Intake Manifold Clean And Inspect (Unit Repair)

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Clean intake manifold mating surfaces.
Inspect intake manifold for damage.
Inspect intake manifold for cracks near compression limiters.
Inspect crankcase ventilation passages in intake manifold face for blockage and clean as necessary.
Clean crankcase ventilation passages with compressed air. Use a maximum of 172 kPa (25 psi) of air pressure.
Replace intake manifold as necessary.

Fig 1: Cleaning And Inspecting Intake Manifold
Courtesy of GENERAL MOTORS CORP.