For 1990-2009 cars

1. Install a new camshaft cover seal.

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.

2. Install the camshaft cover and bolts.

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

3. Install new ignition control module seals.
4. Install the ignition control modules and bolts.

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

5. Add sealer GM P/N 12346004 (Canadian P/N 10953480) to the coolant temperature sensor threads.
6. Install the coolant temperature sensor.

Tighten
Tighten the coolant temperature sensor to 16 N·m (12 lb ft).