How do you change the fuel filter 2000 Cadillac deville?

To change the fuel filter on a 2000 Cadillac DeVille, first, relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Then, locate the fuel filter, which is typically found along the fuel line under the vehicle. Disconnect the fuel lines from the filter using a line wrench, replace the old filter with a new one, ensuring the flow direction is correct, and reconnect the fuel lines. Finally, reinstall the fuel pump fuse, turn the ignition to the "ON" position to prime the system, and check for leaks.