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

Note: 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.

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1237427  Size: SH
  1. Install the CKP sensor into the engine block. Tighten the bolt to 10 N·m (89 lb in).
  2. Install the CKP sensor retaining bolt.
  3. Connect the CKP sensor harness connector.
  4. Lower the vehicle.
  5. Perform the Crankshaft Position System Variation Learn.