GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

  2. Object Number: 1237427  Size: SH
  3. Disconnect the crankshaft position (CKP) sensor harness connector.
  4. Remove the CKP sensor retaining bolt.
  5. Remove the CKP sensor from the engine block.

Installation Procedure

Important: Inspect the sensor O-ring for the following conditions:

    • Any wear
    • Any cracks
    • Any leakage

Replace the O-ring if necessary. Lubricate the new O-ring with engine oil before installation.

    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.


    Object Number: 1237427  Size: SH
  1. Install the CKP sensor into the engine block.
  2. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  3. Install the CKP sensor retaining bolt.
  4. Connect the CKP sensor harness connector.
  5. Lower the vehicle.
  6. Perform the Crankshaft Position System Variation Learn .