Is the 2025 Chevy 2500 gas or diesel?

The 2025 Chevrolet Silverado 2500HD is offered with both a gasoline V8 and a Duramax turbo-diesel V8, so you can choose the configuration that fits your needs.

In practice, the truck's engine choice affects towing capability, payload, and operating costs. Buyers can opt for the gas-powered 6.6-liter V8 for everyday use, or the Duramax 6.6-liter turbo-diesel for heavier towing and long-haul work. The exact availability can vary by trim and region.

Engine options

Chevrolet provides two main powertrains for the 2025 Silverado 2500HD:

• Gasoline option: 6.6-liter V8 gasoline engine


• Diesel option: 6.6-liter Duramax turbo-diesel V8

Both engines are paired with a heavy-duty transmission and offer different towing and payload characteristics; the diesel variant typically delivers higher torque for heavy towing, while the gasoline option can be more cost-effective for lighter workloads.

Performance considerations

For buyers, the choice boils down to how much you tow and where you drive. Diesel engines excel at long hauls and high-tow scenarios because of torque, while gasoline engines are commonly sufficient for daily driving and moderate towing. Real-world efficiency depends on payload and terrain.

Summary

The 2025 Chevy Silverado 2500HD provides flexibility with two engine options—gasoline and diesel—so customers can tailor power, efficiency, and capability to their needs. Check with a dealer for exact availability on specific trims and configurations.

How many miles per gallon does a 2025 Chevy 2500 diesel get?

The 2025 Chevy 2500 diesel's MPG is estimated to be around 13-14 mpg in the city and 17-18 mpg on the highway, with a combined average of approximately 15 mpg. However, actual mileage will vary based on driving conditions, with a reported highway range of up to 21 mpg on good days, while towing a heavy load can reduce it to 9-10 mpg or lower. 
Estimated fuel economy

• City: 13-14 mpg
• Highway: 17-18 mpg
• Combined: Approximately 15 mpg 

Factors that impact MPG

• Towing: Towing a light load can result in 6-10 mpg, while very heavy loads can drop it to 9 mpg or less. 
• Driving conditions: Heavy city traffic, short trips, and idling will decrease fuel efficiency. 
• Engine break-in: The engine's efficiency will improve as it breaks in over time. 
• Tire size: Larger or more aggressive tires can reduce mileage, as seen in one user's experience with 20-inch wheels. 

Other considerations

• The EPA does not provide official fuel economy ratings for heavy-duty trucks like the 2500HD, so the numbers above are estimates based on real-world testing and driver experiences. 
• Diesel engines are generally more fuel-efficient and offer more torque than their gasoline counterparts, especially when under a heavy load. 

Is the 2025 Silverado 2500 gas or diesel?

The 2025 Chevy 2500 gas is less expensive upfront and has a higher horsepower rating, making it suitable for lighter duties and daily driving. The 2025 diesel is a better choice for heavy towing and hauling due to its superior torque and fuel efficiency, especially under load. The diesel has a higher initial cost, but its better fuel economy can lead to long-term savings for high-mileage drivers.
 
This video compares the fuel economy of the 2025 Chevy Silverado HD with Duramax diesel and gas engines: 34sAutoMotive InquiriesYouTube · Oct 12, 2025
Gas engine

• Pros:
  • Lower upfront cost: The initial purchase price is typically lower. 
  • Higher horsepower: Offers more horsepower than the diesel option, making it a capable choice for many tasks. 
  • Quieter operation: Can be quieter and potentially more comfortable for daily driving. 
• Cons:
  • Lower torque: Has less torque than the diesel, which translates to reduced towing and hauling capability. 
  • Worse fuel economy under load: Fuel efficiency drops significantly when towing heavy loads. 

Diesel engine

• Pros:
  • Superior torque: Delivers significantly more torque for heavy-duty towing and hauling. 
  • Better fuel efficiency under load: Maintains better fuel efficiency than the gas engine when towing. 
  • Better fuel economy on long trips: Offers better mileage, especially on the highway and when towing. 
  • Higher resale value: Diesel trucks often hold their value better. 
• Cons:
  • Higher upfront cost: The initial purchase price is higher. 
  • More complex maintenance: May have higher maintenance costs, although they have fewer spark plugs. 
  • Requires DEF: Needs Diesel Exhaust Fluid (DEF), which is an additional cost and maintenance item. 
  • Heavier: Adds extra weight to the truck. 

Which engine is right for you?

• Choose the gas engine if: You don't frequently tow heavy loads, primarily use the truck for lighter tasks or daily driving, and want to keep your initial purchase price lower. 
• Choose the diesel engine if: You regularly tow or haul heavy loads, drive long distances, or prioritize maximum towing and hauling performance. The extra upfront cost may be offset by long-term fuel savings. 

What is the difference between 2025 6.6 gas and 6.6 diesel?

While the 6.6-liter V-8 gas engine outputs 401 horsepower and 464 pound-feet of torque, the diesel option brings huge muscle with 470 horsepower and 975 pound-feet of torque, upgrading your worksite with adrenaline-pumping potency. But the 6.6 gas engine specs are just as impressive in their own way.

Does the Chevy 2500 take gas or diesel?

With gas or diesel powertrain options and a choice of rear-wheel drive or four-wheel drive, there is a 2025 Chevrolet Silverado 2500 engine for every job.