Research the GMC Sierra HD

The GMC Sierra HD (Heavy Duty) is a powerful and premium full-size pickup truck built for serious towing, hauling, and professional-grade work. Available in 2500HD and 3500HD configurations, the Sierra HD combines rugged performance with advanced technology and upscale comfort, positioning it as a strong contender in the heavy-duty truck segment.

The Sierra HD is offered with two main engine options: a standard 6.6-liter V8 gasoline engine and an available 6.6-liter Duramax turbo-diesel V8. The diesel engine, paired with a 10-speed Allison automatic transmission, delivers exceptional torque and towing capability—up to 36,000 pounds when properly equipped with the 3500HD and dual rear wheels. This makes it a top choice for those towing large trailers, RVs, or heavy equipment.

The truck’s design is bold and commanding, with a massive grille, C-shaped LED lighting, and distinct trim options such as the rugged AT4 and luxurious Denali Ultimate, which features premium leather, open-pore wood, and a 16-way power-adjustable massage seat.

Inside, the Sierra HD offers a spacious, high-tech cabin with an available 13.4-inch touchscreen, 12.3-inch digital driver display, Google built-in services, wireless Apple CarPlay and Android Auto, and up to 14 available camera views for confident towing and trailering.

Safety features are also robust, including forward collision alert, lane departure warning, rear cross traffic braking, and available Super Cruise—GMC’s hands-free driving technology, now usable while trailering on certain models.

Whether on the job site, towing across long distances, or driving in comfort on daily routes, the GMC Sierra HD offers the strength, style, and smart features today’s truck owners demand. It’s a heavy-duty truck that doesn’t compromise on capability, refinement, or innovation.

Your Complete Guide to the GMC Sierra HD: Reviews, Comparisons, Features & More