How do you change oil pan gasket on 2001 Cadillac Seville?

To change the oil pan gasket on a 2001 Cadillac Seville, first, ensure the vehicle is safely lifted and supported. Drain the engine oil and remove the oil pan by unbolting it from the engine block, taking care to note the positioning of any components. Clean the surfaces of the oil pan and engine block, then place a new gasket in position and reattach the oil pan with new bolts as necessary. Finally, refill the engine with oil and check for leaks after starting the engine.