2026 GMC Sierra 2500HD AT4

This is the kind of heavy-duty build that makes people stop, stare and ask who owns it. This lifted 2026 GMC Sierra 2500HD AT4 Crew Cab 4x4 brings together Duramax power, AT4 off-road capability and a clean custom stance. Its color-matched Sterling Metallic exterior looks sharp against the gloss-black accents, aggressive AT4 front end and signature red recovery hooks, while the Jet Black leather interior with Kalahari accents gives it the unmistakable AT4 look inside. The professionally installed 3-inch Rough Country upper-control-arm kit with M1 monotube shocks gives this Sierra a strong stance while maintaining a controlled ride. It sits on 18x9 Hostile Battle H137 wheels in an Asphalt finish, wrapped in massive 37x12.50R18LT Nitto Recon Grappler all-terrain tires. The combination is clean, aggressive and properly matched, giving this lifted GMC the perfect look for the street, jobsite or trail. Power comes from the highly sought-after 6.6-liter Duramax turbo-diesel V8, paired with a smooth 10-speed automatic transmission. The AT4 is ready for demanding work with four-wheel drive, a two-speed Autotrac transfer case, automatic-locking rear differential, off-road and Tow/Haul modes, skid plates and a heavy-duty air cleaner. The trailering package, integrated trailer brake controller, Vehicle Trailering App, trailer sway control and Hill Start Assist add confidence when it is time to tow. Inside, this loaded AT4 offers 10-way power front bucket seats with heating and ventilation, heated rear outboard seats, driver-seat and mirror memory, dual-zone climate control and a heated wrapped steering wheel. The rear 60/40 folding bench includes a storage package, while premium floor liners help protect the cabin. Power-folding, extending and heated trailering mirrors, a 120-volt outlet in both the cab and cargo bed, remote keyless open and start, and a rear-seat reminder add everyday convenience. Technology includes the Premium GMC Infotainment System with a 13.4-inch color touchscreen, Google built-in compatibility, available navigation, Bluetooth and wireless Apple CarPlay and Android Auto. A 12.3-inch digital driver display and Bose premium sound system complete the cabin. Safety features include Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, IntelliBeam, HD Surround Vision, Front and Rear Park Assist, Rear Cross Traffic Alert, Trailer Side Blind Zone Alert and the Safety Alert Seat. The exterior is ready to work with a GMC MultiPro Tailgate, spray-on bedliner, LED cargo lighting, CornerStep rear bumper, animated LED projector headlights, LED fog lights and rear wheelhouse liners. Unique Trucks is located in Scottsdale, Arizona, specializing in lifted trucks and hard-to-find diesel builds. The price you see is the price you pay—everything is included, with no additional markups. Come take this lifted AT4 for a test drive, or call us to make your best deal over the phone and ask about our no-obligation delivery service. We can bring this Sierra directly to your doorstep so you can see it, touch it and experience it from the comfort of your own home.