Audio System, 8” Diagonal Color Touch Screen Navigation With Gmc Infotainment System, Am/Fm/Siriusxm, Hd Radio, Battery, Heavy-Duty Dual 730 Cold-Cranking Amps/70 Amp-Hr, Capped Fuel Fill, Cover, 1-Piece, Denali Preferred Equipment Group, Duramax Plus Package, Emissions, Federal Requirements, Engine Block Heater, Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel Compatible, Exhaust Brake, Gooseneck / 5Th Wheel Prep Package — Hitch Platform To Accept Gooseneck Or Fifth Wheel Hitch., Gvwr, 11,600 Lbs. (5262 Kg) With Single Rear Wheels, Jet Black, Perforated Leather-Appointed Front Seat Trim, Lamps, Smoked Amber Roof Marker, Lpo, All-Weather Floor Liner, Lpo, Chrome Recovery Hooks, Lpo, Wheel Locks, Set Of 4, Option/Package Discount, Paint, Solid, Rear Axle, 3.73 Ratio, Seats, Front Full-Feature Leather-Appointed Bucket With (Ka1) Heated Seat Cushions And Seat Backs., Summit White, Sunroof, Power, Suspension Package, Standard, Tires, Lt265/70R18e All-Season, Blackwall, Transmission, Allison 1000 6-Speed Automatic, Electronically Controlled, Wheels, 18” (45.7 Cm) Chromed Aluminum.