Certified. 2016 GMC Sierra 3500HD Denali 4D Crew Cab 4WD Allison 1000 6-Speed Automatic Duramax 6.6L V8 Turbodiesel Onyx Black Sierra 3500HD Denali, Oakes Auto CPO Certified, 4D Crew Cab, Duramax 6.6L V8 Turbodiesel, Allison 1000 6-Speed Automatic, 4WD, Jet Black Leather, 110-Volt AC Power Outlet, 150 Amps Alternator, 8" Multi-Color Customizable Driver Display, Auto-Dimming Inside Rear-View Mirror, Chrome Bodyside Moldings, Chrome Door Handles, Chrome Power-Adjustable Heated Outside Mirrors, Color-Keyed Carpeted 1st & 2nd Row Floor Mats, Color-Keyed Carpeting Floor Covering, Deep-Tinted Glass, Driver & Front Passenger Visors, Driver Alert Package, Dual-Zone Automatic Climate Control, Duramax Plus Package, Electric Rear-Window Defogger, Electronic Shift Transfer Case, EZ-Lift & Lower Tailgate, Forward Collision Alert, Front Body-Color Bumper, Front Frame-Mounted Black Recovery Hooks, Front Halogen Fog Lamps, Gooseneck/5th Wheel Prep Package, HD Radio, Heated & Vented Front Seating, Lane Departure Warning System, Leather Wrapped Heated Steering Wheel, Manual Tilt-Wheel/Telescoping Steering Column, OnStar Guidance Plan For 6 Months, OnStar w/4G LTE, Power Adjustable Pedals, Power Sliding Rear Window w/Defogger, Power Windows, Preferred Equipment Group 5SA, Rear 60/40 Folding Bench Seat (Folds Up), Rear Body-Color Bumper w/Bumper CornerSteps, Rear Vision Camera w/Dynamic Guide Lines, Remote Keyless Entry, Remote Locking Tailgate, Remote Vehicle Starter System, Single-Slot CD/MP3 Player, Steering Wheel Audio Controls, Trailering Equipment, Ultrasonic Front & Rear Park Assist, Unauthorized Entry Theft-Deterrent System, Universal Home Remote, 17" Polished Aluminum Wheels, 3.73 Rear Axle Ratio, 4-Wheel Disc Brakes, 4.10 Rear Axle Ratio, 7 Speakers, ABS brakes, Adjustable pedals, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM, Auto-dimming Rear-View mirror, Automatic temperature control, Bodyside moldings, Bose Speaker System, Brake assist, Bumpers: body-color, CD player, Compass, Delay-off headlights, Driver door bin, Driver vanity mirror, Dual 150 Amps & 220 Amps Each Alternator, Dual front impact airbags, Dual front side impact airbags, Electronic Stability Control, Emergency communication system: OnStar Guidance, Engine Block Heater, Exhaust Brake, Exterior Parking Camera Rear, Floor Mounted Console, Front anti-roll bar, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front Full Feature Bucket Seats, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, Garage door transmitter, Heated door mirrors, Heated Driver & Front Passenger Seats, Heated front seats, Heated steering wheel, High Idle Switch, High-Intensity Discharge Headlights, Illuminated entry, Memory seat, Occupant sensing airbag, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Pedal memory, Perforated Leather-Appointed Seat Trim, Power door mirrors, Power driver seat, Power passenger seat, Power steering, Power windows, Premium audio system: IntelliLink, Radio: AM/FM/SiriusXM w/IntelliLink & Navigation, Rear reading lights, Rear seat center armrest, Rear step bumper, Rear window defroster, Remote keyless entry, Security system, SiriusXM Satellite Radio, Smoked Amber Roof Marker Lamps, Speed control, Speed-sensing steering, Split folding rear seat, Standard Suspension Package, Steering wheel mounted audio controls, Tachometer, Telescoping steering wheel, Tilt steering wheel, Traction control, Trip computer, Turn signal indicator mirrors, Variably intermittent wipers, Ventilated front seats, Voltmeter, Wireless Charging, Sierra 3500HD Denali, 4D Crew Cab, Duramax 6.6L V8 Turbodiesel, Allison 1000 6-Speed Automatic, 4WD, Jet Black Leather, 110-Volt AC Power Outlet, 150 Amps Alternator, 8" Multi-Color Customizable Driver Display, Auto-Dimming Inside Rear-View Mirror, Chrome Bodyside Moldings, Chrome Door Hand