Diesel Auxiliary Fuel Tanks

We make the purchase and installation of Diesel Auxiliary Fuel Tanks easy. We manufacture our diesel fuel tanks specifically for our fuel shotz installation kit. The kit comes with the tank so we take all the “guess work” out of it. To choose the diesel fuel system that’s right for you follow these two simple steps. First, choose a tank that is the correct size and capacity from the dimensional chart below or use our online catalog, Second, use the installation kit chart below to find the kit for the year and make of your diesel fuel truck


This diesel installation kit can be installed in less than an hour. The unique system connects the auxiliary tank to the factory tank via the factory filler. The auxiliary tank keeps the factory tank full. When the auxiliary tank is empty your factory fuel gauge will move off the full mark. The system installs quickly and easily. No wires or switches to install. The system has rollover protection on the tank and on the factory fill neck adapter. Detailed Instructions are supplied with the Fuel Shotz installation kit.

  • All aluminum fuel tank construction
  • Tank Dimensions
  • Quick easy installation
  • Tanks are baffled to reduce movement of contents
  • No wires or switches to install
  • Rollover protection
  • Automotive style fill cap
  • Hold down brackets
  • Pressure and leak detection test
  • Clean and free of debris inside and outside of the tank
  • 1 year limited warranty

Our fuel tank/toolbox combos take fuel security to a whole new level! The fuel filler and fittings are inside a compartment under the lockable lid of the toolbox. The fill and fittings are in a compartment that is separated from the toolbox storage area. The toolbox has its own floor unlike others who offer an economy tank/toolbox combo that uses the top of the fuel tank as the toolbox floor. The tank/toolbox combo gives you “Security for your fuel”. For added security to an Auxiliary Fuel Tank without a toolbox we offer lockable automotive auxiliary fuel caps.


Toolbox features:

  • Fuel fittings separated from storage area
  • HD aluminum toolbox construction
  • Stainless locking handles
  • Lid opens a full 90 degrees for easy access
  • Lid suspended by automotive style gas springs
  • 3 layer rigid lid design for extreme use
  • Full aluminum piano hinge
  • Offset hinged area to allow for lid clearance
  • Optional powdercoat available

Optional Diesel Auxiliary Fuel Tank features:

  • Locking automotive style auxiliary fuel cap
  • Custom size and configuration
  • Black or white powder coat
  • Tank mount fuel level gauge
  • Fuel level sender with dash mount gauge
  • Added fittings
  • Toolbox for storage
  • Available in powder coat finish
Powdercoat diesel auxilary tank


Locking Auxiliary Fuel Cap Powdercoat diesel auxilary tank     Fuel Level Gauge     Fuel level sender with dash mount gauge
Locking automotive
auxiliary fuel cap
Black or white
powder coat
Tank mount
fuel level gauge

Fuel level sender with
dash mount gauge


Auxiliary Tank Toolbox Combos

Auxiliary Tank and Toolbox combos are great, secure solutions for tool and equipment storage as well as having the extra diesel fuel capacity for your long trips!

The toolbox features:

  • All polished aluminum DP body construction
  • Polished industrial stainless locking handles
  • Automotive style gas shocks for lid
  • Extreme 3 layer lid design
  • Full aluminum piano hinge
  • Aero-beveled lid design

L-shape Diesel Auxiliary Fuel Tanks

Our L-shape Auxiliary Tanks were designed to be used with a crossover style toolbox or chest box. The bottom of the L-shape fits under most standard toolboxes. The L shape also allows for clearance in most 5th wheel applications. L-Shape Diesel Auxilairy Fuel Tank

Rectangle Diesel Auxiliary Fuel Tanks

The rectangle aluminum Auxiliary Tank is the most popular in the lineup. Our standard diesel auxiliary fuel tanks range from 30 to 80 gallons. If you want to keep most of your bed space check out our more slender aluminium fuel tank designs, some only require 9”. We also have a lay down style that fits under most crossover toolboxes. Rectangle Diesel Auxiliary Fuel Tank


Wedge Diesel Auxiliary Fuel Tanks

The Wedge style aluminum Auxiliary Fuel Tank is an ideal choice for flat beds and pickups with a 5th wheel. The tank slopes at a 45 degree angle on the tailgate side of the fuel tank for easy viewing and 5th wheel clearance. Wedge Diesel Auxiliary Fuel Tank


Custom Diesel Auxiliary Fuel Tanks

Can’t find exactly what you’re looking for? We build custom auxiliary tanks, transfer tanks, auxiliary fuel tanks, double wall tanks, DEF tanks, and more. If you have a complete custom design or just need us to take an inch off here and there, that’s not a problem, and odds are we’ve probably already built some! We build custom fuel tanks everyday; we may even have a design that is right for your application. Feel free to contact us to discuss the details or just get some design advice. Whether its one or one thousand pieces we will be happy to assist you. diesel1


 FUEL SHOTZ LOGO Diesel Auxiliary Installation Kit Only

The auxiliary fuel tank installation kit is used to connect the auxiliary fuel tank to the factory fuel tank via the factory fill tube. The kit contains everything you need to make the connection from the auxiliary tank with a 3/8” NPT bottom fitting to the factory fill tube. These kits are supplied with detailed instructions and take less than an hour to install.

  • No wires or switches to install
  • Rollover protection
  • Requires a 3/8” npt bottom fitting on auxiliary tank
  • Quick easy installation
FUEL SHOTZ Diesel Auxiliary Install Kit

Installation Kit Chart

Vehicle Description

Part #

Ford/Dodge/2011-C GM


GM Models thru 2010


Click Here to view our online Diesel Auxiliary Tank catalog

Our Mission

Our mission is to provide the safest fuel tanks on the market. Quality is the first defense in assuring a safe fuel tank and we take that Serious!

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