Certified. 2018 GMC Sierra 1500 SLT Onyx Black Check out all these great options All Terrain X Package (1st & 2nd Row Color-Keyed Carpeted Floor Mats, All-Weather Floor Liner (LPO), Black Mirror Caps, Body Color Bodyside Moldings, Body Color Door Handles, High-Performance LED Headlamps, and Wheels: 18" x 8.5" 5-Spoke Black Paint Alloy), All-Terrain Package (10-Way Power Driver's Seat Adjuster, Body Color Lower Front Bumper, Body Color Rear Bumper w/Cornersteps, Bose Speaker System, Floor Mounted Console, Front Full Feature Power Reclining Bucket Seats, Heated Driver & Front Passenger Seats, Spray-On Pickup Box Bed Liner w/GMC Logo, and Wireless Charging), Off-Road Suspension Package (Hill Descent Control), Preferred Equipment Group 4SA (110-Volt AC Power Outlet, 150 Amp Alternator, 2-Speed Active Electronic AutoTrac Transfer Case, 4.2" Diagonal Color Display Driver Info Center, Auto-Dimming Inside Rear-View Mirror, Auxiliary External Transmission Oil Cooler, Chrome Bodyside Moldings, Chrome Door Handles, Chrome Mirror Caps, Color-Keyed Carpeting, Deep-Tinted Glass, Driver & Front Passenger Illuminated Vanity Mirrors, Dual-Zone Automatic Climate Control, Electric Rear-Window Defogger, EZ Lift & Lower Tailgate, Front Frame-Mounted Black Recovery Hooks, GMC 4G LTE, GMC Connected Access, Heavy-Duty Rear Locking Differential, Leather Wrapped Steering Wheel w/Cruise Controls, LED Cargo Box Lighting, LED Tailamps w/Signature, Manual Tilt/Telescoping Steering Column, OnStar & GMC Connected Services Capable, Power Adjustable Pedals, Power Folding & Adjustable Heated Outside Mirrors, Power Windows w/Driver Express Up & Down, Rear 60/40 Folding Bench Seat (Folds Up), Rear Wheelhouse Liners, Remote Keyless Entry, Remote Vehicle Starter System, Single Slot CD/MP3 Player, Steering Wheel Audio Controls, Theft Deterrent System (Unauthorized Entry), Thin Profile LED Fog Lamps, and Universal Home Remote), SLT Preferred Package (Leather Wrapped Heated Steering Wheel and Power Sliding Rear Window w/Defogger), Trailering Equipment, 3.08 Rear Axle Ratio, 3.42 Rear Axle Ratio, 4-Wheel Disc Brakes, 40/20/40 Front Split Bench Seat, 6 Speakers, 6-Speaker Audio System, ABS brakes, Adjustable pedals, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Automatic temperature control, Bodyside moldings, Brake assist, Bumpers: chrome, Cat-Back Performance Exhaust (LPO), CD player, Compass, Composite Storage Bin Under Rear Seat, Console Insert Organizer Tray (LPO), Cruise Control, Delay-off headlights, Driver door bin, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electronic Stability Control, Exterior Parking Camera Rear, Front anti-roll bar, Front Center Armrest w/Storage, Front dual zone A/C, Front fog lights, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, Garage door transmitter, HD Radio, Heated door mirrors, Heated Front Seats, Heavy Duty Suspension, High-Intensity Discharge Headlights, Illuminated entry, Integrated Trailer Brake Controller, Leather Appointed Seat Trim, Low tire pressure warning, Memory seat, Occupant sensing airbag, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Power door mirrors, Power driver seat, Power passenger seat, Power steering, Power windows, Premium audio system: GMC Infotainment System, Radio data system, Radio: AM/FM/GMC Infotainment System, Rear reading lights, Rear seat center armrest, Rear step bumper, Rear window defroster, Remote keyless entry, Security system, SiriusXM Satellite Radio, Speed-sensing steering, Split folding rear seat, Steering wheel mounted audio controls, Tachometer, Telescoping steering wheel, Tilt steering wheel, Traction control, Trip computer, Turn signal indicator mirrors, Ultrasonic Front & Rear Park Assist, Variably intermittent wipers, Voltmeter, and Wheels: 18"