GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 828878  Size: SH
  1. Remove the four fasteners from the engine cover (1).
  2. Remove the engine cover (1) from the engine.

  3. Object Number: 850214  Size: SH
  4. Disconnect the PCV hose (1) from the PCV valve.
  5. Disconnect the PCV breather hose (2).
  6. Disconnect the EVAP hose (3).
  7. Swing the two PCV hoses and the EVAP hose away from the cylinder head.

  8. Object Number: 860902  Size: SH
  9. Disconnect the electrical connector from the rocker arm oil pressure switch.
  10. Remove the the rocker arm oil pressure switch (2) from the rocker arm oil control solenoid housing (1).

Installation Procedure


    Object Number: 860902  Size: SH

    Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

  1. Install the the rocker arm oil pressure switch (2) into the rocker arm oil control solenoid housing (1).
  2. Tighten
    Tighten the switch to 13 N·m (9.5 lb ft).

  3. Connect the electrical connector to the rocker arm oil pressure switch.

  4. Object Number: 850214  Size: SH
  5. Connect the PCV hose (1) and the PCV breather hose (2) to the engine.
  6. Connect the EVAP hoses.

  7. Object Number: 828878  Size: SH
  8. Install the engine cover (1) to the engine.
  9. Secure the engine cover (1) with the four fasteners.
  10. Tighten
    Tighten the fasteners to 7 N·m (62 lb in).