Ignition Lock Cylinder

This article updated with TSB 02-02-35-001.

IGNITION LOCK CYLINDER REPLACEMENT - ON VEHICLE

REMOVAL PROCEDURE

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

For Vehicles equipped with OnStar (UE1) with Back Up Battery:
The Back Up Battery is a redundant power supply to allow limited OnStar functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar module). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar module in any way while the ignition is On or with RAP activated may cause activation of the OnStar Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.





1. Disconnect the battery negative cable.

Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

2. Disable the Supplemental Inflatable Restraint (SIR) system. Disabling
3. Remove the steering column trim covers. Steering Column Trim Covers
4. Turn the ignition lock cylinder to the START position.
5. Using an awl, insert the tip into the ignition lock cylinder access hole (1).
6. Push down and hold the ignition lock cylinder retaining pin.





7. Release the ignition lock cylinder to the RUN position.
8. Remove the ignition lock cylinder by pulling the ignition lock cylinder away from the steering column.

Installation Procedure





1. Install the ignition lock cylinder into the steering column using the following procedure:
1.1. Align the positioning locking tab slot on the lock module assembly to the positioning tab on the ignition lock cylinder.
1.2. Push the lock cylinder in until the locking tab locks in the lock module assembly.
2. Install the steering column trim covers.
3. Connect the negative battery cable.
4. Enable the SIR system. Enabling
5. Perform the Passlock learn procedure. Theft Deterrent - Programming Components