1. Install the intake manifold and gaskets.
Notice: Refer to Fastener Notice in Cautions and Notices.
2. Install the intake manifold bolts/studs and fuel line clips.
• Use teflon sealer to seal the four bolts, numbers 9, 11, 13, and 15 that are exposed to the crankcase.
• Apply threadlocker GM P/N 12345493 to the threads of the bolts and the studs that are not numbered 9, 11, 13, or 15.
Tighten
Tighten the intake manifold bolts/studs, in sequence, to 42 N-m (31 Ib ft).
3. install the hoses and the clamps to the fuel filter assembly.
4. Install the fuel filter assembly and the engine wiring harness bracket.
Tighten
Tighten the fuel filter mount bolts to 42 N-m (31 Ib ft).
5. If equipped, install the upper intake manifold.
Refer to Intake Manifold Installation (Upper-L65)
