GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Turn the ignition OFF.
  2. Important: Do not remove the engine control module (ECM) from the ECM bracket.

    Do not remove the ECM redundant ground wire from the ECM.

  3. Remove the ECM bracket bolts and reposition the ECM bracket in order to provide access.

  4. Object Number: 1285253  Size: SH
  5. Remove the camshaft position (CMP) sensor electrical connector.

  6. Object Number: 1285252  Size: SH
  7. Remove the CMP sensor bolt.
  8. Remove the CMP sensor.

Installation Procedure


    Object Number: 1285252  Size: SH
  1. Install the CMP sensor.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the CMP sensor bolt.
  4. Tighten
    Tighten the CMP sensor bolt to 10 N·m (89 lb in).


    Object Number: 1285253  Size: SH
  5. Install the CMP sensor electrical connector.
  6. Install the ECM bracket with the ECM. Refer to Engine Control Module Replacement .