GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 262520  Size: SH

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative (-) battery cable.
  2. Remove the two crankcase vent hoses (1,2) from the valve cover.
  3. Remove the secondary spark plug wire retaining clamps and spark plug wires from the valve cover.
  4. Remove the six valve cover bolts.

  5. Object Number: 262523  Size: SH
  6. Remove the valve cover (2) from the cylinder head.
  7. Remove the valve cover gasket (1) and seals (3) from the valve cover.

Installation Procedure


    Object Number: 262523  Size: SH
  1. Install the new valve cover gasket (1) to the valve cover (2).
  2. Install the new valve cover seals (3) to the valve cover (2).

  3. Object Number: 262520  Size: SH
  4. Install the valve cover to the cylinder head.
  5. 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.

  6. Secure the valve cover with the six bolts.
  7. Tighten
    Tighten the cylinder head cover bolts to 11N·m (8 lb ft).

  8. Install the secondary spark plug wire retaining clamps and spark plug wires to the valve cover.
  9. Install the two crankcase vent hoses (1,2) to the valve cover.
  10. Connect the negative battery cable. Refer to Battery Replacement in Engine Electrical.