GM Service Manual Online
For 1990-2009 cars only

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.

    Important: The CKP System Variation Learn Procedure will need to be performed whenever the Crankshaft Position (CKP) sensor is removed or replaced. Refer to Crankshaft Position System Variation Learn .

  1. Disconnect the negative battery cable.
  2. Raise the Vehicle. Refer to Lifting and Jacking the Vehicle .

  3. Object Number: 325346  Size: SH
  4. If the vehicle is equipped with the underbody shield package, then remove the steering linkage shield mounting bolts.

  5. Object Number: 325348  Size: SH
  6. Remove the steering linkage shield.

  7. Object Number: 10937  Size: SH
  8. Disconnect the CKP sensor harness connector.

  9. Object Number: 10938  Size: SH
  10. Remove the CKP sensor mounting bolt.

  11. Object Number: 11485  Size: SH
  12. Remove the CKP sensor.

Installation Procedure

Important: When installing the CKP sensor, make sure the sensor is fully seated before tightening the mounting bolt. A poorly seated CKP sensor may perform erratically; possibly setting false DTCs.

    Important: Do not reuse the original O-ring.

  1. Replace the CKP sensor O-ring.
  2. Lubricate the O-ring with clean engine oil before installing the CKP sensor.

  3. Object Number: 11485  Size: SH

    Important: Make sure the CKP sensor mounting surface is clean and free of burrs.

  4. Install the CKP sensor.

  5. Object Number: 10938  Size: SH

    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.

  6. Install the CKP sensor mounting bolt.
  7. Tighten
    Tighten the CKP sensor mounting bolt to 20 N·m (15 lb ft).


    Object Number: 10937  Size: SH
  8. Connect the CKP sensor harness connector.

  9. Object Number: 325348  Size: SH
  10. Install the steering linkage shield.

  11. Object Number: 325346  Size: SH
  12. Install the steering linkage shield mounting bolts.
  13. Tighten
    Tighten the bolts to 33 N·m (24 lb ft).

  14. Lower the Vehicle. Refer to Lifting and Jacking the Vehicle .
  15. Connect the negative battery cable.
  16. Perform the CKP System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn .