Certified. 2020 GMC Sierra 2500HD AT4 CARFAX One-Owner. Summit White Check out all these great options AT4 Preferred Package (Bose Premium 7 Speaker Sound System, LED Smoked Amber Roof Marker Lamps, Power Sliding Rear Window w/Defogger, Radio: Premium GMC Infotainment Sys w/Navigation, Universal Home Remote, and Wireless Charging), AT4 Premium Package (Wheels: 20" 6-Spoke Bright Machined Aluminum), Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Perimeter Lighting, Rear Cross Traffic Alert, and Ultrasonic Front & Rear Park Assist), Driver Alert Package II (Automatic Emergency Braking, Following Distance Indicator, Forward Collision Alert, IntelliBeam Automatic High Beam On/Off, Lane Departure Warning System, and Safety Alert Seat), Gooseneck/5th Wheel Package, Gooseneck/5th Wheel Prep Package, Preferred Equipment Group 4SB (12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 1st & 2nd Rows All-Weather Floor Liners (LPO), 2 USB Ports, 2 USB Ports (1st Row), 2-Speed Active Transfer Case, 2nd Row Dual USB Charge-Only Ports, 4.2" Diagonal Color Display Driver Info Center, 4G LTE Wi-Fi Hotspot Capable, Compass Located In Instrument Cluster, Deep-Tinted Glass, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Floor-Mounted Center Console, GMC Connected Access Capable, HD Rear Vision Camera, Heated & Ventilated Front Bucket Seats, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seats, Integrated Trailer Brake Controller, Keyless Open & Start, LED Cargo Area Lighting, Manual Tilt-Wheel/Telescoping Steering Column, OnStar & GMC Connected Services Capable, Painted Black Surround Grille, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Rear Windows w/Express Down, Power Windows w/Driver Express Up/Down, Rear Wheelhouse Liners, Red Recovery Hooks, Remote Vehicle Starter System, Spray-On Pickup Box Bed Liner w/AT4 Logo, Steering Wheel Audio Controls, and Unauthorized Entry Theft-Deterrent System), Technology Package (8" Multicolor Driver Instrument Info Display, Bed View Camera, HD Surround Vision w/2 Trailer View Camera Provisions, Multicolor 15" Diagonal Head-Up Display, and Rear Camera Mirror), X31 Off-Road Package (Hill Descent Control), 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 220 Amps Alternator, 3.42 Axle Ratio, 3.73 Rear Axle Ratio, 4-Wheel Disc Brakes, 6 Speakers, 6-Speaker Audio System Feature, ABS brakes, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM, Apple CarPlay/Android Auto, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Automatic temperature control, Brake assist, Bumpers: body-color, Compass, Cruise Control, Delay-off headlights, Driver door bin, Driver Memory, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electronic Stability Control, Engine Block Heater, Exhaust Brake, Front anti-roll bar, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, HD Radio, Heated door mirrors, Heated Front Seats, Heated rear seats, Heated steering wheel, Heavy-Duty 80 Amp Battery, Hitch Guidance w/Hitch View, Illuminated entry, In-Vehicle Trailering System App, Low tire pressure warning, Memory seat, Occupant sensing airbag, Off-Road Assist Steps (LPO), Off-Road Suspension, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appointed Front Seat Trim, Pickup Box, Power door mirrors, Power driver seat, Power passenger seat, Power steering, Power Sunroof, Power windows, Premium audio system: Premium GMC Infotainment System, Radio: AM/FM w/Premium GMC Infotainment System, Rear reading lights, Rear seat center armrest, Rear step bumper, Rear window defroster, Remote keyless