2008 Pontiac Grand Prix V6-3.8LFACTORY OEM SERVICE PROCEDURE

Ignition Switch: Service and Repair



Ignition and Start Switch Replacement

Removal Procedure


Factory service manual diagram



1. Disconnect the battery ground cable. Refer to Battery Negative Cable Disconnection and Connection (L26 - 3.8L) (Service and Repair)Battery Negative Cable Disconnection and Connection (LS4 - 5.3L) (Service and Repair) .
2. Use a plastic trim tool to remove the ignition switch bezel.

Factory service manual diagram



3. Remove the instrument panel (I/P) accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement (Service and Repair) .
4. Remove the left I/P insulator. Refer to Instrument Panel Insulator Panel Replacement - Left Side (Service and Repair) .
5. Remove the I/P steering column opening filler panel. Refer to Steering Column Opening Filler Replacement (Service and Repair) .
6. Remove the I/P driver knee bolster. Refer to Driver Knee Bolster Replacement (Service and Repair) .
7. Remove the ignition switch bolts.

Factory service manual diagram



8. Lower the ignition switch away from the I/P trim pad.
9. Insert the key into the ignition lock cylinder. Turn the key to the ON/RUN position.

Factory service manual diagram



10. Depress the retainer to release the transaxle park/lock cable. Pull the park/lock cable from the ignition switch.

Factory service manual diagram




Important: You cannot remove the Passkey(TM) electrical connector until the lock cylinder is removed.


11. Depress and hold the detent on the bottom of the ignition switch in order to release the ignition lock cylinder. Remove the ignition lock cylinder with the key.

Factory service manual diagram



12. Disconnect the Passkey(TM) electrical connector.

Factory service manual diagram



13. Disconnect the electrical connectors.
14. Remove the I/P ignition and start switch.

Factory service manual diagram



15. Use the following procedure if the ignition switch lock cylinder is seized or won't rotate:

1. Protect the immediate work area with suitable material such as clean shop towels or a clean fender cover.
2. Locate the surface for the release button (2) for the ignition switch lock cylinder on the plastic ignition switch housing. Center punch a location (1) on the rib approximately 3/8 inch reward, toward the key entry end, from the cylinder release button.
3. Carefully drill a pilot hole through the plastic housing with a 1/8-inch drill bit.
4. Using a 9/32-inch drill bit, carefully drill a larger hole at the pilot location, and slightly into the surface of the ignition switch lock cylinder, to break the release button retaining spring.
5. Remove portions of the broken spring from the hole using a small suitable tool.
6. Grasp the ignition switch lock cylinder and remove the cylinder from the switch housing.
7. Remove any plastic flash from the drilling operation, and using compressed air blow out the ignition switch assembly.
8. Follow service manual procedures when cylinder recoding is required. Refer to Key and Lock Cylinder Coding (Description and Operation) .




Installation Procedure


Factory service manual diagram



1. Perform the following steps if the ignition switch lock cylinder which you previously removed was seized or would not rotate.

1. Install the new ignition switch lock cylinder as required by rotating both the cylinder and the ignition switch to the ON position.
2. Push the ignition switch lock cylinder into the ignition switch housing until fully seated.
3. You may have to slightly depress the release button as the button passes by the 9/32-in hole previously drilled in the ignition switch housing.

2. Connect the electrical connectors.

Factory service manual diagram



3. Connect the Passkey(TM) electrical connector.

Factory service manual diagram



4. Connect the park/lock cable to the ignition switch.

Factory service manual diagram



5. Turn the key to the ON/RUN position. Install the ignition lock cylinder into the ignition switch.
If you turned the key slightly while removing the lock cylinder, you may have to align the white colored ignition switch rotor (1) with the lock cylinder (2). You can rotate the switch rotor with your finger.
6. Remove the key.
7. Position the ignition switch to the I/P trim pad.

Factory service manual diagram




Notice: Refer to Fastener Notice (Fastener Notice) .

8. Install the ignition switch bolts.

Tighten the bolts to 10 N.m (89 lb in).

9. Install the I/P driver knee bolster. Refer to Driver Knee Bolster Replacement (Service and Repair) .
10. Install the I/P steering column opening filler panel. Refer to Steering Column Opening Filler Replacement (Service and Repair) .
11. Install the left I/P insulator. Refer to Instrument Panel Insulator Panel Replacement - Left Side (Service and Repair) .
12. Install the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement (Service and Repair) .

Factory service manual diagram



13. Install the ignition switch bezel.
14. Connect the battery ground cable. Refer to Battery Negative Cable Disconnection and Connection (L26 - 3.8L) (Service and Repair)Battery Negative Cable Disconnection and Connection (LS4 - 5.3L) (Service and Repair) .


Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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