Important: The intake manifold, throttle body, fuel injection rail and fuel injectors may be removed as an assembly. If not servicing the individual components, install the intake manifold as a complete assembly.

1. Install NEW intake manifold-to-cylinder head gaskets.



2. Install the intake manifold.
3. Apply a 5 mm (0.20 in) band of threadlock GM P/N 12345382 or equivalent to the threads of the intake manifold bolts.



4. Note the location of the fuel rail ground strap (1) on the intake manifold.

The fuel rail ground strap must be installed during assembly.





Caution: The fuel rail stop bracket must be installed onto the engine assembly. The stop bracket serves as a protective shield for the fuel rail in the event of a vehicle frontal crash. If the fuel rail stop bracket is not installed and the vehicle is involved in a frontal crash, fuel could be sprayed possibly causing a fire and personal injury from burns.

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 intake manifold bolts and fuel rail stop bracket.

Tighten

1. Tighten intake manifold bolts (1-10) a first pass in sequence to 5 N·m (44 lb in).
2. Tighten intake manifold bolts (1-10) a final pass in sequence to 10 N·m (89 lb in).



6. Lubricate the grommet of the Manifold Absolute Pressure (MAP) sensor with clean engine oil.
7. Install the MAP sensor (if previously removed).