GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    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. Disconnect the positive battery cable.
  3. Remove the battery from the battery tray. Refer to Battery Replacement in Engine Electrical.
  4. Remove the camshaft. Refer to Camshaft Replacement .

  5. Object Number: 262298  Size: SH
  6. Unclip and remove the intake rocker arms (1) from the rocker-arm shaft.

  7. Object Number: 262294  Size: SH
  8. Remove the 6 rocker-arm shaft bolts (1).

  9. Object Number: 262352  Size: SH
  10. Carefully slide the rocker-arm shaft (2) out of the cylinder head while removing the exhaust rocker arms (1) and the springs from the rocker-arm shaft.

Installation Procedure

  1. Apply clean engine oil to the following components:
  2. • Rocker Arm Shaft
    • Rocker Arms (2)

    Object Number: 262286  Size: SH
  3. After you apply the engine oil to the rocker-arm shafts and to the rocker arms, do the following.Carefully slide the rocker-arm shaft into the cylinder head with the holes facing, while installing the exhaust rocker arms and the springs in the correct sequence.

  4. Object Number: 262294  Size: SH
  5. Install the rocker-arm shaft bolts (1).
  6. Tighten
    Tighten the rocker-arm shaft bolts to 11 N·m (97 lb in).


    Object Number: 262298  Size: SH
  7. Install the intake rocker arms (1) onto the rocker-arm shaft in the correct sequence.
  8. Install the camshaft. Refer to Camshaft Replacement in Engine Mechanical.
  9. Install the battery. Refer to Battery Replacement in Engine Electrical.
  10. Install the positive battery cable.
  11. Connect the negative battery cable.