Case Side Cover: Inspection
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2003 Pontiac Montana, 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Pontiac Aztek, and 2003 Oldsmobile Silhouette. However, it is still accessible from the selected car via links, so may be relevant.
Inspect case side cover for damaged or porous gasket sealing surfaces, and damaged or stripped bolt holes. Inspect case side cover gasket and channel plate seal for damage. See Fig 1.