What is the gas mileage on a 2015 Chevy Silverado 2500HD engine 6.0 L V8?
Across most 2015 Silverado 2500HD configurations powered by the 6.0-liter V8, fuel economy sits in the low-teens in city driving and the high-teens to low-twenties on the highway. Two-wheel-drive models typically post better numbers than four-wheel-drive versions. Real-world mileage varies considerably with payload, towing, terrain and driving style.
Engine at a glance
The 2015 Silverado 2500HD offered a 6.0-liter Vortec V8 as the gas-powered option, delivering about 360 horsepower and roughly 380 lb-ft of torque. It paired with a heavy-duty 6-speed automatic transmission and offered multiple axle ratios (including 3.73 and 4.10 options) that influenced efficiency. Because this is a work truck built for hauling and towing, its mpg figures are notably lower than light-duty pickups, and they change with cab style, bed length and drivetrain.
EPA fuel economy by configuration
EPA estimates for the 6.0 L V8 in the 2015 Silverado 2500HD vary by cab/bed setup, drivetrain (4x2 vs. 4x4) and axle ratio. The ranges below cover common configurations and are intended as a general guide rather than a precise sticker value.
- 4x2 Regular Cab, long bed: approximately 11–13 mpg city and 17–19 mpg highway (combined around 14–16 mpg).
- 4x2 Crew Cab, short bed: approximately 11–12 mpg city and 17–19 mpg highway (combined around 14–15 mpg).
- 4x4 Crew Cab, short bed: approximately 10–12 mpg city and 16–18 mpg highway (combined around 13–15 mpg).
- 4x4 Regular Cab, long bed: approximately 10–12 mpg city and 16–18 mpg highway (combined around 13–15 mpg).
Notes: Individual results can vary by model year, towing weight, payload, tire choice, and how the vehicle is driven. The EPA ratings are built around standardized testing and may not reflect real-world conditions, especially when towing or carrying heavy loads.
Real-world mileage and factors that affect it
Actual mileage is often lower than EPA estimates for work trucks that frequently haul or tow, or operate under load in hilly terrain. Several factors can push mpg down or up in daily use:
- Payload and towing weight
- Terrain and driving speed, including frequent stops and starts
- Drivetrain choice (4x4 vs. 4x2) and axle ratio
- Air resistance from a full bed or aftermarket equipment
- Tire type and inflation pressure
With careful driving, regular maintenance, and proper loading, real-world mileage tends to cluster around the mid-teens for many configurations, though owners frequently report lower figures when towing or carrying heavy loads.
Tips to improve mileage on the 6.0 L V8 HD
- Keep tires inflated to the recommended pressure to reduce rolling resistance.
- Limit aerodynamic drag by removing unnecessary roof racks or bed equipment when not in use.
- Plan trips to minimize idling and maximize highway cruising where possible.
- Follow a smooth acceleration and steady-speed driving style; use cruise control on highways.
- Perform regular maintenance (air filter, spark plugs, fuel system) as recommended by GM.
These practices can help maximize efficiency, though the nature of a heavy-duty pickup means mpg will still fall well short of light-duty rivals in many scenarios.
Summary
The 2015 Chevy Silverado 2500HD with the 6.0 L V8 delivers solid power for towing and payload, but its fuel economy reflects its heavy-duty purpose. Expect EPA ranges that vary by configuration, with 4x4 models typically recording lower numbers than 4x2 variants. Real-world mileage will depend on how the truck is used, and many owners see mileage in the mid-teens under typical mixed-use conditions. For precise numbers, consult the specific vehicle’s window sticker or the EPA’s official ratings for that exact configuration.
