How do you remove and replace the fuel filter on a 1999 Cadillac Deville?

To remove and replace the fuel filter on a 1999 Cadillac DeVille, first relieve the fuel system pressure by removing the fuel pump relay and starting the engine until it stalls. Next, locate the fuel filter along the fuel line under the car, usually near the rear wheel. Disconnect the fuel lines from the filter using appropriate tools, then remove the filter and replace it with a new one, ensuring the flow direction matches the old filter. Finally, reconnect the fuel lines, reinstall the fuel pump relay, and start the engine to check for leaks.