GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1578480  Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Disconnect the engine harness electrical connectors (1, 2) from the appropriate camshaft position (CMP) actuator solenoid valve.

  3. Object Number: 1578482  Size: SH
  4. Remove the exhaust (1) CMP actuator solenoid valve bolt and valve, if required.
  5. Remove the intake (2) CMP actuator solenoid valve bolt and valve, if required.
  6. Inspect the solenoid valve O-ring seals for damage, replace as necessary.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1578482  Size: SH
  1. Lubricate the solenoid valve O-ring seals with clean engine oil.
  2. Install the intake (2) CMP actuator solenoid valve and bolt, if required.
  3. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  4. Install the exhaust (1) CMP actuator solenoid valve and bolt, if required.
  5. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 1578480  Size: SH
  6. Connect the engine harness electrical connector (1, 2) to the appropriate CMP actuator solenoid valve.
  7. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .