For 1990-2009 cars

## Intake Manifold Installation Lower VIN K

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 GM P/N 12345382 threadlocker or equivalent on the 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.

Tighten
Tighten the lower intake manifold 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).

## Intake Manifold Installation Upper

1. Install the upper intake manifold gasket.
2. Install the upper intake manifold.

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.

3. Install the upper intake manifold bolts.

Tighten
Tighten the upper intake manifold bolts in sequence to 10 N·m (89 lb in).

4. Install the throttle body.
5. Install the throttle body nuts.

Tighten
Tighten the throttle body nuts to 10 N·m (89 lb in).

6. Install the engine wiring harness shield bracket.
7. Install the engine wiring harness shield bracket bolt and nut.

Tighten
Tighten the engine wiring harness shield bracket bolt and nut to 10 N·m (89 lb in).

8. Install the accelerator control cable bracket.
9. Install the accelerator control cable bracket bolts.

Tighten
Tighten the accelerator control cable bracket bolts to 16 N·m (12 lb ft).

10. Install the fuel injector rail.
11. Install the fuel rail nuts.

Tighten
Tighten the fuel injector rail nuts to 10 N·m (89 lb in).

12. Install the spark plug wires.

## 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).