. and . . Sierra 3500HD SLT, 4D Crew Cab, Duramax 6.6L V8 Turbodiesel, Allison 1000 6-Speed Automatic, 4WD, Onyx Black, Jet Black w/Leather-Appointed Seat Trim, 4.2" Diagonal Color Display Driver Info Center, 6" Rectangular Black Tubular Assist Steps (LPO), 6-Speaker Audio System, ABS brakes, Air Conditioning, Auto-Dimming Inside Rear-View Mirror, Automatic temperature control, Bed Liner, Bumpers: chrome, Chrome Door Handles, Chrome Power-Adjustable Heated Outside Mirrors, Compass, Deep-Tinted Glass, Driver door bin, Driver vanity mirror, Dual-Zone Automatic Climate Control, Electric Rear-Window Defogger, Front Center Armrest w/Storage, Front dual zone A/C, Front Halogen Fog Lamps, Fully automatic headlights, Heated & Cooled Driver & Front Passenger Seats, Heated door mirrors, Heated Driver & Front Passenger Seats, Illuminated entry, Memory seat, Outside temperature display, Power door mirrors, Power driver seat, Power steering, Power Sunroof, Power Windows, Radio: AM/FM Stereo w/8" Diagonal Color Touch Screen, Rear Vision Camera w/Dynamic Guide Lines, Rear window defroster, Remote Keyless Entry, SiriusXM Satellite Radio, Steering Wheel Audio Controls, Steering wheel mounted audio controls, and Trip computer. Imagine yourself behind the wheel of this robust 2015 GMC Sierra 3500HD. This rig is on a mission.