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 coil harness.
  3. Remove the ignition coils from the valve rocker arm cover. Refer to Ignition Coil Replacement in Engine Electrical.

  4. Object Number: 260078  Size: SH
  5. Remove the Positive Crankcase Ventilation (PCV) valve (2) and the hose (1) from the left valve rocker arm cover.

  6. Object Number: 260085  Size: SH
  7. Remove the valve rocker arm cover from the engine. Refer to Valve Rocker Arm Cover Removal
  8. Clean and inspect the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection

Installation Procedure


    Object Number: 260085  Size: SH
  1. Install the valve rocker arm cover to the engine. Refer to Valve Rocker Arm Cover Installation

  2. Object Number: 260078  Size: SH
  3. Install the PCV valve (2) and the hose(1) to the left valve rocker arm cover.
  4. Install the ignition coils to the valve rocker arm cover. Refer to Ignition Coil Replacement in Engine Electrical.
  5. Connect the negative battery cable.