The 2026 GMC Sierra 2500HD Denali Ultimate 4WD Crew Cab combines commanding capability with refined luxury. Featuring a striking Onyx Black exterior paired with an Alpine Umber interior, this Denali Ultimate model elevates both style and comfort. Powered by a Duramax 6.6L V-8 direct injection, intercooled turbo diesel engine delivering 470 horsepower, it offers impressive performance for demanding tasks. Equipped with advanced driver assistance technologies, this Sierra includes Forward Collision Alert, Front Pedestrian Braking, and Automatic Emergency Braking to enhance safety on the road. A Multicolor 15' diagonal Head-Up Display keeps critical information within easy view, promoting safer driving. Additional features like Lane Departure Warning, IntelliBeam Automatic High Beams, and an auto-dimming rear camera mirror further support driver awareness. Inside, full-grain leather seat trim adds a touch of premium comfort, complementing the spacious crew cab layout. For towing ease, Hitch Guidance with Hitch View and the In-Vehicle Trailering System app provide precise assistance during hitching and hauling. This Sierra 2500HD Denali Ultimate seamlessly blends robust diesel power, advanced safety systems, and luxury appointments to meet the needs of drivers seeking both capability and sophistication.