2026 GMC Sierra 2500HD AT4 Crew Cab 4WD

This 2026 GMC Sierra 2500HD AT4 4WD in Summit White is powered by a Duramax 6.6L V8 turbodiesel paired with a 10-speed automatic, making it a strong choice for towing and off-road use. Inside this Crew Cab, Jet Black leather-appointed seats with Kalahari accents feature 10-way power adjustments, heating, and ventilation for both front seats, plus heated second-row outboard seats. The cabin includes a Bose 7-speaker audio system, 15-inch multicolor head-up display, wireless charging, and a premium GMC infotainment system with Apple CarPlay and Android Auto. Additional comforts include dual-zone climate control, a heated steering wheel, driver memory, and a power sunroof. Safety features cover HD Surround Vision, lane departure warning, rear cross traffic alert, trailer side blind zone alert, ultrasonic park assist, a safety alert seat, and an inside rearview auto-dimming camera mirror. Trailering is made easier with Hitch Guidance with Hitch View, trailer camera provisions, the in-vehicle trailering app, and the Gooseneck/5th Wheel Prep Package. The X31 Off-Road Package and off-road suspension boost capability on rough terrain. The exterior stands out with 20-inch high gloss black 8-spoke aluminum wheels, smoked amber roof marker lamps, deep-tinted glass, LED cargo area lighting, a spray-on bedliner with GMC logo, and the Black Badging Package. A power sliding rear window and bed view camera add practicality and style.