2015 GMC Sierra 3500HD Denali Iridium Metallic 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 TurbodieselAllison 1000 6-Speed Automatic, 4WD, Jet Black Leather, 110-Volt AC Power Outlet, 150 Amps Alternator, 18 Chromed Aluminum Wheels, 3.73 Rear Axle Ratio, 4-Wheel Disc Brakes, 4.10 Rear Axle Ratio, 7 Speakers, 8 Enhanced Driver Instrument Information Display, ABS brakes, Adjustable pedals, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM, Auto-Dimming Inside Rear-View Mirror, Auto-dimming Rear-View mirror, Automatic temperature control, Bodyside moldings, Bose Speaker System, Brake assist, Bumpers: body-color, CD player, Chrome Bodyside Moldings, Chrome Door Handles, Chrome Power-Adjustable Heated Outside Mirrors, Chrome wheels, Color-Keyed Carpeted 1st & 2nd Row Floor Mats, Color-Keyed Carpeting Floor Covering, Compass, Deep-Tinted Glass, Delay-off headlights, Driver & Front Passenger Visors, Driver Alert Package, Driver door bin, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Dual-Zone Automatic Climate Control, Duramax Plus Package, Duramax Plus Package (Regional), Electric Rear-Window Defogger, Electronic Shift Transfer Case, Electronic Stability Control, Engine Block Heater, Exhaust Brake, Exterior Parking Camera Rear, EZ-Lift & Lower Tailgate, Floor Mounted Console, Front anti-roll bar, Front Body-Color Bumper, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front Frame-Mounted Black Recovery Hooks, Front Full Feature Bucket Seats, Front Halogen Fog Lamps, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, Garage door transmitter, Heated & Cooled Driver & Front Passenger Seats, Heated door mirrors, Heated Driver & Front Passenger Seats, Heated front seats, Heated steering wheel, Illuminated entry, Leather Wrapped Heated Steering Wheel, Manual Tilt-Wheel/Telescoping Steering Column, Memory seat, Navigation System, Occupant sensing airbag, OnStar 6 Months Directions/Connections, OnStar w/4G LTE, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Pedal memory, Perforated Leather-Appointed Seat Trim, Power Adjustable Pedals, Power door mirrors, Power driver seat, Power passenger seat, Power Sliding Rear Window, Power steering, Power Sunroof, Power Windows, Power windows, Preferred Equipment Group 5SA, Radio: AM/FM Stereo w/8 Diagonal Color Touch Nav., Rear 60/40 Folding Bench Seat (Folds Up), Rear B