For 1990-2009 cars

### Removal Procedure

1. Depressurize the fuel system. Refer to Fuel System Pressure Relief in Engine Fuel.
2. Disconnect the negative battery cable. Refer to

   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.

   in General Information.
3. Drain the coolant. Recover the coolant. Refer to Draining, Flushing and Filling the Cooling System in Cooling and Radiator.
4. Remove the intake manifold. Refer to Upper Intake Manifold Replacement and Lower Intake Manifold Replacement .
5. Remove the rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .

Important: Keep the valve lifters in order. You must install the lifters in the original position.

6. Remove the valve lifter guide bolts.
7. Remove the valve lifter guide.
8. Remove the valve lifter.

### Installation Procedure

1. Install the lifters into their original positions. Coat the valve lifter with GM P/N 1052365 or its equivalent.
2. Install the valve lifter guide.
3. Install the valve lifter guide bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).

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 rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
5. Install the intake manifold. Refer to Lower Intake Manifold Replacement and Upper Intake Manifold Replacement .
6. Refill the engine coolant. Refer to Draining, Flushing and Filling the Cooling System in Cooling and Radiator.
7. Connect the negative battery cable.