How do you replace a fuel pump on a 1994 Chevy Astro?

To replace the fuel pump on a 1994 Chevy Astro, first, relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Disconnect the battery, then access the fuel pump by removing the fuel tank. After supporting the tank, disconnect the fuel lines and electrical connections from the pump. Remove the old pump and install the new one, reassembling everything in reverse order, and ensure all connections are secure before reconnecting the battery and starting the vehicle.