Summit White exterior and Jet Black interior, Denali trim. KEY FEATURES INCLUDELeather Seats, 4x4, Heated Driver Seat, Cooled Driver Seat, Back-Up Camera, Running Boards, Premium Sound System, Onboard Communications System. Keyless Entry, Privacy Glass, Steering Wheel Controls, Alarm. GMC Denali with Summit White exterior and Jet Black interior features a 8 Cylinder Engine with 397 HP at 3000 RPM*. OPTION PACKAGESENGINE, DURAMAX 6.6L TURBO DIESEL V8, B20-DIESEL COMPATIBLE (397 hp 296.0 kW @ 3000 rpm, 765 lb-ft of torque 1032.8 N-m @ 1600 rpm) Includes (K40) exhaust brake. ENTERTAINMENT PACKAGE, REAR SEAT DVD/BLU-RAY PLAYER with 9.2 inch LCD display, 2 sets of wireless headphones and A/V remote control, TRANSMISSION, ALLISON 1000 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, electronic engine grade braking and tow/haul mode, SUNROOF, POWER, DRIVER ALERT PACKAGE includes Lane Departure Warning, Forward Collision Alert, and Safety Alert Seat, MIRRORS, OUTSIDE HEATED POWER-ADJUSTABLE VERTICAL CAMPER, UPPER GLASS, POWER-FOLDING AND MANUAL EXTENDING, CHROME. Includes integrated turn signal indicators consisting of 51 square inch flat mirror surface positioned over a 24.5 square inch convex mirror surface with a common head and lower convex spotter glass (convex glass is not heated and not power-adjustable) and addition of Auxiliary cargo lamp for backing up (helps to see trailer when backing up with a trailer) and amber auxiliary clearance lamp, AUDIO SYSTEM, 8 DIAGONAL COLOR TOUCH SCREEN NAVIGATION WITH INTELLILINK, AM/FM/SIRIUSXM WITH USB PORTS auxiliary jack, SD card slot, Bluetooth® streaming audio for music and most phones, hands-free smartphone integration, Pandora Internet radio and voice-activated technology for radio and phone (STD). EXPERTS ARE SAYINGThe 2015 GMC Sierra 2500HD manages to provide a comfortable ride along with its strong work capacity, thanks to its stiff frame and a suspension that can not only handle higher loads but also smooth out rough roads. -Edmunds.com. AFFORDABLEThis Sierra 2500HD is priced $5,300 below J.D. Power Retail. Pricing analysis performed on 10/5/2026. Horsepower calculations based on trim engine configuration. Please confirm the accuracy of the included equipment by calling us prior to purchase.