How big is the gas tank on a Chevy 3500?
The typical gas tank capacity for a Chevrolet Silverado 3500HD gasoline model is about 36 gallons (roughly 136 liters). Exact capacity varies by model year and cab/bed configuration, and diesel variants can differ by a few gallons.
The Chevy 3500 line refers to the Silverado 3500HD heavy‑duty pickup. Buyers can choose between gasoline and diesel powertrains, and the fuel tank size is affected by body style (Regular, Double Cab, Crew Cab) and bed length (short, standard, or long bed). In most recent years, GM has commonly equipped Silverado 3500HD with a 36‑gallon tank for gasoline variants, though there are exceptions depending on configuration.
Key figures you may encounter based on common configurations:
- 36 gallons (about 136 liters) for most gasoline‑engine Silverado 3500HD configurations
- 31 gallons (about 117 liters) for certain older or specialty configurations
These figures provide a general guide across model years and trims. For your exact truck, verify the specification from official sources.
How to verify the exact tank size for your Silverado 3500HD
Because tank size can vary by year, engine, cab, and bed, consult the official specifications for your specific vehicle. The steps below will help you confirm the exact capacity.
- Check the window sticker (Monroney label) on the driver's door jamb for the "Fuel Tank Capacity" entry
- Look in the owner's manual under Specifications or Fuel System section
- Use GM's online VIN lookup or the Chevy Owner Center to pull the exact vehicle specifications
- Ask a Chevrolet dealer with the VIN; they can retrieve the exact tank capacity from GM's database
By confirming the capacity tied to your VIN, you avoid confusion from other GM trucks or regional variations.
Notes on year-to-year variation
GM has offered different tank sizes or optional fuel setups across generations. The most common gasoline‑equipped Silverado 3500HD configurations in recent years center around a 36‑gallon tank, but older models or special editions may use a different capacity. Always verify with the vehicle’s documentation.
Summary: For most Silverado 3500HD gasoline variants, plan on a 36‑gallon fuel tank (about 136 liters). Exact size depends on year, cab/bed configuration, and whether the truck is gas or diesel. To be certain, check the window sticker, owner's manual, VIN-based spec lookup, or ask a dealer.
How big is the fuel tank on a 2025 Chevy 3500 dually?
36.0gal
Specifications. Fuel tank capacity - 36.0gal.
How many gallons of gas does a Chevy 3500 hold?
With sturdy 18-inch steel DRW wheels and two fuel tank options, including an available tank capacity of approximately 63 gallons, Silverado 3500 HD Chassis Cab will help make the toughest jobs feel easier.
How big is a Chevy 3500 gas tank?
0/0 mi. 36.0 gal.
Do trucks have 30 gallon tanks?
The average fuel tank size for trucks ranges from 20 to 40 gallons.
