GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: 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. Notice: Refer to Fastener Notice 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 .