GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Note: Clean the area around the camshaft position (CMP) sensor before removal in order to prevent debris from entering the engine.


    Object Number: 1965271  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the engine shield. Refer to Engine Shield Replacement.
  3. Disconnect the engine wiring harness electrical connector (3) from the CMP sensor wire harness.

  4. Object Number: 1965275  Size: SH
  5. Disconnect the CMP sensor wire harness electrical connector (1) from the CMP actuator magnet.

  6. Object Number: 1965277  Size: SH
  7. Working through the crankshaft balancer opening, loosen the CMP sensor wire harness bolt (1) 2 turns using a box wrench.

  8. Object Number: 1965279  Size: SH
  9. Remove the 2 remaining CMP sensor wire harness bolts (1).

  10. Object Number: 1965280  Size: SH
  11. Lower the vehicle.
  12. Using a small flat bladed tool, disengage the CMP sensor wire harness electrical connector retainer (1) from the CMP sensor.

  13. Object Number: 1965282  Size: SH
  14. Remove the CMP sensor wire harness (1).

  15. Object Number: 1965283  Size: SH
  16. Remove the CMP sensor (1) and O-ring seal (2).

Installation Procedure


    Object Number: 1965283  Size: SH
  1. Inspect the CMP O-ring seal (2) for cuts or damage. If the seal is not damaged, it may be reused.
  2. Lubricate the O-ring seal with clean engine oil.
  3. Install the O-ring seal onto the sensor.
  4. Instal the CMP sensor (1) to the front cover.

  5. Object Number: 1965282  Size: SH
  6. Install the CMP sensor wire harness (1).

  7. Object Number: 1965280  Size: SH
  8. Connect the CMP sensor wire harness electrical connector, ensure that the retainer (1) fully engages the CMP sensor.
  9. Raise and suitably support the vehicle.
  10. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1965279  Size: SH
  11. Install the 2 rear CMP sensor wire harness bolts (1).
  12. Tighten
    Tighten the bolt to 12 N·m (106 lb in).


    Object Number: 1965277  Size: SH
  13. Working through the crankshaft balancer opening, tighten the CMP sensor wire harness bolt (1) using a box wrench.

  14. Object Number: 1965275  Size: SH
  15. Connect the CMP sensor wire harness electrical connector (1) to the CMP actuator magnet.

  16. Object Number: 1965271  Size: SH
  17. Connect the engine wiring harness electrical connector (3) to the CMP sensor wire harness.
  18. Install the engine shield. Refer to Engine Shield Replacement.