Oil Pan
WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The structural oil pan is cast aluminum. Incorporated into the design are the oil filter mounting boss, drain plug opening, oil level indicator tube opening, and oil pan baffle. An internal tube assembly directs pressurized oil from the engine block to the oil filter which is mounted in the center area of the pan. Filtered oil is then returned to the engine block through the tube assembly into the engine block oil galleries. The alignment of the structural oil pan to the rear of the engine block and transmission bell housing is critical.