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 intake plenum. Refer to Intake Plenum Replacement .
3. Remove the intake manifold. Refer to Intake Manifold Replacement .
4. Remove the relevant valve cover. Refer to Camshaft Cover Replacement .
5. Remove the intake air resonator. Refer to Intake Air Resonator Replacement in Engine Controls.
6. Remove the front timing belt cover. Refer to Timing Belt Cover Replacement .
7. Remove the timing belt. Refer to Timing Belt Replacement .
8. Remove the relevant camshaft sprocket(s). Refer to Camshaft Drive Sprocket Replacement .
9. Remove the relevant camshaft(s). Refer to Camshaft Replacement .
10. Remove the lifter(s) (1). Place the lifter(s) in a rack sequentially so they can be reinstalled in their original order if the lifter(s) is to be reused.

### Installation Procedure

1. Lubricate the lifter(s) (1) with prelube, GM P/N 12345501 or equivalent.
2. Install the lifter(s) in their original position if not replaced.
3. Install the relevant camshaft(s). Refer to Camshaft Replacement .
4. Install the relevant camshaft sprocket(s). Refer to Camshaft Drive Sprocket Replacement .
5. Install the timing belt. Refer to Timing Belt Replacement .
6. Install the front timing belt cover. Refer to Timing Belt Cover Replacement .
7. Install the intake air resonator. Refer to Intake Air Resonator Replacement .
8. Install the relevant valve cover. Refer to Camshaft Cover Replacement .
9. Install the intake manifold. Refer to Intake Manifold Replacement .
10. Install the intake plenum. Refer to Intake Plenum Replacement .
11. Connect the negative battery cable.
12. Reprogram the applicable accessories. Refer to Reprogramming Accessories After Battery Disconnect in Engine Electrical.