If you need a heavy-duty truck, you can’t go wrong with the 2025 GMC Sierra HD. Whether you choose the 2500 HD or the 3500 HD lineup, here are some standout features you’ll love.
Powerful Gas Engine
Both Sierra HD models come standard with a 6.6L V8 gas engine that produces 401 horsepower and 464 lb-ft of torque. That’s plenty of power for effortless hauling, with maximum payload capacities ranging from 4,005 pounds in the 2500 HD lineup to 4,721 pounds in the 3500 HD lineup, depending on the trim. This engine pairs with a 10-speed automatic transmission for smooth shifting and exceptional traction on and off the road.
Available Turbo Engine
If you need more power or maximum towing capacity, you can upgrade to the 6.6L Duramax turbo-diesel V8 engine that outputs 470 horsepower and 975 lb-ft of torque. This engine, offered standard on the Denali Ultimate, delivers enhanced traction and quicker acceleration, and it also provides a towing capacity of up to 36,000 lbs, depending on the lineup and trim level.
Trailering Provisions
Regardless of the powertrain you choose, each Sierra HD trim comes well-equipped for heavy-duty towing. The standard Trailering Package includes a 2.5-inch receiver hitch with a 2-inch insert and 4-pin as well as 7-pin connectors, a wiring harness so you can easily connect the trailer’s light and brakes, a trailer hitch, a trailer hitch platform, and hitch guidance.
For even easier towing, all but the base trim can be enhanced or come standard with GMC’s in-vehicle trailering app, which includes a convenient checklist so you can make sure everything is in perfect working order before departure. The app also provides trailer security alerts, electrical diagnostics, and trailer maintenance reminders so you’ll never get behind the maintenance schedule.
Modern Technologies
The new Sierra HD is not only powerful. It is also fun to drive and comes well-equipped to keep you entertained and connected to your life. GMC’s newest infotainment system boasts Google built-in, meaning you can easily personalize your user experience and enjoy all your favorite Google apps. Advanced driver assistance technologies are also standard and include an HD Rear Vision camera for easier backing in narrow parking lots.
Ready to try all these features on the road? Visit us at Conley Buick GMC in Bradenton, FL to browse our inventory and take the new Sierra HD for a test drive.
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