2026
GMC SIERRA 2500HD AT4 4X4 CREW CAB 6.75 FT. BOX (NHT)

The 2026 GMC Sierra 2500 HD AT4 Crew Cab 4WD is a premier heavy-duty mechanical masterpiece that masterfully fuses elite cabin luxury with extreme off-road architectural engineering. Strikingly styled in a classic Summit White exterior paint and paired with an exclusive Jet Black interior featuring Kalahari accents, this truck delivers an assertive road presence. Under the hood lies the legendary Duramax 6.6L V8 Turbo-Diesel engine paired with a heavy-duty 10-speed automatic transmission, creating monumental towing power through a robust 3.42 rear axle ratio. Max Trailering Package: Heavily reinforces the truck's operational boundaries by upgrading it with a specialized 3500 HD frame, structural heavy-duty leaf springs, a massive 12-inch rear axle, and an upgraded shock package to maximize raw towing capabilities safely. AT4 Premium Plus Package: Packs the premium cabin with top-tier convenience and driver tech, adding a power sunroof, Rear Camera Mirror, multicolor 15-inch diagonal Head-Up Display (HUD), power sliding rear window, Universal Home Remote, LED roof marker lamps, and sleek power-retractable assist steps with integrated LED lighting. Premium All-Terrain Ground Protection: Factory-equipped to dominate deep mud and rugged construction sites with high-performance LT275/65R-20 BFGoodrich Off-Road T/A KO3 tires. Black Badging Package: Sharpens the truck's custom premium look with sleek dealer-installed black GMC emblems and dark-themed exterior badging that creates a bold contrast against the bright white paint. Pro-Grade Trailering & Protection: Standard-equipped with a factory-reinforced Gooseneck/5th Wheel Prep Package to hook up high-capacity industrial trailers right off the lot, paired with dealer-installed custom-moulded splash guards to protect the body panels. All-Weather Interior Armor: Fully prepared for rough outdoor adventures and harsh elements with premium factory floor liners featuring removable carpet inserts to shield the luxury cabin floor. Enhanced Safety & Security: Features an integrated tailgate assist handle for effortless bed access and dealer-installed wheel locks to keep the high-end 20-inch alloy wheels completely secure.