2025 GMC Sierra 2500 HD Engines & Towing Capacity | Gas vs. Diesel Specs
Discover the incredible power of the 2025 GMC Sierra 2500 HD. This robust, heavy-duty pickup truck is expertly crafted to tackle off-road adventures and hauling tasks alike. Choose from a selection of a sturdy 6.6L V8 gas engine and a turbo diesel engine, each perfectly suited for whatever job comes its way. To learn more about the exceptional towing capabilities and performance specifications, our team at McGonigal Buick GMC has put together this helpful 2025 GMC Sierra 2500 HD engine overview guide.
Don’t miss our Sierra 2500 HD trims guide for a detailed breakdown of standard features for each variant.
Take a moment to browse our Sierra 2500 HD inventory. If you find a model that piques your interest, feel free to schedule a test drive at our dealership in Kokomo, IN, and experience it firsthand. Have questions for our team? Please contact us online or give us a call at (765) 319-8473.
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2025 GMC Sierra 2500 HD Gas vs. Diesel Engine Specs
The 2025 GMC Sierra 2500 HD delivers versatile performance for your daily drives, featuring both gas and diesel engine choices to tackle any job. Both engine options come with a smooth Allison® ten-speed automatic transmission that enhances fuel efficiency. You can also choose between rear-wheel drive (RWD) or four-wheel drive (4WD) configurations with either option.
If you want to get the most out of your power, opt for the available 6.6L Duramax® turbo diesel V8 engine, which boasts an impressive 975 pound-feet of torque at 1,600 revolutions per minute (RPM). This puts less stress on the engine while providing more controlled acceleration to make towing heavy loads easier.
The standard 6.6L gas V8 engine offers an impressive 464 pound-feet of torque at 4,000 RPM, so it’s still well-suited for your daily work. This engine is also E85 flex-fuel capable, so you can save at the pump while still tapping into the power you need.
See the accompanying chart for engine specifications.
| Engine | 6.6L gas V8 | Duramax 6.6L turbo diesel V8 |
|---|---|---|
| Horsepower | 401 HP | 470 HP |
| Torque | 464 lb.-ft. | 975 lb.-ft. |
| Drivetrain | RWD / 4WD | RWD / 4WD |
| Transmission | Allison ten-speed automatic | Allison ten-speed automatic |
2025 GMC Sierra 2500 HD Towing & Payload Capacity Chart
The 2025 GMC Sierra 2500 HD stands out as a top option for those needing to tow and transport heavy loads. By pairing the regular cab configuration with the Duramax V8 engine and the Max Trailering Package, the Sierra 2500 HD offers remarkable fifth-wheel and gooseneck towing abilities. For the best conventional towing capacity, opt for the crew cab version featuring the Duramax V8 engine, which can tow as much as 20,000 pounds.
See the accompanying table for towing and payload capacities per cab option.
| 2025 GMC Sierra 2500 HD Cab Size | Max. Payload Capacity for Gas/Diesel Engine | Max. Conventional Trailering Capacity for Gas/Diesel Engine | Max. Fifth-Wheel/Gooseneck Trailering Capacity for Gas/Diesel Engine |
|---|---|---|---|
| Regular | 3,759 / 4,064 lbs. | 14,500 / 14,500 lbs. | 18,700 / 22,390 lbs. |
| Double | 3,788 / 3,519 lbs. | 16,000 / 17,900 lbs. | 18,600 / 18,100 lbs. |
| Crew | 3,565 / 3,859 lbs. | 16,000 / 20,000 lbs. | 18,500 / 21,870 lbs. |
2025 GMC Sierra 2500 HD Towing Technology Available
The 2025 GMC Sierra 2500 HD features a variety of state-of-the-art trailering technologies designed to simplify hitching and maneuvering during your rigorous workday. The Sierra 2500 HD comes standard with a trailering package, which includes wiring harnesses, a 2.5-inch hitch receiver, and hitch guidance visible through the rearview camera. Additionally, certain trims come with the cutting-edge ProGrade® trailering system, which enhances trailering capabilities and provides access to up to 14 different camera views.
Available towing technology includes:
- Up to 14 available camera views
- HD surround vision
- Transparent trailer view
- Hitch view
- Cargo bed view with zoom view and hitch guidelines
- Front camera view
- Rear camera view
- Surround view
- Front top-down view
- Rear top-down view
- Front side view
- Rear side view with trailer biasing
- Rear trailer view with guidelines and trailer angle indicator
- Inside trailer view
- Picture-in-picture view
- ProGrade trailering tech
- Trailer side blind zone alert
- Trailer sway control
- Trailer length indicator
- Trailer brake controller
- Trailer angle indicator with jack-knife alert
- Gross combined weight (GCW) alert
- Trailer light test
- Trailer theft detection
- Maintenance reminders
- Customizable trailer profiles
- Predeparture checklists
- Tow/Haul mode
- Trailering mirrors
2025 GMC Sierra 2500 HD Learn More About the GMC Sierra 2500 HD
The truck pros at McGonigal Buick GMC are committed to helping you find the GMC Sierra 2500 HD that complements your lifestyle. If you've made your decision on the Sierra 2500 HD, take a look at our trims guide for a breakdown of each model's standard features.
When you're set, explore our new inventory to locate your ideal pickup truck, and stop by our GMC dealership in Kokomo, IN, for a test drive. For any inquiries, please contact us online or call us at (765) 319-8473.
Disclaimer:
The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.
1Dealer Discount applied to everyone
1Dealer Discount applied to everyone
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