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How big is the fuel tank on a Chevy 3500 diesel?

The fuel tank capacity of a Chevy 3500 diesel truck is 36 gallons. This large fuel tank allows the powerful diesel engine to travel long distances without the need for frequent refueling.


Detailed Fuel Tank Specifications


The Chevy 3500 is a heavy-duty pickup truck designed for towing, hauling, and other demanding tasks. Its diesel engine provides impressive torque and fuel efficiency, but it also requires a sizable fuel tank to power this capability.



  • Fuel tank capacity: 36 gallons

  • Fuel type: Diesel

  • Fuel tank material: Plastic

  • Fuel tank location: Mounted underneath the truck bed


The large 36-gallon fuel tank gives the Chevy 3500 diesel a substantial driving range, allowing owners to travel long distances without the need for frequent refueling stops. This is especially beneficial for those who use their truck for work, towing, or other applications that require extended periods of driving.


Factors Affecting Fuel Efficiency


While the Chevy 3500 diesel has a large fuel tank, its actual fuel efficiency can vary depending on several factors:



  • Driving conditions: Hauling heavy loads, driving in hilly terrain, or encountering strong headwinds can all reduce fuel efficiency.

  • Driving style: Aggressive acceleration, high-speed driving, and frequent braking can negatively impact fuel economy.

  • Maintenance: Proper maintenance, such as regular oil changes and tire rotations, can help optimize the truck's fuel efficiency.


By understanding these factors and adjusting their driving habits accordingly, Chevy 3500 diesel owners can maximize the benefits of the truck's large fuel tank and enjoy extended driving ranges between refueling stops.

What is the difference between 2500hd and 3500HD?


One of the biggest differences is that with the much wider chassis with the 3500HD with available dual rear wheels this truck is capable of towing much more weight. The dual rear wheels deliver much more power to the pavement. While the 2500 HD is capable of towing up to 18,510 lbs. the 3500HD can tow up to 36,000 lbs.



How many miles per gallon does a Chevy 3500 diesel get?


Based on data from 24 vehicles, 880 fuel-ups and 275,628 miles of driving, the 2024 Chevrolet Silverado 3500 HD gets a combined Avg MPG of 12.12 with a 0.22 MPG margin of error.



How many gallons does a diesel Chevy truck hold?


The only outlier is the 2WD diesel models. Those models have a 22-gallon fuel tank capacity.



How many gallons is a Duramax DEF tank?


Customers or dealers may have comments on adding fluid to the DEF tank. The capacity of the tank is 20 L (5.3 gal) and the trucks are shipped with 7.5 L (2 gal) from assembly. During PDI, it may be possible to add more than the approximate 13 L (3.5 gal) of remaining capacity.



How big is the fuel tank on a 6.6 Duramax?


The specs say 36 gallons, of course. Diesel is prone to foam, especially if you're fast-filling a nearly empty tank, so a slow fill will maximize the amount of fuel you can get in there.



How big is the fuel tank on a 2024 Chevy 3500 diesel?


2024 Chevrolet Silverado 3500 HD Crew Cab Specs, Features & Options

Bed Length
7534 pounds7534 pounds7534 pounds
Fuel Capacity
36 gallons36 gallons36 gallons
Front Head Room



How many gallons does a 6.6 Duramax take?


Duramax Fluid Capacities

YearEngineCapacity
2017-20196.6L Duramax L5P7 gallons
2020-20246.6L Duramax L5P10 quarts
2020-20246.6L Duramax L5P14.37 quarts
2020-20246.6L Duramax L5P20.60 quarts



How many MPG does a 2024 6.6 Duramax get?


Eight months and 16,000 miles of diverse driving have proven that as we've averaged 18.8 mpg in our diesel Silverado ZR2. However, if you pull the 2,600 miles of max-weight towing out of the equation, that figure jumps to an impressive 20.9 mpg.



How many gallons does a Chevy 3500 diesel hold?


Fuel & MPG
0/0 mi. 36.0 gal.



What is high mileage for a 6.6 Duramax?


300,000 miles
When it comes to Duramax 6.6L engines, hitting over 300,000 miles or 480,000 km is often seen as high mileage, but this can vary based on maintenance and overall truck condition. With proper care, these engines can keep going strong for up to 500,000 miles or 800,000 km.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.