Fuel Tank Draining (Dual Tanks - Rear)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

J-45004 Fuel Tank Siphon Hose

Fig 1: View Of Fuel Tank Filler Housing To Body Screws & Retainer

Courtesy of GENERAL MOTORS COMPANY

WARNING:

Refer to Gasoline/Gasoline Vapors Warning .

Remove the fuel fill cap.
Remove the fuel tank filler housing to body TORX® screws (1) and retainer (2).

Fig 2: Identifying Fuel Filler Components

Courtesy of GENERAL MOTORS COMPANY

Remove the fuel tank filler housing to fuel tank fill pipe screws.
Remove the filler housing.

Fig 3: View Of Fuel Hoses & Clamp

Courtesy of GENERAL MOTORS COMPANY

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Loosen the fill hose clamp (3) at the rear tank.
Remove the fill hose from the rear tank.
Insert the siphon hose from the J-45004 fuel tank siphon hose into the fuel tank.
Attach the siphon hose from the J-45004 fuel tank siphon hose to the pump devise.
Using a hand or air operated pump device, drain as much fuel from the tank as possible.