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 3500HD Denali Ultimate is a true powerhouse, designed to tackle any job with unparalleled capability and refined luxury. Boasting a Duramax 6.6L V8 Turbodiesel engine paired with a 10-speed automatic transmission, this truck delivers exceptional towing and hauling performance, with the added confidence of 4-wheel drive.
- UPFITTER SWITCH KIT, (5)
- PREMIUM FLOOR LINERS WITH REMOVABLE CARPET INSERT, FRONT
- LPO, BODY COLOR WHEEL ARCH MOLDINGS
- HIGH IDLE SWITCH
- SNOW PLOW PREP/CAMPER PACKAGE
- GOOSENECK / 5TH WHEEL PREP PACKAGE
The Denali Ultimate trim elevates this Sierra to new heights, with a wealth of premium features that cater to your every need. Indulge in the Bose Premium Series 12-Speaker System, enjoy the convenience of wireless charging and phone projection, and stay connected with the SiriusXM with 360L Trial Subscription.
The Sierra 3500HD Denali Ultimate is built to impress, both inside and out. Its bold, Vader Chrome-accented grille and sleek, aerodynamic design command attention on the road, while the spray-on bedliner and ProGrade Trailering System ensure your cargo is secured with confidence.
Step inside and experience the ultimate in luxury and comfort. The heated and ventilated front seats, along with the heated rear outboard seats, provide year-round comfort, while the power-adjustable driver and front passenger seats ensure a perfect fit. The Multicolor 15 Diagonal Head-Up Display and the 13.4 Diagonal Information Display keep you informed and in control, while the Wireless Charging and USB ports keep your devices powered up.
Safety is a top priority in the Sierra 3500HD Denali Ultimate, with features like Automatic Emergency Braking, Forward Collision Alert, and Rear Cross Traffic Alert providing added peace of mind. The Ultrasonic Front and Rear Park Assist and the Bed View Camera with Trailer Camera Provisions further enhance your driving experience, making it easier to navigate tight spaces and tow with confidence.
At Fairfield's Auto Group, we believe that buying a vehicle should be as transparent as it is rewarding. By offering the area's lowest doc fees at just $399 and providing up to two years of complimentary service* on all retail units, we ensure your investment is protected from day one. From our complimentary EV charging stations to a free state inspection at the time of purchase for our Vermont and New Hampshire neighbors, every detail is designed with your convenience in mind. Visit us today to experience our best price guarantee and see firsthand why Fairfield's is the Monadnock Region's premier choice for a better car-buying journey.




