Meet the 2025 GMC Sierra HD: Built for Big Jobs

Big jobs call for big trucks, and the V8-powered 2025 GMC Sierra HD is as big and powerful as a pickup truck gets. This heavy-duty workhorse is available in both gas and diesel configurations at your local GMC dealership.

Meet the 2025 GMC Sierra HD: Built for Big Jobs

Capable Standard Powertrain

Pop open the base GMC Sierra HD’s hood, and you will find a 6.6L gas V8 that pumps out 401 horsepower and 464 lb-ft of torque. It pairs with the iconic 10-speed Allison automatic transmission, which makes handling heavy loads effortless with smooth gear changes, a special Tow/Haul mode with reduced shift cycling, and Auto Grade Braking. A work-ready RWD system is standard, but drivers who frequently operate in less-than-ideal conditions can opt for the available traction-rich 4WD configuration.

Beefy Diesel V8 Option

Drivers seeking optimum heavy-duty performance should opt for the available 6.6L Duramax Turbo-Diesel V8. This immensely capable machine kicks out 470 horsepower and 975 lb-ft of torque, and, just like the gas V8, it is linked to a 10-speed Allison automatic transmission. When equipped with the diesel V8, the Sierra 2500 HD supports a towing capacity of 21,870 lbs, and the Sierra 3500 HD supports a mind-boggling 36,000 lbs.

Advanced Trailering Technology

The GMC Sierra HD features a sophisticated suite of trailering technologies that gets you through a workday comfortably. For instance, available adaptive cruise control factors in the hitched trailer’s drag coefficient when determining throttle and braking distance, and available trailer side blind zone alert notifies drivers when a vehicle approaches either side of the trailer. An in-vehicle trailering app (standard on all models above the SLE trim level) provides pre-departure checklists, trailer mileage readouts, and tow/haul reminders.

The pickup truck also features several standard and available cameras that help drivers monitor their surroundings. The rearview camera comes with an integrated hitch guidance system that helps you line up the pickup truck’s hitch to the trailer. Additionally, an available camera system with up to 14 views streams footage of the truck bed, trailer, and traffic on the infotainment screen.

Excellent Build Quality

Both the GMC Sierra 2500 HD and 3500 HD are built to endure the extreme stress of heavy-duty work. The pickup truck features a fully boxed frame, which is made of high-strength steel, and a hydroformed front section, which provides a better strength-to-weight ratio than traditional stamped steel structures. Additionally, the pickup truck’s bed is made from roll-formed high-strength steel, allowing you to haul heavy payloads for years to come.

The GMC Sierra HD packs the muscle and technology to turn your workday into a breeze. Talk to our finance team to get pre-approved for an auto loan and make this heavy-duty pickup truck yours today at Dorsey-Jones GMC in El Reno, OK.

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