GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the battery negative cable.

  2. Object Number: 64534  Size: SH
  3. Remove the valve rocker arm cover from the cylinder head. Refer to Valve Rocker Arm Cover Replacement .

  4. Object Number: 354070  Size: SH
  5. Remove the valve rocker arm bolts from the cylinder head.
  6. Important: Store the valve train components in order so that the components can be reassembled in the same location.

  7. Remove the following from the cylinder head:
  8. • The valve rocker balls
    • The arms
    • The valve pushrod guides

    Object Number: 202196  Size: SH

    Important: The exhaust valve pushrods are longer than the intake valve pushrods.

  9. Remove the valve pushrods from the engine block.

Installation Procedure

Important: Ensure that the pushrod is properly seated in the valve lifter.


    Object Number: 202196  Size: SH

    Important: The 7.4L engine uses different length intake and exhaust valve pushrods.

    The exhaust valve pushrods are longer than the intake valve pushrods.

  1. Install the valve pushrods in the engine block.
  2. Install the following into the cylinder head:
  3. • The valve pushrod guides
    • The valve rocker balls
    • The valve rocker arms

    Object Number: 354070  Size: SH

    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.

  4. Install the valve rocker arm bolts to the cylinder head.
  5. Tighten
    Tighten The bolts to 54 N·m (40 lb ft).


    Object Number: 64534  Size: SH
  6. Install the valve rocker arm cover to the cylinder head. Refer to Valve Rocker Arm Cover Replacement .
  7. Connect the battery negative cable.