Fuel filter mounted on the side of the frame
The fuel filter on the 2002 GMC Safari Van is located underneath the driver's side running board, inside the frame. The fuel filter is a cylindrical-shaped object with two fuel lines connected to it.
Fuel Filter located in the engine bay
The second fuel filter is located inside the engine bay, attached near the fuel injector rail. Locate the metal tube that carries fuel from the fuel pump to the fuel injector rail. There will be a black filter canister in this fuel line.