Lower Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Lower Intake Manifold

Courtesy of GENERAL MOTORS CORP.

Clean the intake manifold gasket mating surfaces (3) using GM P/N 12346139 (Canadian P/N 10953463) or equivalent.
Clean the fuel injector bores (1).
Inspect the lower intake manifold locating pins (2) for damage. Replace as necessary.
Inspect the intake manifold for damage.

IMPORTANT: If replacing the lower intake manifold, make sure to transfer or replace the locating pins as necessary.

Repair or replace the intake manifold as necessary.