- Install a new intake manifold gasket uniformly into the intake manifold flange groove.
- Install the intake manifold.
- Install the intake manifold bolts.
- Install the rear EGR port cover to the cylinder head.
- Apply GM P/N United States 12345493, GM P/N Canada 10953488, or equivalent, to the EGR port cover to cylinder head bolt threads.
- Install the rear EGR port cover to cylinder head bolts.
- Install the throttle body to the 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.
Tighten
Tighten the bolts in sequence to 24 N·m (17 lb ft).
Tighten
Tighten the rear EGR port cover bolts to 11 N·m (97 lb in).
Tighten
Tighten the throttle body to intake manifold bolts to 10 N·m
(89 lb in).
