GM Service Manual Online
For 1990-2009 cars only

Fuel Tank Draining W/FFS

Tools Required

J 45004 Fuel Tank Drain Hose

Caution: Never drain or store fuel in an open container. Always use an approved fuel storage container in order to reduce the chance of fire or explosion.

Notice: Drain the fuel tank with a hose which has a 13 mm (0.5 in) or smaller diameter in order to prevent the drain hose from getting stuck inside the fuel tank filler neck pipe check valve. Damage to the check valve may result.

Notice: Drain the fuel from the complete system, including injector nozzle(s), the fuel pump, all fuel pipes, and the fuel tank if a vehicle is to be stored for any appreciable length of time. Draining the fuel will prevent the formations of fuel system deposits.

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the fuel tank filler pipe cap.
  3. Drain the fuel through the fuel tank filler pipe using a hand or air operated fuel pump device and the J 45004 .
  4. Remove the driveline support assembly. Refer to Driveline Support Assembly Replacement in Propeller Shaft.
  5. Remove the crossover tube/hose (1) from the clip (2) located above the transmission.
  6. Remove the crossover tube/hose from the RH fuel tank. Refer to Fuel Tank Crossover Tube Replacement .
  7. Drain the fuel through the fuel tank crossover connection (1) using a hand or air operated fuel pump device and the J 45004 .

Fuel Tank Draining W/O FFS

Tools Required

    • J 34730-1A Fuel Pressure Gauge
    • J 37088-A Tool Set, Fuel Line Quick Connect Separator

    Object Number: 107978  Size: SH

    Caution: Always wear safety goggles when working with fuel in order to protect the eyes from fuel splash.

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove both of the rear wheel and tire assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  4. Attach a length of flexible fuel hose to an air operated pump device.
  5. Position an approved drain container under the left tank fuel sender.
  6. Wrap a shop towel around the left tank fuel feed rear pipe (4).
  7. Disconnect the fuel feed rear pipe (4) at the left tank fuel sender using J 37088-A .
  8. Attach the flexible fuel hose from the pump device to the fuel feed pipe nipple (5) using a screw-type clamp.
  9. Drain the left fuel tank until no fuel comes out.
  10. Disconnect the pump device from the left tank fuel feed pipe nipple (5).
  11. Cap the fuel feed pipe nipple (5) and the fuel feed rear pipe (4).

  12. Object Number: 43562  Size: SH
  13. Position an approved drain container under the right tank fuel sender.
  14. Wrap a shop towel around the auxiliary fuel return rear pipe that connects the (3) jet pump to the left tank at the right fuel sender.
  15. Disconnect the auxiliary fuel return rear pipe that connects the (3) jet pump to the left tank at the right tank fuel sender using J 37088-A .
  16. Attach the flexible fuel hose from the pump device to the auxiliary fuel return rear pipe (3) nipple using a screw type clamp.
  17. Drain the right tank until no fuel comes out.
  18. Disconnect the pump device from the right tank fuel sender nipple.
  19. Cap the auxiliary fuel return rear pipe nipple (3) and the auxiliary fuel return rear pipe.