GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 302854  Size: SH
  1. Disconnect the spark plug wires and ignition coil wire from the distributor. Refer to Spark Plug Wire Replacement .

  2. Object Number: 302829  Size: SH
  3. Disconnect the camshaft position (CMP) sensor harness connector from the distributor.

  4. Object Number: 157984  Size: SH
  5. Remove the distributor cap screws.

  6. Object Number: 157986  Size: SH
  7. Remove the distributor cap.

  8. Object Number: 4354  Size: SH
  9. Remove the rotor screws.

  10. Object Number: 156748  Size: SH
  11. Remove the rotor.

  12. Object Number: 156754  Size: SH
  13. Align the square slot in the reluctor wheel with the CMP sensor.

  14. Object Number: 4341  Size: SH
  15. Remove the CMP screws.

  16. Object Number: 301398  Size: SH
  17. Remove the CMP sensor.

Installation Procedure

Important: DO NOT use the old cap, CMP sensor, and rotor screws. Use the replacement screws that have been coated with a thread locking compound.


    Object Number: 301398  Size: SH
  1. Insert the CMP sensor through the reluctor wheel slot.

  2. Object Number: 4341  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 new CMP mounting screws.
  4. Tighten
    Tighten the bolts to 2.2 N·m (19 lb in).


    Object Number: 156748  Size: SH
  5. Install the rotor onto the reluctor wheel.

  6. Object Number: 4354  Size: SH
  7. Install new rotor screws.
  8. Tighten
    Tighten the screws to 2 N·m (18 lb in).


    Object Number: 157986  Size: SH
  9. Install the distributor cap.

  10. Object Number: 157984  Size: SH
  11. Install new distributor cap screws.
  12. Tighten
    Tighten the screws to 2.4 N·m (21 lb in).


    Object Number: 302829  Size: SH
  13. Connect the CMP sensor harness connector.

  14. Object Number: 302854  Size: SH
  15. Connect the spark plug wires and ignition coil wire. Refer to Spark Plug Wire Replacement .