WARNING: This page is about a different car, the 2004 Pontiac Sunfire, 2004 Chevrolet Classic, and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Bottom Pan & Gasket
Courtesy of GENERAL MOTORS CORP.
Remove the twelve oil pan bolts (81).
Remove the oil pan (88). The magnet can remain in the oil pan.
Remove the oil pan gasket (87). The oil pan gasket is reusable.