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Steering Angle Sensor: Service and Repair





Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement (Centering Not Required)

Tools Required

J 42640 Steering Column Anti Rotation Pin

Removal Procedure

1. Set the front wheels in the straight-ahead position.
2. Install J 42640 or set the steering wheel in the LOCKED position.

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.


3. Disconnect the negative battery cable.
4. Disable the supplemental inflatable restraint (SIR). Service and Repair

Important: You MUST make an alignment mark on the upper to lower steering shaft connection. You will need the alignment marks for installation.

5. Make an alignment mark on the upper and lower steering shafts where they connect before removal.
6. Remove the nut and the bolt from the upper to the lower steering shaft connection.
- Slide the lower shaft down.
7. Remove the steering wheel position sensor connector by using a suitable tool in order to pull the connector down around the right side of the steering column for accessibility.






Important: Remove the steering wheel position sensor connector by using a suitable tool in order to pull the connector down around the right side of the steering column for accessibility.

- The steering wheel position sensor does NOT require centering.

8. Remove the steering wheel position sensor and adapter and bearing assembly from the steering column jacket by pulling the assembly straight out.
9. Remove the steering wheel position sensor from the clips in the adapter and bearing assembly.

Installation Procedure

Important: A new steering wheel position sensor does NOT come with a pin installed.

- The steering wheel position sensor does NOT require centering.

1. Install the steering wheel position sensor into the adapter and bearing assembly.
2. Verify the following before installing the steering wheel position sensor:
- The front wheels are in the straight-ahead position.
- That J 42640 is installed or the steering wheel is in the LOCKED position.
3. Install the adapter and bearing assembly into the steering column jacket.
3.1. Align the notches on the adapter and bearing assembly and the steering column jacket.

Important: Do not apply force to the steering wheel position sensor and the adapter and bearing assembly in a sideways direction.

3.2. Seat the adapter and bearing assembly into the steering column jacket.
4. Connect the steering wheel position sensor connector.

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.

5. Align the marks on the upper and lower steering shafts, where they connect, that you made during the removal procedure.
6. Install the bolt and the nut to the upper end of the shaft.

- Tighten the nut to 62 Nm (46 lb ft).

7. Connect the negative battery cable.
8. Enable the SIR system. Service and Repair

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