GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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


    Object Number: 10937  Size: SH
  1. Remove the electrical connector.

  2. Object Number: 10938  Size: SH
  3. Remove the sensor hold down bolt.

  4. Object Number: 10939  Size: SH
  5. Remove the sensor from the timing cover.
  6. Important: When installing or removing a crankshaft position (CKP) sensor make sure the sensor is fully seated and held stationary in the front cover before torquing the hold down bolt into the front cover. A sensor which is not seated may result in erratic operation and lead to the setting of false codes.

  7. Inspect the sensor 0-ring for wear, cracks or leakage.
  8. Replace if necessary. Lube the new o-ring with clean engine oil before installing.

Installation Procedure

    Important: Make certain that the Crankshaft Position (CKP) sensor mounting surfaces are clean and free of burrs before installing the CKP sensor.


    Object Number: 10939  Size: SH
  1. Install the sensor into the timing cover.

  2. 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.

  3. Install the sensor hold down bolt.
  4. Tighten
    Tighten the hold down bolt to 8 N·m (71 lb in).


    Object Number: 10937  Size: SH
  5. Install the electrical connector.
  6. The CKP System Variation Learning Procedure will need to be performed whenever the Crankshaft Position (CKP) sensor is removed or replaced. Refer to Crankshaft Position System Variation Learn .