The 2025 GMC Sierra HD is one of the most popular trucks for heavy-duty towing and hauling. You can choose between two lineups, both packed with tough features that redefine what heavy trucking should be.
7 Tough Features of the 2025 GMC Sierra HD
Powerful Standard Powertrain
Whether you opt for the Sierra 2500 HD or the 3500 HD, this rugged truck’s beating heart is a 6.6L V8 gas engine. It makes 401 horsepower and 464 lb-ft of torque, delivering impressive torque distribution and exceptional traction with the help of the 10-speed Allison transmission. Rear-wheel drive is standard on both lineups, while four-wheel drive is available on all trim levels.
Exceptional Payload Capacity
The Sierra HD’s base powertrain delivers massive payload capacities, meaning it is a great choice for heavy-duty hauling. In the 2500 HD lineup, it provides up to 3,907 pounds, which is more than enough for transporting construction materials and other bulky loads. The 3500 HD offers a payload of up to 4,721 lbs, making this lineup more suitable for hauling heavy-duty camping or farming gear.
Available Turbo-Diesel Engine
Featuring an efficient turbocharger, the available 3.0L Duramax V8 turbo-diesel engine is a great upgrade if you need more control when hauling or off the road. Like the gas engine, it pairs with an Allison 10-speed automatic transmission and delivers 470 horsepower and 975 lb-ft of torque. It features a standard exhaust brake, providing more control when hauling heavy loads, especially downhill.
Massive Towing Capacity
The Sierra HD’s maximum towing capacity comes from the turbo-diesel engine that provides up to 21,870 lbs in the 2500 HD models and 36,000 lbs in the 3500 HD.
Standard Trailering Provisions
Designed with advanced trailering in mind, the 2025 Sierra HD comes standard with a range of trailering provisions, including hitch guidance, wiring harnesses, trailering mirrors, and a trailer brake controller. GMC’s in-vehicle trailering apps are optional or standard on most trim levels.
Best-in-Class Cargo Volume
Capacity isn’t the only thing that matters in a truck designed for hauling, you also need room for cargo. The Sierra HD excels in this aspect, with its standard bed offering 69.5 cubic feet. In models equipped with a long bed, the box offers a cargo volume of 83.5 cubic feet.
Available Off-Road Upgrades
If you’re into off-roading or have to haul heavy materials and gear up a rugged trail, you can customize this truck with skid plates, heavy-duty suspensions, and Rancho performance shocks for improved handling and shock absorption. All-terrain tires are also available, providing excellent traction on all road surfaces.
Off-Road Capabilities with AT4X Trim
For off-the-grid jobs or play:
- Multimatic DSSV™ dampers
- Front and rear e-locking differentials
- Steel skid plates
- Available AT4X AEV Edition for even more rugged durability
Rugged and capable on and off the road, the 2025 Sierra HD is a truck you must experience for yourself. Schedule your test drive today at Yates Buick GMC in Goodyear, AZ.
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