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Gas vs Diesel Comparison Guide
The 2026 Chevy Silverado 2500HD gas engine yields up to 3,689 pounds of payload capacity. The heavier Duramax diesel drops payload slightly but unlocks up to 22,500 pounds of towing. Explore our available heavy-duty truck inventory at Greg Hubler Chevrolet to compare these massive powertrains in person today.
Choosing the right 3/4-ton truck comes down to how you plan to use the cargo bed versus the hitch. While both powertrains share the same high-strength frame and standard Allison 10-speed transmission, their weight distribution creates unique structural advantages.
To see how these engine options fit into the broader heavy-duty lineup, view our complete 2026 Chevy Silverado 2500HD vehicle overview. This guide contrasts the specific hauling and trailering limits to help you choose the correct workhorse for your Indiana job site.
The standard gas engine is lighter than its diesel counterpart. This physical weight difference directly translates into a higher maximum payload capacity.
| Specification | 6.6L V8 Gas Engine | 6.6L Duramax Turbo-Diesel V8 |
|---|---|---|
| Max Horsepower | 401 hp | 470 hp |
| Max Torque | 464 lb-ft | 975 lb-ft |
| Max Payload Capacity | Up to 3,689 lbs | Up to 3,615 lbs |
| Max Towing Capacity | Up to 19,080 lbs (when properly equipped) | Up to 22,500 lbs (when properly equipped) |
Because the gas block weighs less, the heavy-duty suspension can dedicate more of its structural capacity to the cargo you put in the bed. A maximum payload limit of 3,689 pounds makes the gas model ideal for carrying heavy physical materials directly. This translates to safely loading the Durabed full of wet concrete, gravel, or thick lumber for residential construction projects around Indianapolis without exceeding the gross vehicle weight rating. You can read more about commercial payload compliance directly on the NHTSA commercial vehicle safety database.
If your daily routine involves pulling massive trailers rather than filling the cargo box, the Duramax diesel is the undisputed champion.
While the heavy iron block of the diesel engine reduces the total payload by about 75 pounds, it compensates by generating an earth-moving 975 lb-ft of torque. This torque allows the 2500HD to pull up to 22,500 pounds when properly equipped with a gooseneck hitch. In practical terms, this means you can effortlessly pull a massive fifth-wheel camper down to Brown County State Park, or haul commercial excavators out of Camby without struggling to reach highway speeds.
Both engines utilize the identical Allison 10-speed automatic transmission, ensuring that whether you choose gas or diesel, you have the precise, seamless gearing needed for steep inclines. For further reading on heavy-duty trailering systems, visit the official Chevrolet truck capability portal.
Whether you need the payload advantage of the 6.6L Gas V8 or the massive torque of the Duramax diesel, Greg Hubler Chevrolet has the heavy-duty truck for you. Browse our current inventory or schedule a test drive today.
