A: It is recommended to remove the fuel tank when it is nearly empty. If that is not possible, try to siphon out the fuel before removing the tank. To begin, relieve the fuel system pressure and disconnect the cable from the negative battery terminal. Raise the vehicle and secure it on jackstands. If there is still fuel in the tank, disconnect the quick-connect fitting for the fuel inlet line at the fuel filter and siphon or hand-pump the remaining fuel. Remove the intermediate exhaust pipe and muffler, followed by the rear heat shield. Disconnect the electrical connector for the Fuel Pump/fuel level sensor module and the connector for the EVAP canister vent solenoid hose. Disconnect the fuel filler neck hose and the vent hose for the fuel limit vent valve at the fuel tank. Disconnect the fuel tank ground strap and remove the rock guards. Disconnect the connector on the outlet side of the fuel filter. Support the fuel tank with a transmission jack or a floor jack, ensuring to protect the tank. Remove the fuel tank strap bolts and lower the tank partially to detach any remaining cables, hoses, or lines. Finally, lower the tank completely and proceed with the installation in reverse order. After disconnecting the battery, the Powertrain Control Module (PCM) will need to relearn its former driveability and performance characteristics.
Q: What is the approved service for a plastic fuel tank that cannot be repaired on Saturn LS,LS1?
A: The fuel tank is made of plastic and cannot be repaired. There are no reliable procedures available to fix leaks or damage, so the only approved service is to replace the fuel tank. To remove sediment from the bottom of the tank, it should be steam-cleaned. Before cleaning, the Fuel Pump/level sending unit module and all EVAP system components should be removed. After cleaning, the tank should be allowed to air dry thoroughly before being put back into service.