2026 GMC Sierra 3500HD Denali Ultimate

If you want a dually that can handle serious work without giving up first-class luxury, this hard-to-find 2026 GMC Sierra 3500HD Denali Ultimate Crew Cab 4x4 belongs at the top of your list. The all-new Glacier White Tricoat exterior looks incredible with the gloss black accents, bold Denali Ultimate front end, polished forged-aluminum wheels, and wide dual-rear-wheel stance. Inside, the exclusive Alpine Umber leather interior gives this heavy-duty GMC a premium look you will not find in an ordinary work truck. This Sierra is built around its dual rear wheels and 14,000-pound GVWR package, giving it the strong, stable foundation needed for serious towing and hauling. With the factory gooseneck and fifth-wheel preparation package, integrated trailer brake controller, Hitch Guidance, Hitch View, Trailer Sway Control, and in-vehicle Trailering App, this dually looks ready to pull the state of Texas. A 3.42 rear axle, automatic locking rear differential, digital variable steering, and two-speed electronic AutoTrac transfer case add even more capability. Under the hood is the proven 6.6-liter Duramax turbo-diesel V8 paired with the smooth Allison 10-speed automatic transmission. This highly sought-after powertrain is ready for demanding jobs, long highway trips, heavy trailers, and everyday driving. A high-idle switch, Hill Start Assist, four-wheel drive, and StabiliTrak help make this Sierra 3500HD as useful on a job site as it is comfortable on the open road. The Denali Ultimate cabin is loaded with 16-way power front seats, heated and ventilated front seats, heated second-row outboard seats, driver-seat and mirror memory, a heated leather-wrapped steering wheel, adaptive cruise control, dual-zone climate control, wireless charging, and a power sliding rear window. Power-retractable assist steps with LED perimeter lighting make entry easier while keeping the exterior clean when they fold away. Technology includes a 13.4-inch GMC Premium Infotainment touchscreen with Google built-in, navigation capability, wireless Apple CarPlay, wireless Android Auto, and Bluetooth. A 12.3-inch reconfigurable driver display, 15-inch multicolor Head-Up Display, Rear Camera Mirror, Bed View Camera, HD Surround Vision, and Bose 12-speaker premium audio surround you with the technology expected from the Ultimate Edition. You also get 120-volt power outlets in the cab and bed, SiriusXM capability, and OnStar services. Sierra HD Pro Safety includes Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, IntelliBeam automatic high beams, Safety Alert Seat, Front and Rear Park Assist, Rear Cross Traffic Alert, and Trailer Side Blind Zone Alert. Additional equipment includes animated LED projector headlights, LED fog lights, power-folding and extending heated tow mirrors, rain-sensing wipers, LED bed lighting, a spray-on bedliner, and the versatile GMC MultiPro tailgate. Come see this hard-to-find 2026 GMC Sierra 3500HD Denali Ultimate Duramax dually today at Unique Trucks in Scottsdale, Arizona, and take it for a test drive. We specialize in lifted trucks, diesel trucks, and premium heavy-duty 4x4s, and we are a one-of-a-kind Scottsdale dealership where the price you see is the price you pay—everything is included with no additional markups. If you cannot make it in, call and let us work out the best deal over the phone. We can deliver this dually directly to your doorstep with no obligation, giving you the chance to see it, touch it, and experience it from the comfort of your home.