GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  2. Remove the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  3. Remove the upper intake manifold (VIN K). Refer to Intake Manifold Replacement .
  4. Remove the supercharger (VIN 1). Refer to Supercharger Replacement .
  5. Remove the lower intake (VIN K). Refer to Intake Manifold Replacement .
  6. Remove the lower intake (VIN 1). Refer to Intake Manifold Replacement .
  7. Remove the rocker arm bolt(s), bearing(s), rocker arm(s) and retainer(s). Refer to Valve Rocker Arm and Push Rod Replacement .
  8. Important: Ensure that all valve train parts are kept in order so that they can be reinstalled in their original locations and with the same mating surfaces as when removed.


    Object Number: 35818  Size: SH
  9. Remove the pushrod(s).

  10. Object Number: 41374  Size: SH
  11. Remove the valve lifter guide bolts.
  12. Remove the valve lifter guide(s).
  13. Remove the valve lifter(s).
  14. Clean all gasket surfaces with degreaser.
  15. Clean the valve train parts.
  16. Inspect the valve lifters for wear.
  17. Inspect the cam lobes for wear.

Installation Procedure


    Object Number: 41374  Size: SH
  1. Dip the valve lifter(s) in prelube engine oil before installation.
  2. Install the valve lifter(s).
  3. Install the valve lifter guide(s).
  4. Install the valve lifter guide bolts.
  5. Tighten
    Tighten the bolts to 30 N·m (22 lb ft).

    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.


    Object Number: 35818  Size: SH
  6. Install the pushrod(s).
  7. Install the retainer, rocker arm(s), bearing(s) and bolt(s). Refer to Valve Rocker Arm and Push Rod Replacement .
  8. Install the lower intake (VIN 1). Refer to Intake Manifold Replacement .
  9. Install the lower intake (VIN K). Refer to Intake Manifold Replacement .
  10. Install the supercharger (VIN 1). Refer to Supercharger Replacement .
  11. Install the upper intake manifold (VIN K). Refer to Intake Manifold Replacement .
  12. Install the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  13. Install the left valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .