How many miles per gallon does a 2023 Chevy Silverado 2500 diesel get?
The 2023 Chevy Silverado 2500 diesel model is rated to achieve up to 27 miles per gallon (mpg) on the highway and 21 mpg in the city, according to the Environmental Protection Agency (EPA) estimates. This makes the Silverado 2500 diesel one of the more fuel-efficient heavy-duty pickup trucks on the market.
Detailed Fuel Economy Breakdown
The 2023 Chevy Silverado 2500 diesel is powered by a 6.6-liter Duramax turbo-diesel V8 engine that produces 445 horsepower and 910 lb-ft of torque. This engine is paired with a 10-speed automatic transmission.
- EPA-estimated highway fuel economy: 27 mpg
- EPA-estimated city fuel economy: 21 mpg
- EPA-estimated combined fuel economy: 23 mpg
These fuel economy figures are for the rear-wheel-drive (2WD) version of the Silverado 2500 diesel. The four-wheel-drive (4WD) model is rated at 26 mpg highway, 20 mpg city, and 22 mpg combined.
Factors Affecting Fuel Economy
Several factors can impact the real-world fuel economy of the Silverado 2500 diesel, including driving conditions, driving style, payload, and towing capacity. Aggressive acceleration, frequent towing, and driving in hilly or mountainous terrain can all reduce the truck's fuel efficiency.
- Driving conditions (e.g., terrain, weather)
- Driving style (e.g., aggressive acceleration, frequent stops)
- Payload and towing capacity
Overall, the 2023 Chevy Silverado 2500 diesel offers impressive fuel economy for a heavy-duty pickup, making it a practical choice for those who need the power and capability of a 2500-series truck while also prioritizing fuel efficiency.
How many miles per gallon does a 2023 6.6 Duramax get?
The 2023 6.6L Duramax engine typically gets 17–20 mpg on the highway when unloaded, with combined or mixed driving averaging around 15–18 mpg. These figures can vary significantly based on driving conditions, with towing and city driving resulting in lower mileage, sometimes in the 8–13 mpg range.
Estimated 2023 6.6L Duramax MPG
- Unloaded highway: 17–20 mpg
- Mixed/combined city and highway: 15–18 mpg
- With towing: Often 12 mpg or lower, depending on the trailer's weight and size
- City driving: Can drop to the 11–14 mpg range
Factors affecting MPG
- Towing: Towing a trailer will significantly decrease fuel economy.
- Driving habits: Aggressive acceleration and high speeds can lower your MPG.
- Conditions: Factors like wind, terrain, and traffic will impact your actual mileage.
- Break-in period: It is common for mileage to improve after the engine is broken in.
How many miles per gallon does a 2023 Silverado 2500 diesel get?
The 2023 Silverado 2500 diesel (6.6L Duramax) gets around 18 mpg combined in real-world driving, with highway mileage typically ranging from 20-21 mpg and city mileage around 15-18 mpg. While some experts provide an estimated highway rating of up to 19 mpg, real-world results often vary depending on driving conditions, such as towing and city vs. highway driving.
This video discusses the fuel economy of the 3.0L Duramax diesel engine, which is an option for the 1500 model: 44sGetty's GarageYouTube · May 4, 2025
Fuel efficiency by driving type
- Combined: Approximately 18 mpg
- Highway: Around 20-21 mpg
- City: Roughly 15-18 mpg
Important considerations
- EPA ratings: The EPA does not officially test heavy-duty trucks like the 2500, so official ratings are not available. The figures above are based on expert tests and real-world owner experiences.
- Towing: Towing a load can significantly reduce fuel economy, with some owners reporting around 18-19 mpg when towing a 10,500-12,000 lb load, while others report lower figures when towing heavier loads.
- Driving habits: Driving style, speed, and local conditions will all affect your actual mileage.
How many miles per gallon does a 6.7 F 250 diesel get?
A Ford F-250 with the 6.7L diesel engine typically gets 18-20 mpg on the highway and 15-18 mpg in mixed city/highway driving when unloaded. Fuel economy drops significantly when towing, with estimates ranging from 8.9 to 12-15 mpg depending on the load. Real-world mileage is affected by driving style, speed, terrain, and other factors.
Unloaded driving
- Highway: Expect around 18-20 mpg on the highway under optimal conditions. Some drivers report getting as high as 24 mpg on highways, particularly with the high-output (HO) engine and gentle driving.
- Mixed/City: You can expect a combined average of 15-18 mpg.
- Factors: Driving speed has a significant impact. Driving at 80 mph can reduce fuel economy compared to driving at 60-65 mph, where you might see higher mileage.
This video shows a real-world fuel economy test of a Ford F-250 diesel truck: 40sSkinner’s DOSEYouTube · Nov 11, 2025
Towing
- Towing MPG: When towing, fuel economy can drop to 12-15 mpg.
- Heavier loads: With very heavy loads (e.g., a 17,000 lb 5th wheel), mileage can drop to under 9 mpg.
This video demonstrates a fuel economy test of a Ford F-250 diesel while towing a trailer: 59sTFLnowYouTube · Apr 9, 2025
Other considerations
- High-output (HO) engine: The high-output version of the 6.7L engine offers more power with little to no difference in fuel consumption compared to the standard engine under normal conditions.
- Engine break-in: New engines may have lower fuel economy until they are broken in.
- DPF delete: Aftermarket modifications like a DPF delete may increase MPG, but this is not recommended for street use.
How do you get 30 MPG on a Duramax?
General Tips for Better MPG
- Don't let your truck idle for long periods of time if you can help it. Idling burns a lot of fuel and your gas mileage will take a hit.
- Don't be heavy on the gas.
- Watch your tire pressure.
- Service and maintain your Duramax truck regularly.
