For 1990-2009 cars

1. Install a new intake manifold gasket.

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 intake manifold and bolts.

Tighten
Tighten the intake manifold bolts from the inside out to 10 N·m (89 lb in).

3. Install a new throttle control module gasket.
4. Install the throttle control module.
5. Add threadlock GM P/N 12346004 (Canadian P/N 10953480) to the throttle control module bolt threads.
6. Install the throttle control module bolts.

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