Some trucks come with dual gas tanks to increase fuel capacity and extend driving range. This setup is especially common in older pickups, heavy‑duty work trucks, and vehicles intended for long‑distance travel or remote operations.
How Dual Gas Tanks Work
A dual‑tank system uses a main tank that supplies fuel directly to the engine and a secondary (auxiliary) tank. Fuel is either transferred from the secondary to the main tank via a pump or selected through a valve system that lets the driver choose which tank to use.
Trucks With Factory Dual Gas Tanks
Ford
- Older Ford F‑150, F‑250, and F‑350 models from the 1980s and 1990s often had dual tanks with a dashboard selector switch.
- Some Super Duty fleet and chassis cab models can still be ordered with auxiliary tanks.
Chevrolet / GMC
- Pre‑2000 Chevy C/K and GMC Sierra pickups commonly offered dual tanks.
- Heavy‑duty and commercial variants may still offer auxiliary tanks as an option.
Dodge / Ram
- Older Dodge Ram trucks sometimes came with dual tanks in work truck configurations.
Toyota
- Land Cruiser 70 Series pickups in markets like Australia and Africa often feature dual diesel tanks from the factory.
Aftermarket & Commercial Options
Even if a truck doesn’t come with dual tanks from the factory, many commercial trucks, service vehicles, and overlanding builds use aftermarket auxiliary tank systems to increase range.