Full Description: This is a 1 owner truck fully loaded! Factory 2 inch lift The 2020 GMC Sierra AT4 delivers a unique blend of distinctive premium style advanced technology and off-road capability in a full-size pickup truck but the new 2020 Sierra AT4 Off-Road Performance Package further extends AT4s credentials and capabilities both on and off-road.Thanks to these additions the AT4 Off-Road Package delivers 435 horsepower and 469 lb-ft of torque - increases of 15 horsepower and 9 lb-ft of torque over a Sierra equipped with a conventional 6.2L V8 engine and 80 horsepower and 86 lb-ft of torque over Sierra AT4 models equipped with the standard 5.3L V8. ierra AT4s off-road abilities are fortified with specialized equipment all purposefully engineered for venturing off the beaten trail.To start AT4s unique suspension design which also incorporates Rancho monotube shock absorbers allows it to ride two inches taller than other Sierra models providing added ground clearance. A series of underbody skid plates help shield various chassis cooling and driveline components from debris while hill descent control leverages anti-lock braking technology to help provide a smooth controlled descent in uneven terrain without the driver needing to repeatedly push the brake pedal. Sierra AT4 also includes the new Traction Select System which allows the driver to choose from preset drive modes that help tailor Sierras performance for a variety of road terrain or weather conditions.A standard 2-speed transfer case provides low-range gearing for challenging conditions while a locking rear differential further helps optimize traction in slick conditions. For additional grip and traction off-road the Sierra AT4 Off-Road Performance Package also fits 18'' Goodyear Wrangler DuraTrac mud-terrain tires to AT4s exclusive wheels with dark chrome accents. As always Sierra AT4 pairs its authentic capabilities with a bold athletic look delivered by way of distinctive finishes and modern precise detailing. AT4s front and rear bumpers along with its grille surround are painted body color. Meanwhile AT4s fog lamp bezels fender badging and exclusive grille insert the latter boasting knurled accents - are finished in black chrome. Touches of bright red notably on Sierra AT4s large vertical front recovery hooks further help AT4 stand out from the crowd. Of course smart functionality is built into Sierra AT4s distinctive form at every turn. Sierra AT4s cargo box for instance offers best-in-class cargo volume and also offers an available 120-volt electric power outlet to power tools lights or other accessories. Available GearOn rails within the box allow for bike racks kayak carriers and other accessories to be quickly and easily installed or adjusted. Performance is a key ingredient to every Sierra AT4 and the Sierra AT4 Off-Road Performance Package takes the AT4s abilities a step further. Not only does the AT4 Off-Road Performance Package include the 6.2L V8 with Dynamic Fuel Management and a ten speed automatic transmission it also includes a specially-designed Cold Air Intake and Performance Exhaust System. Both the intake and exhaust system are designed to not only optimize performance but also deliver an unmistakably sporty exhaust note. Loading or unloading cargo is also easier thanks to Sierra AT4s standard MultiPro Tailgate. This world's first design can be used in six different configurations allowing both easier access to the box itself along with enhanced second-tier loading and load-stop solutions. Dropping both the primary and inner tailgates and unfolding the lower step make climbing into the bed even with AT4s elevated ride height simple and straightforward. The half-ton GMC pickup can tow up to 12200 pounds and support a payload up to 2240 pounds when properly equipped.ENGINE 6.2L ECOTEC3 V8|4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)|Audio system feature 6-speaker system|Radio HD|Steering wheel audio controls|Bumper front body-color lower (Front bumper color will be high gloss black.)|Bumper rear body-color with corner steps|CornerStep rear bumper|Door handles body-color|Fog lamps LED|Glass deep-tinted|Grille (Body-color surround with high gloss Black mesh and Black chrome inserts. With (PCP) AT4 CarbonPro Edition the grille will have a unique grille surround with Black Chrome finish.)|LED Cargo Area Lighting located in cargo box activated with switch on center switch bank or key fob|Lamps cargo area cab mounted integrated with center high mount stop lamp with switch in bank on left side of steering wheel.|Mirror caps high gloss Black|Tailgate and bed rail protection caps top|Tailgate GMC MultiPro Tailgate with six functional load/access features|Tailgate gate function manual with EZ Lift includes power lock and release includes hitch area light|Taillamps LED signature taillight with LED stop and reverse light|Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door|Wheel 17 x 8 (43.2 cm x 20.3 cm) full-size steel spare|Wheelhouse liners rear|Air conditioning dual-zone automatic climate control|Air vents rear|Assist handles front A-pillar mounted for driver and passenger rear B-pillar mounted|Brake lining wear indicator|Center Console floor-mounted with cup holders cell phone storage power cord management hanging file folder capability|Compass located in instrument cluster|Driver Information Center 4.2 diagonal color display includes driver personalization|Exterior Temperature Display located in radio display|Floor covering color-keyed carpeting|GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details.)|In-vehicle Trailering App System includes checklist trailer maintenance reminders trailer security alerts trailer mileage tow/haul reminder and trailer electrical diagnostics|Instrument cluster 6-gauge cluster featuring speedometer fuel level engine temperature tachometer voltage and oil pressure|LPO All-weather floor liners 1st and 2nd rows (includes AT4 logo)|Power outlet bed mounted 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)|Power outlet instrument panel 120-volt (400 watts shared with (KC9) bed mounted power outlet)|Remote vehicle starter system|Seat adjuster driver 10-way power including lumbar|Seat adjuster passenger 10-way power including lumbar|Seat Up-level Rear with Storage Package 60/40 folding bench for Crew Cab models includes full-length bench seat seatback storage on left and right side center fold out armrest with 2 cupholders full cab width under-seat storage (includes child seat top tether anchor)|Seats heated second row outboard seats (Requires a Crew Cab model.)|Steering column lock control electrical|Steering column manual Tilt-Wheel and telescoping|Steering wheel heated|Steering wheel leather-wrapped|Theft-deterrent system unauthorized entry|USB ports dual charge-only (2nd row)|Air filter high-capacity|Alternator 170 amps (Included and only available with (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine. Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)|Automatic Stop/Start|Battery heavy-duty 730 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L84) 5.3L EcoTec3 V8 engine (L3B) 2.7L Turbo engine and (L87) 6.2L EcoTec3 V8 engine.)|Brakes 4-wheel antilock 4-wheel disc with DURALIFE rotors|Capless Fuel Fill|Cargo tie downs (12) fixed rated at 500 lbs per corner|Cooling auxiliary external transmission oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)|Cooling external engine oil cooler (Not available with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)|Differential heavy-duty locking rear|Exhaust aluminized stainless-steel muffler and tailpipe|Exhaust dual with premium tips (With (PCP) AT4 CarbonPro Edition the exhaust tips will be black.)|Four wheel drive|Frame fully-boxed hydroformed front section|GVWR 7000 lbs. (3175 kg) (Requires Crew Cab model with (L84) 5.3L EcoTec3 V8 engine or (L87) 6.2L EcoTec3 V8 engine. Requires Double Cab model with (LM2) Duramax 3.0L Turbo-Diesel I6 engine.)|Hill Descent Control|Pickup bed|Rear axle 3.23 ratio|Recovery hooks Red|Skid Plates|Steering Electric Power Steering (EPS) assist rack-and-pinion|Suspension Off-Road with 2 factory installed lift and monotube shocks|Trailer brake controller integrated|Transfer case two-speed electronic Autotrac with push button control (4WD models only)|ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (U1D) In-vehicle Trailering App|Trailering Package includes trailer hitch 7-pin and 4-pin connectors and (CTT) Hitch Guidance|Airbags Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)|Hitch Guidance|Rear Seat Reminder|StabiliTrak stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist|Teen Driver mode a configurable feature that lets you activate customizable vehicle settings associated with a key fob to help encourage safe driving behavior. It can limit certain available vehicle features and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver|Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire)