Lower Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. 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 using GM P/N 12346139 (Canadian P/N 10953463) or equivalent.
Clean the fuel injector bores.
Inspect the intake manifold for damage.
Repair or replace the intake manifold as necessary.