2026 GMC Sierra 2500HD AT4

If you’ve been waiting for a lifted diesel with the right stance, premium comfort and serious power, this one-owner 2026 GMC Sierra 2500HD AT4 Crew Cab 4x4 is worth the call! Its hard-to-find Coastal Dune exterior pairs perfectly with the gloss-black AT4 accents, giving this truck a distinctive look from every angle. Inside, the Jet Black cabin with Kalahari accents brings the upscale feel that makes an AT4 just as appealing on a road trip as it is on the job. The custom setup starts with a professionally installed 3-inch Rough Country upper-control-arm kit and M1 monotube shocks. Matte-black 17x8.5 Black Rhino Sentinel wheels are wrapped in aggressive 37x12.50R17 Toyo Open Country R/T Pro tires, giving this lifted GMC a bold stance that demands a closer look. The combination of Coastal Dune paint, black wheels and oversized tires makes this AT4 an absolute head-turner. Under the hood, the 6.6-liter Duramax turbo-diesel V8 delivers the strength buyers want from a heavy-duty truck, paired with a smooth 10-speed automatic transmission. Four-wheel drive, a two-speed Autotrac transfer case and an automatic-locking rear differential help provide traction when conditions change. Off-road and Tow/Haul modes, skid plates and a heavy-duty air cleaner round out a truck equipped for work and weekend adventures. When it’s time to hook up a trailer, this Sierra offers a trailering package, integrated trailer-brake controller, Vehicle Trailering App, Trailer Sway Control and Hill Start Assist. Power-folding, extending and heated trailering mirrors help you keep an eye on your surroundings, while Trailer Side Blind Zone Alert adds useful awareness alongside the truck and trailer. With 120-volt outlets in both the cab and cargo bed, you also have convenient power for compatible tools and electronics. Climb inside and enjoy 10-way power front bucket seats with heating and ventilation, heated rear outboard seats and a heated wrapped steering wheel. Driver-seat and mirror memory make it easy to return to your preferred settings, while dual-zone climate control keeps the cabin comfortable. The rear 60/40 folding bench includes a storage package for everyday gear, and premium floor liners help protect the interior. This is the kind of cabin that makes a long day behind the wheel easier to enjoy. Technology includes GMC’s Premium Infotainment System with a 13.4-inch touchscreen, Google built-in compatibility, navigation capability, Bluetooth and wireless Apple CarPlay and Android Auto. A 12.3-inch digital driver display and Bose premium sound system complete the experience. HD Surround Vision and front and rear parking assistance help with maneuvering, while Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, IntelliBeam, Rear Cross-Traffic Alert and the Safety Alert Seat provide added driver support. Unique Trucks is located in Scottsdale, Arizona, specializing in lifted trucks, diesel trucks and custom 4x4 models that stand out. We are a one-of-a-kind dealership where the price you see is the price you pay—everything is included, including the installed upgrades, with no additional markups. Come check out this one-owner lifted AT4 and take it for a test drive, or call us and we’ll work out our best deal with you over the phone. Ask about our no-obligation delivery service and we can bring it directly to your doorstep so you can see it, touch it and experience it from the comfort of your own home. If you don’t like it, you don’t buy it—it’s that simple.