If the tank is full or nearly full, drive the vehicle to use up the gas. Relieve the fuel pressure. Detach the cable from the negative terminal of the battery, ensuring that on models equipped with the Delco Loc II audio system, the lockout feature is turned off before disconnecting the battery. Raise the vehicle and place it securely on jackstands. Locate the wire harness connector for the electric
Fuel Pump and fuel gauge sending unit in front of the tank, and unplug it. If the vehicle doesn't have a connector, disconnect the fuel feed and return lines, the vapor return line, and the filler neck and vent tubes. Support the fuel tank with a floor jack. Disconnect both fuel tank retaining straps by removing the fuel tank strap retaining bolts. Lower the tank enough to disconnect the wires and ground strap from the fuel pump/fuel gauge sending unit, if not already done. Remove the tank from the vehicle. Installation is the reverse of removal.