GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1811485  Size: SH
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
  2. Disconnect the engine wiring harness electrical connectors (2, 3) 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: 1811485  Size: SH
  6. Connect the engine wiring harness electrical connector (2, 3) to the appropriate CMP actuator solenoid valve.
  7. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.