Fuel Tank Draining (Rear Tank)

Special Tools 

J-45004  Fuel Tank Siphon Hose

Fig 1: Fuel Tank Filler Housing To Body Screws And Retainer
Courtesy of GENERAL MOTORS COMPANY
WARNING:

Refer to Diesel/Gasoline Vapors Warning .

1. Remove the fuel fill cap.
2. Remove the fuel tank filler housing to body TORX® screws (1) and retainer (2).
Fig 2: Fuel Tank Filler Housing Components
Courtesy of GENERAL MOTORS COMPANY
3. Remove the fuel tank filler housing to fuel tank fill pipe screws.
4. Remove the filler housing.
Fig 3: Fuel Hoses And Clamp
Courtesy of GENERAL MOTORS COMPANY
5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
6. Loosen the fill hose clamp (3) at the rear tank.
7. Remove the fill hose from the rear tank.
8. Insert the siphon hose from the J-45004  fuel tank siphon hose into the fuel tank.
9. Attach the siphon hose from the J-45004  fuel tank siphon hose to the pump devise.
10. Using a hand or air operated pump device, drain as much fuel from the tank as possible.