GMC’s Sierra HD series of heavy-duty pickups has earned widespread recognition for extreme reliability and performance. The truck’s seemingly endless list of configurations and options enables it to excel in a wide variety of situations. Here’s your introduction to the 2025 GMC Sierra HD!
Get to Know the 2025 GMC Sierra HD
Compelling Powertrain Options
Whether you choose the 2500 HD or 3500 HD, the truck is standardly equipped with a naturally aspirated 6.6L V8 engine putting out a hefty 401 horsepower and 464 lb-ft of torque. Transferring that output to the drive wheels is an Allison 10-speed automatic transmission featuring a tow/haul mode and auto grade braking, which automatically applies engine braking to slow and stop the vehicle on inclines.
Buyers may opt for a turbodiesel version of the V8 that increases performance to an incredible 470 horsepower and 975 lb-ft of torque. It also comes with integrated engine after-run cooling for ensuring that the motor continues to run at its best even after prolonged use.
Capable Towing and Hauling
The Sierra HD’s heavily reinforced frame allows it to tow up to 20,000 pounds when using a ball hitch, plus the 3500 HD has a maximum gooseneck towing capacity of 36,000 pounds. Maximum payload capacities are similarly impressive, ranging from around 3,000 pounds to nearly 5,000 pounds (depending on the selected configuration). With a box length of up to 98.27 inches, the Sierra HD has no problem accommodating extra-long pieces of cargo.
Off-Road-Focused Trims
A well-articulated, sturdy suspension and available 4-wheel drive make any Sierra HD variant a worthy off-roader, but the lineup’s AT4 and AT4X models are meant to take on the most challenging conditions. The AT4 gets rugged enhancements like a beefed-up suspension featuring twin-tube Rancho shock absorbers and durable skid plates.
A lifted suspension with Multimatic DSSV dampers and massive 35-inch Goodyear Territory MT tires makes the AT4X the ultimate adventure truck. Both the AT4 and AT4X include recovery hooks and the HD Surround Vision camera system that provides multiple views around the vehicle for greater awareness as you maneuver through tricky spots.
Functional and Comfortable Interior
The Sierra HD can be had as a regular cab, double cab, or crew cab. While the regular cab seats three people, the double cab and crew cab easily serve as family haulers with room for six. Available creature comforts, such as dual-zone automatic climate control, leather upholstery, and 10-way power front seats, make for an especially cozy ride. Sporting genuine wood trim and perforated leather seats, Denali models represent the pinnacle of GMC luxury.
An infotainment system supporting wireless smartphone integration and a mobile Wi-Fi hotspot is standard. The Denali Ultimate trim’s 12-speaker Bose premium sound system is complemented by a Richbass subwoofer and CenterPoint surround technology.
You’ll be hard-pressed to find another heavy-duty truck that comes close to being as well-equipped as the Sierra HD! Visit Price GMC in Karnes City, TX today and discover it for yourself.
