For 1990-2009 cars

### 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. Remove the valve rocker covers. Refer to Valve Rocker Arm Cover Replacement.

Important: Keep the components separated so they may be installed in the same location.

3. Remove the rocker arm bolts.
4. Remove the rocker arms.

Important: Keep the pushrods in order so that they can be installed in the original position.

5. Remove the pushrods.

### Installation Procedure

1. Install the pushrods in their original location.

• | Coat the ends of the pushrods and bearing surfaces of the rocker arms with prelube. Use GM P/N 12345501 or GM P/N 88862586 (Canadian P/N 992704 or Canadian P/N 88862586) or equivalent.

• | The intake pushrods are marked with yellow stripes and are 5 3/4 inches long.

• | Exhaust pushrods are marked with green stripes and are 6 inches long.

• | Ensure that the pushrods seat in the lifter.

2. Install the rocker arms.
3. Install the rocker arm pivot balls.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the rocker arm bolts.

Tighten
Tighten the bolts to 19 N·m (14 lb ft).

5. Install the valve rocker covers. Refer to Valve Rocker Arm Cover Replacement.
6. Connect the negative battery cable.