GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Note: Care must be taken when removing the crankshaft position (CKP) sensor. Use penetrating oil and allow to soak around the CKP sensor before removing the sensor. Twist the sensor to break the O-ring seals loose. When removing the sensor, pull the sensor straight out of the engine block at the same angle the sensor was installed. Failure to be careful may result in sensor damage.

  1. Remove the engine cover. Refer to Engine Cover Replacement.

  2. Object Number: 674728  Size: SH
  3. Disconnect the crankshaft position (CKP) sensor harness connector at the CKP sensor.
  4. If required, remove the fuel line bracket and retaining bolt..
  5. Use penetrating oil and allow to soak around the CKP sensor before removing the sensor.

  6. Object Number: 1150725  Size: SH
  7. Remove the CKP sensor retaining bolt.
  8. Prior to removal of the CKP sensor, rotate the sensor back and forth.
  9. Remove the CKP sensor at the same angle the sensor will be installed.

  10. Object Number: 814961  Size: SH

    Note: The CKP sensor is designed to contact the reluctor wheel of the crankshaft. Wear may be noticeable on the end of the sensor.

  11. Inspect the CKP sensor for wear (1, 2).

  12. Object Number: 814962  Size: SH

    Note: Normal CKP sensor wear will be shown on the wear strips (1) and no wear will be shown on the sensor sensing element (2).

  13. Inspect the wear strips (1).

Installation Procedure


    Object Number: 1150725  Size: SH

    Note: Inspect the CKP sensor O-ring for wear or damage. If a problem is found, replace the O-ring. Lubricate the new O-ring with engine oil before installing.

  1. Install the CKP sensor at the same angle the sensor was removed.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the CKP sensor retaining bolt.
  4. Tighten
    Tighten the bolt to 12 N·m (106 lb in).


    Object Number: 674728  Size: SH
  5. Connect the CKP sensor harness connector.
  6. If required, install the fuel line bracket and retaining bolt.
  7. Install the engine cover. Refer to Engine Cover Replacement.
  8. Perform the CKP System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn.