows: Push the cable connector nose forward to remove the slack. (Scheme 274) Push the cable connector lock button down.
4. Check the operation. If the ignition key cannot be removed in the Park position, then pull the connector lock button to the UP position. Move the cable connector nose rearward until the key can be removed from the ignition. Push the lock button down. Install the cable into the clips to provide the correct routing.

Scheme 273

Scheme 274

SHIFT LOCK SOLENOID

Note. Only console-mounted solenoid is adjustable. Adjustment procedure is contained within removal and installation procedure. See SHIFT LOCK SOLENOID under REMOVAL & INSTALLATION.

STOPLAMP SWITCH

Note. Adjust the stoplamp switch and cruise control release switch at the same time. The adjustment procedures for the stoplamp switch and the cruise control release switch are identical.

1. Remove left side insulator panel. See «INSULATOR PANEL (LEFT SIDE)»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__insulator-panel-left-side) under REMOVAL & INSTALLATION. With the brake pedal fully released, ensure the stoplamp switch plunger is fully depressed against the brake pedal shanks. (Scheme 275)
2. If switch position is not as specified, push the brake pedal forward in order to set the brake push rod into the booster. Push the stoplamp switch and the cruise control switch (if equipped) further into the brake pedal bracket. (Scheme 276)
3. Pull the brake pedal to the rear, against the internal stop. The stoplamp switch and cruise control switch will automatically adjust. Inspect the stoplamps for proper operation. Install left side insulator panel. See «INSULATOR PANEL (LEFT SIDE)»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__insulator-panel-left-side) under REMOVAL & INSTALLATION.

Scheme 275

Scheme 276

REMOVAL & INSTALLATION

Note. Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Removal (Column Shift)

1. Remove the steering column trim covers. See «STEERING COLUMN TRIM COVERS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems).
2. Remove the shift lever actuator. (Scheme 277) Disconnect the electrical connector from the shift lock solenoid. Remove the shift lock solenoid from the steering column ball studs.

Installation (Column Shift)

1. Install the shift lock solenoid onto the steering column ball studs.
2. Connect the electrical connector to the shift lock solenoid.
3. Install the shift lever actuator. (Scheme 277)
4. Place the column in the Neutral position.
5. Adjust the shift lock control solenoid as follows: Pull out the tab (1) on the adjuster block side (2) of the solenoid. (Scheme 278) Press on the adjuster block (2) in order to compress the internal adjuster spring and disengage the adjuster teeth. Slide the adjuster block as far away from the solenoid as possible. (Scheme 278) Lock in place by pushing in on the tab (1). (Scheme 278)
6. Inspect the shift lock solenoid as follows: The solenoid must lock the shift lever clevis when you place the clevis in the park position. If you can move the shift lever without pressing on the brake pedal, readjust the solenoid.
7. Install the steering column trim covers. See «STEERING COLUMN TRIM COVERS»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems).

Scheme 277

Scheme 278

Removal (Floor Shift)

1. Disconnect the negative battery cable. Remove the floor console. See «FLOOR CONSOLE»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems).
2. Disconnect electrical connector from the shift lock solenoid. (Scheme 279) Remove both ends of the shift lock solenoid from pivot points (1). (Scheme 280)

Installation (Floor Shift)

1. Install the upper clip (1) of the shift lock solenoid onto the upper pivot point, and the lower clip onto the lower pivot point. (Scheme 280) Connect the electrical connector to the shift lock solenoid.
2. Install the floor console. See «FLOOR CONSOLE»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems). Connect the negative battery cable.

Scheme 279

Scheme 280

Removal (Impala)

1. Apply the parking brake. Adjust the shift control indicator to 2nd gear position. Open the storage compartment door. Carefully pry the rear of the trim plate away from the front floor console. (Scheme 281)
2. Pull the trim plate toward the rear of the vehicle in order to disengage the front of the trim plate. Remove the console shift control bezel. Disconnect the electrical connector at the rear of the front floor console trim plate. Rotate the trim plate 180 degrees. Lift the trim plate over the shift control handle.
3. Disconnect the wiring harness retainers from the trim plate. Disconnect the ashtray light and the wiring harness. Disconnect the cigar lighter electrical connector. Remove the ashtray. Remove the front floor console trim plate.

Installation (Impala)

1. Install the front floor console trim plate. Install the ashtray. Connect the cigar lighter electrical connector. Install the ashtray light and the wiring harness. Connect the wiring harness retainers to the trim plate.
2. Lower the trim plate over the shift control handle. Rotate the trim plate 180 degrees. Connect the electrical connector at the rear of the trim plate. Install the console shift control bezel.
3. Engage the trim plate. (Scheme 281) Ensure the retainers are completely engaged. Close the storage compartment door. Place the transaxle shift control indicator in Park. Release the parking brake.

Scheme 281

Removal (Monte Carlo)

1. Apply the parking brake. Position the transaxle shift control indicator in 2nd gear position. Remove the front floor console trim plate screw (1) located between the instrument panel and the shift lever. (Scheme 282)
2. Open the storage compartment door. Lift the trim plate up and slightly rearward. Remove the wiring harnesses from the retainers. Disconnect the traction control switch electrical connector. Remove the shift lever trim plate.
3. Disconnect the heated seat switches from the trim plate. Remove the trim plate by lifting the trim plate slightly and rotating the trim plate 180 degrees. (Scheme 283) Lift the trim plate over the shift control handle. Disconnect the electrical connector from the cigarette lighter.

Installation (Monte Carlo)

1. Lower the front floor console trim plate over the shift control handle as shown. Rotate the trim plate 180 degrees. (Scheme 283) Connect the electrical connector to the cigarette lighter. Connect the heated seat switches to the trim plate.
2. Install the shift lever trim plate. Connect the traction control switch electric connector. Install the wiring harnesses to the retainers. Install the trim plate by pressing down on the retainers until fully seated.
3. Install the trim plate screw (1) located between the instrument panel and the shift lever. (Scheme 282) Tighten the screw to 18 INCH lbs. (2 N.m). Position the transaxle shift control indicator in Park. Release the parking brake.

Scheme 282

Scheme 283

1. Remove the trim plate from the front floor console. See «CONSOLE TRIM PLATE»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems).
2. Remove the following front floor console bolts: near the instrument panel, at the transaxle shift control lever and under the mat in the rear bin. (Scheme 284)
3. Pull the console rearward in order to disengage the clips from the instrument panel. (Scheme 285)
4. Disconnect the electrical connectors. Remove the front floor console.

1. Position the front floor console to the vehicle. Connect the electrical connectors. Install the front floor console. Engage the clips at the instrument panel. (Scheme 285)
2. Install the following front floor console bolts: near the instrument panel, at the transaxle shift control lever and under the mat in the rear bin. (Scheme 284)
3. Tighten the bolts to 106 INCH lbs. (12 N.m). Install the trim plate to the front floor console. See «CONSOLE TRIM PLATE»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems).

Scheme 284

Scheme 285

1. Remove the trim plate from the front floor console. See «CONSOLE TRIM PLATE»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems). Disconnect the wiring harness connector and retainer. Open the console storage compartment.
2. Remove the storage compartment mat. Remove the bolts from the bottom of the storage compartment. Remove the console bolts forward of the shift control lever. Remove all necessary harness connectors. (Scheme 286) Remove the front floor console. (Scheme 287)

Scheme 286

Scheme 287

1. Install the front floor console. Install all necessary harness connectors. (Scheme 286) Install the console bolts forward of the shift control lever and at the bottom of the storage bin. (Scheme 287)
2. Tighten the console bolts to 106 INCH lbs. (12 N.m). Install the storage compartment mat. Close the console storage compartment. Connect the wiring harness connector and retainer. Install the front floor console trim plate. See «CONSOLE TRIM PLATE»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems).

Removal

Remove the left instrument panel insulator. See INSULATOR PANEL (LEFT SIDE). Remove the steering column filler panel. See STEERING COLUMN FILLER PANEL. Remove the bracket bolts from the instrument panel driver knee bolster. Remove the bracket bolts from the instrument panel knee bolster at the instrument carrier. (Scheme 288) Remove the instrument panel knee bolster bracket.

Installation

Align the knee bolster bracket to the instrument panel. Install the knee bolster bracket bolts to the instrument carrier in the sequence shown. (Scheme 288) Tighten the bolts to 89 INCH lbs. (10 N.m). Install the bracket bolts which secure the instrument panel driver knee bolster to the instrument panel lower trim panel. Tighten the bracket bolts to 89 INCH lbs. (10 N.m). Install the steering column filler panel. See STEERING COLUMN FILLER PANEL. Install the left instrument panel insulator.

Scheme 288

INSULATOR PANEL (LEFT SIDE)

Note. Tools required: Door Trim Pad Remover (J-38778).

Use the door trim pad remover in order to remove the push-in retainers from the left instrument panel insulator. Lower the insulator from the instrument panel. Rotate the courtesy light counterclockwise. Pull the left instrument panel insulator rearward from the stud at the accelerator pedal. (Scheme 289) Remove the left instrument panel insulator.

Position the courtesy light into the left instrument panel insulator. Rotate the courtesy light clockwise to secure correctly. Align the instrument panel insulator with the stud at the accelerator pedal. (Scheme 289) Install the left instrument panel insulator to the instrument panel. Install the push-in retainers to the left instrument panel insulator.

Scheme 289

Remove the upper and lower steering column trim covers. See STEERING COLUMN TRIM COVERS. Slide the shift lever seal (2) up the shift lever (4). Remove the shift lever screw (3). Remove the shift lever (4). (Scheme 290)

Install the shift lever (4) and secure it with the shift lever screw (3). (Scheme 290) Tighten the shift lever screw to 15 ft. lbs. (20 N.m). Slide the shift lever seal (2) down the shift lever (4). Install the upper and lower steering column trim covers.

Scheme 290

1. Remove the access cover from the left instrument panel fuse block. Release the left instrument panel insulator tabs from the lower instrument panel trim pad retainers for access. Remove the bolts from the steering column filler panel. (Scheme 291)
2. Release the steering column filler panel retainers from the instrument panel lower trim panel. Carefully lower the panel away from the instrument panel lower trim panel. Disconnect the electrical connector from the rear compartment release switch. Remove the rear compartment release switch. Remove the steering column filler panel.

Scheme 291

1. Install the rear compartment release switch. Connect the electrical connector to the rear compartment release switch. Align the steering column filler panel to the instrument panel lower trim panel.
2. Install the panel retainers to the instrument panel lower trim panel. Install the bolts to the steering column filler panel. (Scheme 291) Tighten the bolts to 18 INCH lbs. (2 N.m). Install the insulator tabs to the lower instrument panel trim pad retainers. Install the access cover to the left instrument panel fuse block.

1. Disable the SIR system. See AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION. Remove the steering wheel. See appropriate STEERING COLUMNS article in STEERING.
2. Pivot the tilt lever back and forth, while pulling the lever from the column. Remove the tilt lever from the steering column. (Scheme 292)
3. Remove the 2 Torx(R) head screws (1) from the lower trim cover (2). Remove the lower trim cover from the upper trim cover. Tilt the lower trim cover down. (Scheme 293)
4. Slide the lower trim cover backward in order to disengage the locking tabs. (Scheme 294) Remove the 2 Torx(R) head screws (1) from the upper trim cover (2). (Scheme 295) Remove the upper trim cover (2) from the steering column.

1. Install the upper trim cover (2) onto the steering column. Screw the 2 Torx(R) head screws (1) into the upper trim cover (2). Tighten the 2 Torx(R) head screws to 13 INCH lbs. (1.5 N.m). (Scheme 295)
2. Install the lower trim cover onto the upper trim cover. Match the tab slots on the lower trim cover with the locking tabs on the upper trim cover. (Scheme 294)
3. Tilt the lower trim cover up. Slide the lower trim cover forward until the locking tabs snap into the tab slots. Screw the 2 Torx(R) head screws (1) into the lower trim cover (2). Tighten the 2 Torx(R) head screws to 31 INCH lbs. (3.5 N.m). (Scheme 293)
4. Install the tilt lever. (Scheme 292) Install the steering wheel. See appropriate STEERING COLUMNS article in STEERING. Enable the SIR system. See AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION.

Scheme 292

Scheme 293

Scheme 294

Scheme 295

Note. Stoplamp switch is also referred to as "A/T shift lock control switch".

1. Remove the left side instrument panel insulator. See «INSULATOR PANEL (LEFT SIDE)»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__insulator-panel-left-side).
2. Disconnect the electrical connector from the stoplamp switch.
3. Remove the stoplamp switch (2) from the brake pedal bracket. (Scheme 296)

1. Install the stoplamp switch (2) to the brake pedal bracket. (Scheme 296)
2. Connect the electrical connector to the stoplamp switch and adjust. See «STOPLAMP SWITCH»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__stoplamp-switch) under ADJUSTMENTS.
3. Install the left side instrument panel insulator. See «INSULATOR PANEL (LEFT SIDE)»(/chevrolet/impala/viii-1999-2006/remont/automatic-trans/#shift-interlock-systems__insulator-panel-left-side).

Scheme 296

Scheme 297

Scheme 298

Scheme 299

Shift Interlock System Wiring Diagram (2001 Impala & Monte Carlo). Scheme 300

Shift Interlock System Wiring Diagram (2002 Impala & Monte Carlo). Scheme 301

See also:
• WIRING DIAGRAMS
• SYMPTOM DIAGNOSIS
• DESCRIPTION & OPERATION
• SYMPTOM TESTS
• DIAGNOSTIC TROUBLE CODE DEFINITIONS
• B2712
• B2713
• DIAGNOSTIC TESTS
• STOPLAMP SWITCH
• CONDITIONS FOR SETTING DTC
• A
• B
• INSULATOR PANEL (LEFT SIDE)