How do you Replace fuel pump on a gmc savana 2500?

To replace the fuel pump on a GMC Savana 2500, first relieve the fuel system pressure by removing the fuel pump relay and starting the engine until it stalls. Next, disconnect the battery and remove the fuel tank, which may require lowering it and unbolting any straps. Once the tank is removed, access the fuel pump from the top of the tank, disconnect the fuel lines and electrical connectors, then remove the pump assembly. Install the new pump by reversing the process, ensuring all connections are secure before reassembling the tank and reconnecting the battery.