Experience the uncompromising power and capability of the 2026 GMC Sierra 2500HD AT4. This exceptional heavy-duty truck is engineered to conquer any terrain, delivering a driving experience that is both thrilling and refined.
Featuring a Duramax 6.6L V8 Turbodiesel engine, the Sierra 2500HD AT4 boasts an impressive 470 horsepower and an astounding 975 lb-ft of torque. Paired with a 10-speed automatic transmission and a robust 4-wheel-drive system, this truck is ready to tackle any job or adventure with ease.
6.6L V8 Diesel Turbocharged (Duramax) (B20-Diesel Compatible) (Includes (K05) Engine Block Heater) (470 hp [350.5 kW] @ 2800 rpm, 975 lb-ft of torque [1322 Nm] @ 1600 rpm)
AT4 Preferred Package
Gooseneck/5th Wheel Prep Package
Technology Package
X31 Off-Road Package
The Sierra 2500HD AT4 is more than just a powerful workhorse; it's a true off-road champion. Equipped with the X31 Off-Road Package, this truck features an advanced suspension system, skid plates, and hill descent control, making it the ultimate companion for exploring the great outdoors.
Inside, the Sierra 2500HD AT4 offers a premium, well-appointed cabin that caters to your every need. The Bose Premium 7-Speaker Sound System and the intuitive Premium GMC Infotainment System provide an exceptional multimedia experience, while the heated and ventilated front seats and heated rear seats ensure maximum comfort, no matter the weather.
Safety and convenience are also at the forefront of the Sierra 2500HD AT4's design. Features like Automatic Emergency Braking, Forward Collision Alert, and Rear Cross Traffic Alert work tirelessly to keep you and your passengers safe, while the Wireless Charging and Wireless Phone Projection capabilities keep you connected and powered up on the go.
Whether you're tackling tough jobs, exploring the great outdoors, or simply seeking a premium, capable, and versatile heavy-duty truck, the 2026 GMC Sierra 2500HD AT4 is the perfect choice. Experience the unparalleled power and refinement that only a GMC can deliver.
Prices may change at any time and are subject to availability and prior sale. Taxes, title, license fees, and a $180 documentation fee are not included. Pricing reflects all applicable rebates and incentives assigned to the dealer. Example payments are estimates; actual terms vary based on credit approval. APR and payment estimates apply to qualified buyers, not all buyers qualify for advertised rates. Factory cash incentives may not be combined with promotional APR. Fuel economy ratings and driving range figures are based on EPA estimates for new vehicles, and actual mileage and range may vary. Some in-stock vehicles may include a $1,295 Clear Guard Protection package By submitting your phone number online, you consent to occasional SMS or voice calls about our products and promotions; standard messaging rates may apply. Consult dealer for offer eligibility and other details. Factory MSRP is not the final advertised/asking price of the vehicle. Fuel economy figures are EPA estimates. Price includes: $500 - Purchase Allowance




