GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1647538  Size: SH
  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
  2. Disconnect the intake (3) or exhaust (2) camshaft position actuator solenoid valve electrical connector, as required.

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

Installation Procedure

    Caution: Refer to Fastener Caution 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, as required.
  3. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

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


    Object Number: 1647538  Size: SH
  6. Connect the intake (3) or exhaust (2) camshaft position actuator solenoid valve electrical connector, as required.
  7. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.