Driving Good. Together. At Harry Browns, we focus on honesty, transparency, and treating people the right way. This Summit White 2021 GMC Sierra 3500HD AT4 is part of that promise - from your first question to every mile ahead. One Owner! What this vehicle includes: Driver Alert Package IPerimeter LightingUltrasonic Front and Rear Park AssistRear Cross Traffic AlertLane Change Alert with Side Blind Zone AlertDriver Alert Package IISafety Alert SeatIntelliBeam Automatic High Beam On/offFollowing Distance IndicatorForward Collision AlertLane Departure WarningAutomatic Emergency BrakingAT4 Premium Plus PackagePower Sunroof20" Machined Aluminum WheelsTechnology PackageAuto-Dimming Inside Rearview Mirror with Camera8" Driver Information CenterMulticolor 15" Diagonal Head-Up DisplayPreferred Equipment Group 4SBGMC Connected Access CapablePower Front Passenger Windows with Express Up/downPower Rear Windows with Express DownDeep-Tinted GlassKeyless Open and StartPower Door LocksPower Front Windows with Driver Express Up/downRear Wheelhouse LinersPremium Rear Floor Liners with Removable Carpet InsertPremium Front Floor Liners with Removable Carpet InsertRemote Vehicle Starter SystemElectric Rear-Window DefoggerSpray-On Pickup Bed Liner with AT4 LogoCompass Located in Instrument ClusterFloor-Mounted Center ConsolePainted Black Surround Grille with High Gloss Black MeshIntegrated Trailer Brake ControllerHeated Driver and Front Outboard Passenger Seats2nd Row Heated Outboard Seats120-Volt Bed Mounted Power Outlet120-Volt Instrument Panel Power Outlet12-Volt Rear Auxiliary Power OutletVentilated Driver and Front Passenger Seats2 USB Ports Inside Console2 USB Ports (first Row)Electrical Lock Control Steering ColumnManual Tilt-Wheel/telescoping Steering Column2-Speed Active Transfer CaseProGrade Trailering System4.2" Diagonal Color Display Driver Info CenterOnStar and GMC Connected Services CapableLED Cargo Area LightingRed Recovery HooksSteering Wheel Audio Controls2nd Row Dual USB Charge-Only PortsUnauthorized Entry Theft-Deterrent SystemHD Rear Vision Camera4G LTE Wi-Fi Hotspot CapableWireless Phone ProjectionX31 Off-Road PackageGooseneck/5th Wheel PackageGooseneck/5th Wheel Prep PackageAT4 Preferred PackageSnow Plow Prep/camper PackageSkid Plates Safety and Security Forward collision mitigation - Forward thinking. You look away for just a second and suddenly the vehicle in front of you has stopped. That's when the forward collision mitigation system comes to life. When it senses an impending impact, it will activate a combination of features to help prevent or reduce the severity of an accident. Forward collision mitigation is always looking ahead. Rear camera - Watching your back! The rear camera helps you see obstacles and hazards you otherwise couldn't by showing enhanced images of what is behind you. The rear camera is an extra set of eyes that's both convenient and safe.Technology and Telematics Smart device mirroring - Smartphone, meet smart car. You can control your device through your vehicle's infotainment system. Smart device mirroring brings together safety and convenience by making it easier to find what you're looking for while keeping your eyes on the road. Apple CarPlay/Android Auto smart device wireless mirroring Mobile hotspot - WiFi on the fly. Connect your devices to the Internet through your vehicles private mobile hotspot and take the internet wherever your journey takes you, without eating up your data allowance. Find the hotspot with mobile hotspot. EMISSIONS, FEDERAL REQUIREMENTS, ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE, TRANSMISSION, ALLISON 10-SPEED AUTOMATIC, GVWR, 12,100 LBS. (5488 KG) WITH SINGLE REAR WHEELS, REAR AXLE, 3.42 RATIO, WHEELS, 20" (50.8 CM) MACHINED ALUMINUM, TIRES, LT275/65R20 ALL-TERRAIN, BLACKWALL, SUMMIT WHITE, SEATS, FRONT BUCKET WITH CENTER CONSOLE, JET BLACK WITH KALAHARI ACCENTS, PERFORATED FRONT LEATHER SEATING SURFACES, AUDIO SYSTEM, PREMIUM GMC INFOTAINMENT SYSTEM W