Diesel Auxiliary Tanks

Diesel auxiliary tanks, crafted from high-quality aluminum for safe and efficient extension of fuel capacity in pickup trucks, fully compliant with DOT standards for reliable on-the-go diesel storage and transfer. Available from trusted brands like RDS, ATI, and ATTA, these tanks offer capacities ranging from 18 to 110 gallons in various configurations including rectangle, L-shape, wedge, toolbox combos, and under-bed designs to fit short or long beds while optimizing space. Ideal for work trucks, commercial fleets, and specialty applications like generators or heavy equipment, our auxiliary tanks feature baffled construction for stability, installation kits for easy setup, and options for notched or lay-down styles to accommodate fifth wheels or sleepers. Whether you need a compact 40-gallon rectangle model or a larger 110-gallon unit for long-haul needs, explore our inventory for premium solutions that prioritize performance, corrosion resistance, and convenience.