Every new vehicle from Preston GM Superstore includes the Preston Advantage which includes a free lifetime engine warranty, free PA state inspections for life, 2 free oil changes, and more!2500HD, Denali, Crew Cab, Duramax 6.6L V8 Turbo Diesel, 4x4, Keyless Entry, Push Button Start, Remote Start, Automatic Emergency Braking, IntelliBeam-Auto High Beam, Trailer Side Blind Zone Alert, Front and Rear Park Assist, Auto Locking Rear Differential, Auto Locking Rear Differential, Trailering Package, Trailer Brake Controller, 13.4 Color Touchscreen with Wireless CarPlay, Wireless Charging, Bose Premium Sound, Bed View Camera, 12.3 Color Driver Information Center, 12 Way Power Front Bucket Seats, Heated and Ventilated Front Seats, Heated Rear Seats, Driver Seat Memory, Heated Steering Wheel, Leather, Chrome Assist Steps, Led Fog Lamps, Power Fold/Extend and Heated Trailering Mirrors, Chrome Front Recovery Hooks, Spray-On Bedliner, Led Cargo Area Lighting, Power Sliding Rear Window, GMC MultiPro Tailgate, Roof Marker Lamps, Rear Camera Mirror, Power Sunroof, Technology Package, Rear Camera, Multi-Color Head Up Display, Adaptive Cruise Control, GMC Protection Package, Denali Reserve Package, and HD Surround Vision Camera.