How big is the fuel tank on a 2018 Chevy Silverado 2500HD engine 6.6 L V8 diesel?
The fuel tank capacity is 36 gallons (about 136 liters). This specification applies to the 2018 Silverado 2500HD equipped with the 6.6-liter Duramax diesel in most configurations. It represents the standard tank size Chevrolet cited for that model year.
Understanding this capacity helps with planning long drives, towing heavy loads, and estimating fueling stops. For buyers and fleet operators, the 36-gallon tank is a core factor in determining range and logistics on the road.
Tank size and what it means for driving
Chevrolet’s official specifications for the 2018 Silverado 2500HD with the Duramax 6.6L V8 diesel list a 36-gallon fuel tank. This is the typical capacity across most body styles and trims offered that year, providing a substantial range between fill-ups when navigating long hauls or remote routes.
Notes for buyers and owners
While 36 gallons is the standard figure, verify the exact tank size for a specific vehicle using the owner’s manual, the vehicle’s build sheet (VIN-specific), or Chevrolet’s official product pages, since regional builds or dealer options can occasionally vary slightly.
Why tank size matters for towing and range
A larger tank in a heavy-duty diesel like the 6.6L Duramax helps reduce stopovers for fuel during long trips or when towing heavy trailers. The 36-gallon capacity strikes a balance between payload, space, and practical range, aligning with the Silverado 2500HD’s role as a workhorse capable of extended operation between fuel stops.
Engineered for reliability and endurance, the Duramax-powered Silverado 2500HD relies on this standard tank size to support its heavy-duty performance while offering reasonable range for work sites, farms, fleets, and long-distance travel alike.
Summary
In short: the 2018 Chevrolet Silverado 2500HD with the 6.6-liter Duramax diesel is equipped with a 36-gallon fuel tank, equivalents to roughly 136 liters. This is the standard configuration for most model variants in that year, and it serves as a baseline for planning range and fueling logistics. Always confirm the exact tank size for your specific vehicle via the owner’s manual or build sheet.
How big is the fuel tank on a 2018 Chevy 2500HD?
36.0gal
2018 Chevrolet Silverado 2500HD LTZ
Fuel tank capacity: 36.0gal.
How big is the gas tank on a 2500HD diesel?
36.0 gal
Fuel & MPG
0/0 mi. 36.0 gal.
What year of Chevy 2500HD to avoid?
The Chevrolet Silverado 2500 HD has earned its place as a reliable, hardworking truck for decades, but not every model year has hit the mark. The 2003-2006, 2014, 2015, 2017, and 2020 models stand out as years to avoid due to widespread mechanical issues, safety recalls, and owner complaints.
How many gallons of diesel does a 6.6 Duramax hold?
The fuel tank capacity of a 6.6 Duramax truck, such as a 2500HD or 3500HD, typically ranges from 24 to 36 gallons, depending on the cab and bed configuration. Crew cab models generally have a 36-gallon tank. Extended cab and regular cab models may have slightly smaller tanks, typically around 24 to 26 gallons.
