What trucks have two gas tanks?
Very few modern consumer pickups come with two gas tanks; when you see it, it’s usually an older heavy‑duty model or a special fleet/long‑range configuration with an auxiliary tank.
Two-tank setups exist primarily to extend driving range for long trips, heavy hauling, or specialized fleet use. This article explains what a dual-tank system is, how common it is today, and which trucks have historically offered it, along with practical tips for identifying such configurations.
Understanding dual fuel-tank setups
A dual fuel-tank system provides a second reservoir for gasoline beyond the primary tank. The idea is straightforward: one tank powers regular driving, while the auxiliary tank can be used to extend range, reduce the need for frequent stops, or accommodate fleets that log long miles between refueling. In practice, the secondary tank is often accessed via a separate filler neck and may show up as a second gauge or a distinct fuel-level readout in the instrument cluster.
Two tanks in current models: status and trends
In today’s mainstream pickup market, two-tank configurations are uncommon. Most new light-duty trucks are designed with a single fuel tank and optional alternative powertrains (hybrids, diesels, or fully electric). When two tanks appear, they’re typically in older model years, special fleet/taxi or governmental variants, or as aftermarket installations rather than as standard production features.
Historical examples of dual-tank trucks
Several full-size and heavy-duty pickups from past decades are frequently cited as having factory dual-fuel-tank setups. Availability varied by year, trim, and region, and these configurations are rarely seen on new models today. Below are models commonly referenced by owners and service literature as having had dual-tank options.
- Ford F-Series Super Duty (F-250/F-350) — In certain generations, the Super Duty lineup offered an optional auxiliary fuel tank, primarily for fleet or long-haul use.
- Chevrolet Silverado 2500HD / GMC Sierra 2500HD — Some years provided an auxiliary fuel tank option on heavy-duty pickups, often aimed at commercial customers.
- Dodge Ram 2500 / Ram 3500 — Certain mid-to-late-1990s through early-2000s configurations offered a secondary tank as a factory option or dealer-installed accessory.
Note: The availability of dual tanks on these models depended on the year, market, and specific trim or fleet package. Modern iterations of these vehicles typically use a single large tank unless a specialized aftermarket system is installed.
How to identify a dual-tank configuration on a truck you’re considering
If you’re shopping for a used truck and want to verify whether it has two fuel tanks, use the following checks:
- Inspect the exterior for two filler caps or a second filler neck, often located on opposite sides of the vehicle or near the rear wheel arches.
- Consult the window sticker, owner’s manual, or dealer records for references to an "auxiliary fuel tank" or "two-tuel/two-tank system."
- Look for separate fuel-level indicators or gauges in the instrument cluster, indicating more than one tank.
- Ask the seller or dealer to show the second fuel tank location under the vehicle and confirm its capacity and purpose (reserve range, fleet use, etc.).
If a vehicle is equipped with an aftermarket dual-tank system, the setup is typically documented in the service history, and there may be warranty or insurance implications to consider. Always verify via official documentation or a qualified mechanic.
What to consider if you think you need extra range
If extended range is your goal, you have options beyond a dual-tank setup, including modern long-range single-tank configurations, improved fuel economy, or alternative powertrains. In some cases, aftermarket auxiliary tanks can be installed, but they require professional installation, fuel-system modification, and compliance with local regulations. Weigh the benefits against added weight, complexity, and potential resale impact.
Summary
Two-gas-tank trucks exist primarily in older generations and niche applications, rather than as a staple of today’s mainstream pickups. If extended range is essential, verify whether a vehicle has an auxiliary tank via documentation or inspection, and consider modern alternatives or aftermarket options with professional guidance. For most buyers, a single, well‑sized fuel tank backed by efficient performance and, if needed, an efficient auxiliary fuel system, will meet daily needs without the complexity of a second tank.
Why would a truck have two gas tanks?
Some trucks have two gas tanks primarily to increase range and improve weight distribution, making them more practical for long hauls, towing, or working in remote areas. It was also often easier for manufacturers to install two smaller tanks than one very large one.
Primary benefits
- Increased range: Dual tanks allow a truck to carry significantly more fuel, which means fewer stops at the gas station, especially on long trips or while towing.
- Improved weight distribution: By splitting the fuel weight between two tanks, manufacturers can balance the truck's weight, which can improve handling and traction.
- Easier installation: It was often simpler to design and install two smaller tanks than one large, complex tank that would require significant engineering to fit.
- Durability and convenience: With two tanks, a truck has a reserve in case one tank is damaged, particularly from off-road impacts. Some systems allow drivers to switch between tanks, while newer systems can balance the fuel automatically.
Why they are less common now
- Modern trucks are generally more fuel-efficient, reducing the need for such a large fuel capacity.
- The extra weight of a second tank and its associated components (like a second pump, wiring, and fuel lines) can offset fuel economy gains.
- Manufacturers now focus on other features, such as comfort and advanced technology, which are prioritized over dual tanks.
What car has two gas tanks?
One of the distinctive features of an early series Jaguar XJ like this is that they have twin filler caps one on each side and that's because they have twin fuel tanks one here. And one in the same
Does the Chevy 3500 have two gas tanks?
Choose from a front or rear fuel tank on the Chevy Silverado 3500, or you can have a combination of the two with a fuel capacity of 63.5 gallons.
Is GM really making a $8000 pickup truck?
No, GM is not making an $8,000 pickup truck; this is a false rumor likely originating from clickbait videos. GM's smallest truck, the Chevrolet Montana, is sold only in South America, and its price would be significantly higher than $8,000 in the U.S. even if it were imported.
This video discusses the GM $8,000 pickup rumor and its potential impact on the market: 58sGarage HeadsYouTube · Jun 1, 2024
- False rumor: The idea of an $8,000 pickup truck is a marketing tactic that has spread through sensationalist videos and online posts, often misattributing the claim to GM or Ford.
- Chevrolet Montana: GM does sell a small truck called the Chevrolet Montana, but it is designed for the South American market and is not sold in the United States.
- Pricing in the US: Even if the Montana were available in the US, its price would be much higher than $8,000 due to import taxes and other market factors.
- Actual GM trucks: GM's current trucks, such as the Chevrolet Silverado, have starting prices far above this amount, with prices ranging from roughly $30,000 to over $80,000 depending on the model and features.
