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.
- 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. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.
- Disable the SIR system. See: Air Bag(s) Arming and Disarming\Service and Repair\Disabling the SIR System
- Position the steering wheel half way between the upper and lower tilt stops (if necessary).
- Remove the steering wheel. See: Steering Wheel
- Roll back the shift lever seal from the upper and the lower shrouds.
- Remove the 2 TORX screws from the lower steering column shroud.
- Remove the lower steering column shroud.
- Remove the 2 TORX screws from the upper steering column shroud.
- Lift the upper steering column shroud to gain access to the lock cylinder access hole.
- Using a bent tip awl, insert the tip into the ignition lock cylinder access hole.
- Turn the ignition lock cylinder to the START position. Using the bent tip awl, push down on the ignition lock cylinder retaining pin.
- Release the ignition lock cylinder to the RUN position.
- Remove the ignition lock cylinder from the lock module assembly by pulling the ignition lock cylinder away from the steering column.
INSTALLATION PROCEDURE
- Insert the ignition lock cylinder through the upper shroud.
- Install the ignition lock cylinder to the lock module assembly by doing the following:
2.1. Align the positioning slot and locking tab slot on the lock module assembly to the positioning tab and locking tab on the ignition lock cylinder. 2.2. Push the ignition lock cylinder into the lock module assembly until the locking tab locks against the locking tab.
- Install the 2 TORX screws to the upper shroud.
- Tighten the 2 TORX screws to 6 Nm (53 inch lbs.).
Notice: 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.
- Install the lower shroud.
- Install the shift lever seal to the upper and the lower shrouds.
- Install the steering wheel.
- Enable the SIR system. See: Air Bag(s) Arming and Disarming\Service and Repair\Enabling the SIR System
- Connect the battery negative cable.
- Perform the Passlock learn procedure. See: Testing and Inspection\PASSLOCK - Reprogramming Auto Learn
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DISASSEMBLY PROCEDURE
- Remove the upper and lower shrouds.
- Pop the wire harness assembly (4) out of the wire harness strap (5). Remove the wire harness straps (3) from the wire harness assembly (4). Remove the wire harness strap (2) from the upper tilt head assembly (1).
- Slide the 2 connectors (2) of the turn signal and multifunction switch assembly out from the bulk head connector (1).
- Remove the key alarm connector (1) from the lock module assembly (2).
- Remove the 2 tapping screws from the ignition and key alarm switch assembly (3).
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Ignition & Key Alarm Switch - Assemble
ASSEMBLY PROCEDURE
- Install the ignition and key alarm switch assembly (3) onto the lock module assembly (2) and secure by using 2 tapping screws.
- Tighten the screws to 4.7 Nm (42 inch lbs.).
Notice: Refer to Fastener Notice in Service Precautions.
- Install the key alarm connector (1) onto the lock module assembly (2).
- Slide the 2 connectors (2) of the turn signal and multifunction switch assembly into the bulk head connector (1).
- Pop the wire harness assembly (4) into the wire harness strap (5). Install the wire harness strap (2) into the steering column tilt head assembly (1). Install the wire harness straps (3) onto the wire harness assembly (4).
- Install the upper and lower shrouds.
