2025 Chevrolet Suburban: Diesel vs. Gas Engine – Which Is Better?

The 2025 Chevy Suburban, a full-size SUV, offers gas V8s or an upgraded 3.0L Duramax diesel—so which engine is right for you? Here we explore the benefits of both.

Both engine types deliver unique strengths, making the Suburban a versatile option for families, adventurers, and those with serious towing needs. 

Here’s how the diesel and gas models compare, along with their standout features.

2025 Chevrolet Suburban Diesel vs. Gas: Head-to-Head

Diesel: 3.0L Duramax Turbo-Diesel I6

The new second-generation 3.0L Duramax turbo-diesel (LZ0) brings notable improvements in both power and efficiency. 

Now delivering 305 horsepower and a class-leading 495 lb-ft of torque, this engine is engineered for those who prioritize long-range capability, fuel savings, and effortless towing. 

It pairs with a 10-speed automatic transmission for smooth, responsive shifts.

Best Features of the Diesel Chevy Suburban:

• Outstanding Fuel Economy: Achieves up to 21 mpg city and 27 mpg highway with a best-in-class 728 miles EPA-estimated max highway range per tank, making it the most efficient Suburban engine.
• High Torque Output: 495 lb-ft at low RPM ensures strong acceleration and confident towing, even with heavy loads.
• Smooth, Quiet Operation: Inline-six design and modern engineering deliver a refined, quiet ride.
• Long-Distance Range: With a 28-gallon fuel tank, the diesel Suburban can travel up to 728 miles on a single tank, ideal for road trips and commercial use.
• Durability: Steel pistons and improved internals enhance reliability, especially under heavy-duty use.
• Towing Capability: Can tow up to 7,800 pounds (4WD), making it a great choice for boats, trailers, or campers.
• Lower Emissions: Modern diesel tech means cleaner operation than older diesels.

Gas: 5.3L and 6.2L EcoTec3 V8s

The Suburban’s gas lineup includes a 5.3L V8 (355 hp, 383 lb-ft) and a 6.2L V8 (420 hp, 460 lb-ft), both with Dynamic Fuel Management for improved efficiency. 

These engines are ideal for drivers who want strong performance, quick acceleration, and the highest towing ratings.

Best Features of the Gas Chevrolet Suburban:

• Strong Acceleration: The 6.2L V8 launches the Suburban from 0-60 mph in just 6.1 seconds, while the 5.3L offers smooth, responsive power for daily driving.
• Maximum Towing: With the Max Trailering package, the 5.3L V8 can tow up to 8,300 pounds, the highest in the lineup.
• Proven Reliability: Both V8s have a long track record for durability and low maintenance costs.
• Broad Trim Availability: The 5.3L V8 is standard on most trims, while the 6.2L is exclusive to the High Country, offering flexibility in features and pricing.
• Classic V8 Sound: For enthusiasts, the gas V8s provide the traditional rumble and driving feel.

Which Suburban Should You Choose?

• Choose Diesel if: You want maximum fuel efficiency, long-range capability, and high torque for towing at lower RPMs.
• Choose Gas if: You prioritize acceleration, the highest possible towing capacity, or prefer the sound and feel of a V8.

Shop For Your New Diesel or Gas Powered Chevy Suburban at Our Chevy Dealership

No matter your choice, the 2025 Suburban delivers advanced technology, a refined interior, and the rugged capability that has made it a staple in Kansas City driveways for generations. 

Test drive your new gas or diesel powered 2025 Chevy Suburban today at Cable Dahmer Chevrolet of Kansas City near Overland Park and Olathe!