How big is the gas tank on a Chevy 3500 diesel?
The diesel-equipped Chevy Silverado 3500HD typically uses a 36-gallon fuel tank. Exact capacity can vary by model year and cab/bed configuration, so verify your specific truck's spec if you need precise numbers.
Current guidance on fuel-tank capacity
For the latest Silverado 3500HD models with the Duramax 6.6L diesel, Chevrolet lists a 36-gallon fuel tank as the standard capacity. This size is common across most crew cab and regular cab configurations and bed lengths, reflecting the truck's heavy-duty mission. However, variations can exist due to year changes, trim levels, or optional equipment, so it’s wise to confirm the specific value for your vehicle.
Configuration and year considerations
Current generation (2020–present)
In the current generation, the Duramax-powered Silverado 3500HD commonly uses a 36-gallon tank. The capacity is designed to balance range with payload and towing demands across typical cab/bed combinations.
Older models and exceptions
Earlier generations and some special-order configurations may have different tank sizes. If your truck isn’t from the latest generation, the exact capacity could differ, so check the door jamb sticker or the original window sticker for your exact figure.
How to confirm the exact size on your truck
To nail down the precise tank size for your VIN, use these reliable sources:
- VIN-based spec sheet or window sticker from the dealership.
- Owner's manual, under the Specifications or Fuel system section.
- Chevrolet's official site or dealer service with your VIN for a precise spec pull.
Knowing the exact capacity helps with trip planning, fuel budgeting, and estimating range for towing or work assignments.
Practical implications for range and usage
A 36-gallon fuel tank translates into a substantial roaming range, especially on diesel economics and highway cruising. Depending on load, terrain, and driving style, you can expect hundreds of miles between fills—the practical figure varies with payload and towing duty.
Summary
In the current Silverado 3500HD lineup, the Duramax diesel commonly uses a 36-gallon fuel tank. Exact capacity should be verified on your vehicle’s door sticker or official documentation, since year, cab configuration, and options can affect the figure. This tank size supports long-range work drives and heavy towing typical of the 3/4-ton class.
