How do you change a 2000 Cadillac Seville fuel pump?

To change the fuel pump on a 2000 Cadillac Seville, start by disconnecting the negative battery cable to ensure safety. Then, relieve the fuel system pressure by removing the fuel pump relay and running the engine until it stalls. Next, access the fuel pump by removing the rear seat and the access panel or dropping the fuel tank, depending on the design. Finally, disconnect the fuel lines and electrical connectors, replace the old pump with the new one, and reassemble everything in reverse order.