Clean CARFAX. CARFAX One-Owner. FREE DELIVERY ANYWHERE IN COLORADO, 2025 GMC Sierra 2500HD Denali Ultimate, Four-Wheel Drive, Duramax 6.6L Turbo-Diesel V8 Engine, Allison 10-Speed Automatic Transmission, Onyx Black Exterior, Alpine Umber Interior, 20″ Polished Aluminum Wheels, Power Assist Steps, Power Folding, Heated and Auto-Dimming Trailer Mirrors, LED Fog Lamps, LED Cargo Area Lighting, Spray-On Bedliner, Chrome Front Recovery Hooks, GMC MultiPro Tailgate, Power Sliding Rear Window, Roof Marker Lamps, Power Sunroof., Premium Denali Ultimate Leather Interior, 16-Way Power Front Bucket Seats, Heated and Ventilated Front Seats, Heated Rear Outboard Seats, 60/40 Split Folding Rear Bench Seat with Storage Package, Leather-Wrapped Steering Wheel, Driver Seat and Mirror Memory, 13.4″ Diagonal Color Touchscreen, Premium GMC Infotainment System, Google Built-In Compatibility, Wireless Apple CarPlay and Android Auto, Bose Premium Series 12-Speaker Audio System, Head-Up Display, Wireless Phone Charging, Remote Start, Keyless Open and Start., Automatic Locking Rear Differential, Two-Speed Autotrac Transfer Case, Stabilitrak with Trailer Sway Control, Trailer Brake Controller, Integrated Trailer Hitch, Vehicle Trailering App, Trailer Side Blind Zone Alert, Bed View Camera, HD Surround Vision., Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, Rear Cross Traffic Alert, Front and Rear Park Assist, Buckle to Drive, HD Surround Vision.. Onyx Black 2025 GMC Sierra 2500HD Denali Ultimate 4D Crew Cab Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD