For 1990-2009 cars

1. Install the rear timing belt cover.

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 rear timing belt cover bolts.

Tighten
Tighten the rear timing belt cover bolts to 8 N·m (71 lb in).

3. Coat the threaded pin with thread locking compound, GM P/N 12345382 or equivalent.
4. Install the rear timing belt cover threaded pin.

Tighten
Tighten the rear timing belt cover threaded pin to 10 N·m (89 lb in).