For 1990-2009 cars

## Intake Manifold Installation Lower VIN 1

1. Clean the lower intake manifold sealing surface using GM P/N 12346139 (Canadian P/N 10953463) or equivalent prior to installing any seals or gaskets.
2. Install the lower intake manifold gasket.
3. Install the lower intake manifold.
4. Apply Threadlocker 272 GM P/N 12345493 to the bolt threads.

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.

5. Install the lower intake manifold bolts including the two hidden bolts.

Tighten
Tighten the bolts in sequence to 15 N·m (11 lb ft).

6. Install the EGR outlet pipe to the intake manifold.
7. Install the EGR outlet pipe bolt.

Tighten
Tighten the EGR outlet pipe bolt to 29 N·m (21 lb ft).