Inspection (Right)
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Clean sealant from intake manifold and cylinder head sealing surface. Clean intake manifold in cleaning solvent and air dry. Inspect intake manifold for cracking, distortion, and any damage. Replace intake manifold if any of the conditions exist.