2025 GMC Sierra 2500 HD AT4X

Fairfield's Autos, located in beautiful Keene, NH, and serving the New Hampshire, Vermont, Massachusetts, and New England region. Our experienced sales staff is eager to share its knowledge and enthusiasm with you. They'll work with you to find the right vehicle at a price you can afford. Come on in and take a test drive! Please call (603) 352-7700.

This 2025 GMC Sierra 2500HD AT4X arrives in Gray, ready to deliver the capability and refinement you expect from a premium heavy-duty truck. Built with purpose, this truck combines advanced technology with rugged performance features designed for those who demand both utility and comfort.

- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 2-Speed Active Transfer Case
- Gooseneck/5th Wheel Prep Package for serious hauling capability
- Snow Plow Prep/Camper Package with reinforced electrical systems
- Upfitter Switch Kit (5) for custom electrical accessories
- 4WD capability with Off-Road Suspension and Hill Descent Control
- Dual 220-Amp Primary and 170-Amp Auxiliary Alternators
- Engine Block Heater for reliable cold-weather starting
- Full Grain Leather Seat Trim with 16-Way Power Driver Adjustment
- Bose Premium 12-Speaker Audio System with Apple CarPlay and Android Auto
- Multicolor 15" Diagonal Head-Up Display
- Advanced safety suite including Automatic Emergency Braking, Lane Departure Warning, and Rear Cross Traffic Alert
- Spray-On Pickup Bedliner with GMC Logo and LED Cargo Area Lighting

The Sierra 2500HD AT4X puts premium features within reach. Heated and ventilated front seats wrapped in full grain leather adjust independently with lumbar support, while heated rear outboard seats extend comfort across the cab. The 15-inch head-up display keeps critical information visible without distraction, and the Bose sound system transforms your daily drive with exceptional audio clarity. Modern connectivity includes wireless phone projection, dual USB ports with charge and data capability, and OnStar services.

Capability is engineered throughout this truck. The Gooseneck/5th Wheel Prep Package includes a hitch platform with tray, stamped bed holes with removable caps, and a bed-mounted 7-pin trailer harness everything ready for serious work. The Snow Plow Prep/Camper Package adds skid plates for the transfer case and oil pan, pass-through dash grommet provisions, and roof emergency light provisions. The Upfitter Switch Kit provides configurable circuits to support aftermarket electrical accessories. The Duramax diesel engine delivers the torque needed for demanding tasks while the dual alternator system ensures adequate power for any workload.

Safety and visibility set this truck apart. Ultrasonic front and rear park assist removes guesswork during tight maneuvers. Rear Surround Vision, trailer camera provisions, and the in-vehicle trailering system app give you complete awareness. Lane Departure Warning, Automatic Emergency Braking, and Front Pedestrian Braking add layers of protection. Rain-sensing wipers, auto high-beam headlights, and LED cargo area lighting enhance visibility in varying conditions.

Drive with confidence knowing you're in a truck built to handle real work and challenging weather. The 2025 Sierra 2500HD AT4X combines diesel power, heavy-duty construction, and modern conveniences a truck ready to work as hard as you do. Contact us today to schedule your test drive and experience firsthand why this truck belongs in your future.