GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1890391  Size: SH
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
  2. Disconnect the engine wiring harness electrical connector (1) from the exhaust camshaft position (CMP) actuator solenoid valve (4), if required.
  3. Disconnect the engine wiring harness electrical connector (2) from the intake CMP actuator solenoid valve (3), if required.

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

Installation Procedure


    Object Number: 1578482  Size: SH
  1. Lubricate the solenoid valve O-ring seals with clean engine oil.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the intake (2) CMP actuator solenoid valve and bolt, if required.
  4. Tighten the bolt to 10 N·m (89 lb in).

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


    Object Number: 1890391  Size: SH
  7. Connect the engine wiring harness electrical connector (2) to the intake CMP actuator solenoid valve (3), if required.
  8. Connect the engine wiring harness electrical connector (1) to the exhaust CMP actuator solenoid valve (4), if required.
  9. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.