The 2025 GMC Sierra 3500 HD is known for its powerful performance and sharp, athletic build. Able to tow massive loads with confidence, this heavy-duty truck is ideal for hauling lumber or trailers. For more details on the 2025 GMC Sierra 3500 specifications and features, continue reading this review created by the team at Al Piemonte Buick GMC. You can also explore our trims guide for a thorough list of features included with each Sierra 3500 HD model.
If you think the new GMC Sierra 3500 HD would fit your workday needs, look through our new inventory and consider one of our active new vehicle specials. Then, use our online form to schedule a test drive at our GMC dealership in Elmhurst, IL. Have questions for our team? Give us a call at (630) 832-9500 or message us online and we’ll be happy to help.
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*Starting MSRP
There are three 2025 GMC Sierra 3500 HD cab options available, each outfitted with premium amenities and plenty of room for you. You can opt for the three-passenger regular cab or six-passenger double or crew cabs. All cab options can be paired with a long bed, which holds up to 83.5 cubic feet of cargo. Or, if you choose the crew cab, it offers a standard bed option with a cargo capacity of up to 69.5 cubic feet.
The interior of the 2025 GMC Sierra 3500 HD is designed to optimize comfort. Three seating upholstery options are available — cloth, perforated leather, or full-grain leather. Commit to all-season comfort with the available heated front and rear outboard seats and ventilated front seats. Optimize stargazing and cloud-watching potential through the available power sunroof.
Available interior features include:
The 2025 GMC Sierra 3500 HD offers hefty performance capabilities with either of the two available engine options. The standard 6.6L V8 gas engine produces up to 401 horsepower, while the available 6.6L Duramax® turbo-diesel V8 engine produces up to 975 pound-feet of torque. To optimize performance further, you’ll find standard features like an Autotrac® two-speed transfer case with push button controls and an external engine oil cooler, as well as available features like an off-road suspension, twin-tube Rancho shocks, and skid plates.
Engine specs are shown in the accompanying table.
| Engine | 6.6L V8 gas | 6.6L Duramax turbo-diesel V8 |
|---|---|---|
| Horsepower | 401 HP | 470 HP |
| Torque | 464 lb.-ft. | 975 lb.-ft. |
| Drivetrain | 2WD / 4WD | |
| Transmission | Allison® ten-speed automatic | |
You’ll be able to maximize your towing potential with the 2025 GMC Sierra 3500 HD. You can tow up to 20,000 pounds conventionally with a 6.6L Duramax V8 engine and a crew cab. Achieve the maximum capable payload — 7,237 pounds — with the 6.6L V8 gas engine and the regular cab with two-wheel drive (2WD) and dual rear wheel (DRW). If you’re planning to tow with fifth-wheel/gooseneck towing, turn to the regular cab and Duramax V8 engine with DRW and two-wheel drive (2WD) to achieve a 36,000-pound towing capacity. Available towing features include adaptive cruise control with trailering, ProGrade trailering tech, and up to 14 available camera views.
Max available towing specs include:
| Max. Conventional Towing | 20,000 lbs. |
|---|---|
| Max. Gooseneck/Fifth-wheel Towing | 36,000 lbs. |
| Max. Payload Capacity | 7,237 lbs. |
High-tech innovations keep you and your crew engaged and protected in the 2025 GMC Sierra 3500 HD. Set into the dashboard is an available 13.4-inch GMC Premium Infotainnment system, which gives you access to features like built-in Google apps and wireless Apple CarPlay® and Android Auto™. Make workdays more fun with the amplification of the available 12-speaker Bose® Premium Series system with CenterPoint®. Protect yourself and your crew with standard Sierra HD Pro Safety features like automatic emergency braking and a lane departure warning system, as well as available features like HD surround vision and hitch view.
Available technology features include:
Available driver assistance features include:
The 2025 GMC Sierra 3500 HD is here to revolutionize your daily drives. Stop by Al Piemonte Buick GMC to experience it for yourself. You can find our latest selection in our new inventory and use our online form to schedule a test drive at our GMC dealership in Elmhurst, IL. If you have any questions, give us a call at (630) 832-9500 or message us online.
