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: 848000  Size: SH
  9. Disconnect the electrical connector from the rocker arm oil pressure switch.
  10. Disconnect the electrical connector from the rocker arm oil control solenoid (1).
  11. Remove the 3 bolts (4) from the rocker arm oil control solenoid housing (2).
  12. Remove the 2 nuts (3) and the rocker arm oil control solenoid housing (2) and gasket from the cylinder head.

  13. Object Number: 848001  Size: SH
  14. Remove the oil filter (1) from the oil passage in the cylinder head.

Installation Procedure


    Object Number: 848001  Size: SH
  1. Install the oil filter (1) of the rocker arm oil control solenoid valve into the oil supply passage of the cylinder head.

  2. Object Number: 848000  Size: SH
  3. Install the rocker arm oil control solenoid housing (2) with gasket onto the cylinder head.
  4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Secure the housing to the cylinder head with the two nuts (3) and the three bolts (4).
  6. Tighten
    Tighten the fasteners to 9 N·m (80 lb in).

  7. Connect the electrical connector to the rocker arm oil control solenoid (1).
  8. Connect the electrical connector to the rocker arm oil pressure switch.

  9. Object Number: 850214  Size: SH
  10. Connect the PCV hose (1) and the PCV breather hose (2) to the engine.
  11. Connect the EVAP hoses.

  12. Object Number: 828878  Size: SH
  13. Install the engine cover (1) to the engine.
  14. Secure the engine cover (1) with the four fasteners.
  15. Tighten
    Tighten the fasteners to 7 N·m (62 lb in).