Intake Manifold Cleaning and Inspection

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Clean the intake manifold gasket mating surface.

Fig 1: Intake Manifold Cleaning And Inspection

Courtesy of GENERAL MOTORS CORP.

Inspect the threads on the retaining bolts.
Inspect the intake manifold for cracks.
Replace the intake manifold if necessary.