2025 GMC Sierra 2500HD Denali White 4WD Duramax 6.6L V8 Turbodiesel Recent Arrival! CARFAX One Owner. 6.6L V8 turbo diesel engine with 10-speed automatic transmission and four-wheel drive. Power sunroof and running boards. Adaptive cruise control and lane departure warning. Heated and cooled front seats, plus heated rear seats. Premium sound system and Wi Fi hotspot. Trailering package with tow hitch. Gooseneck / 5th wheel prep package for gooseneck or 5th wheel hitch setup. ProGrade Trailering System with hitch guidance, hitch view, and in-vehicle trailering app. X31 Off-Road Package. Backup camera and aerial view camera system. Rear parking sensors and cross-traffic alert. Front collision warning and front collision mitigation. Power driver and passenger seats with adjustable lumbar support. Driver memory seat and mirror memory. Multi-zone climate control and remote engine start. Heated power-folding mirrors with integrated turn signals. Bed liner, tow hooks, and integrated tailgate step. Rain-sensing wipers, automatic high beams, and fog lamps. Exhaust brake, engine block heater, high idle switch, and 220-amp alternator.