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Auxiliary fuel tanks from 30 to 80 gallons that refill your pickup's main tank from the bed, adding range for long hauls and remote work. Diamond plate aluminum rectangle, wedge and L-shape tanks that meet DOT requirements for auxiliary fuel tanks, for diesel or gasoline.
Comparing auxiliary and transfer tanks? Start with our Truck Bed Fuel Tank Buying Guide.
An auxiliary tank is extra fuel for your own truck, not a tank you dispense from. Our tanks from Aluminum Tank Industries mount in the bed and feed your factory tank, and the fuel your truck burns decides how they connect.
Diesel can be drawn from the bottom of a tank, so a diesel auxiliary tank feeds your factory tank by gravity through a Fuel Shotz kit at the fill neck, with nothing to wire. The same tank can also feed a generator or other equipment. Shop diesel auxiliary tanks.
Gasoline must be drawn from the top, so a gasoline auxiliary tank moves fuel through a small inline pump with a toggle switch in the cab, which you buy separately. The tank itself arrives with pickup and return fittings built in. Shop gasoline auxiliary tanks.
More capacity means fewer fuel stops, but fuel is heavy, so check the payload rating on your door jamb sticker before sizing up. Diesel tanks reach 80 gallons with the L-shape, while gasoline tanks top out at 66.
Measure your bed with the mounting tabs and fuel cap in mind before you choose. Fueling equipment rather than your own truck? Shop truck bed transfer tanks. Not sure which tank and kit fit? Request a quote.