Certification Program Details: This CarBravo Certified Pre-Owned vehicle isn't just good-lookingit's been through a rigorous 134-point inspection to earn its badge. It's backed by a 12-month/12,000-mile bumper-to-bumper limited warranty that kicks in after the original manufacturer warranty endsso in many cases, you're covered even longer. Add in competitive financing rates that often match new car offers and 24/7 roadside assistance, and it's got your back from day one. You'll also get a CARFAX® Vehicle History Report and a 7-day/500-mile exchange policy, just in case you change your mind (but we bet you won't). Drive with confidencethe Williams Way. This 2021 GMC Sierra 1500 AT4 in gray combines capability with sophisticated technology. Powered by an EcoTec3 6.2L V8 producing 420 horsepower and 460 lb-ft of torque, it delivers the performance you expect from a full-size truck. The engine features Dynamic Fuel Management, allowing it to operate in 17 different patterns between 2 and 8 cylinders to optimize both power and efficiency based on driving demands. - Power Sunroof - Technology Package with HD Surround Vision and Rear Camera Mirror - Multicolor 15" Diagonal Head-Up Display - Bed View Camera and HD Surroundings Vision - Driver Alert Package II with Automatic Emergency Braking - Forward Collision Alert and Lane Keep Assist with Lane Departure Warning - Adaptive Cruise Control with Following Distance Indicator - IntelliBeam Automatic High Beam Control - Premium GMC Infotainment System with Navigation - SiriusXM with 360L - Apple CarPlay and Android Auto - Wireless Charging - Heated and Ventilated Front Seats with 10-Way Power Adjustment - Spray-On Pickup Bed Liner with AT4 Logo - Perforated Leather-Appointed Front Seat Trim The truck rides on LT275/65R18C MT blackwall Goodyear Wrangler DuraTrac tires mounted on 18" machined aluminum wheels. An off-road suspension system paired with an auto-locking rear differential provides the foundation for serious terrain capability. The ProGrade Trailering System, integrated trailer brake controller, and hitch guidance keep you in control whether you're working or adventuring. The AT4 high clearance step eases entry and exit, while red recovery hooks offer additional utility. This vehicle has achieved CarBravo Certification, which means it meets stringent standards across safety, mechanical performance, and overall condition. Every certified vehicle undergoes comprehensive testing before earning its status, giving you the assurance that you're purchasing a truck that has been vetted and verified to deliver reliable performance. Inside, the Sierra delivers comfort and connectivity. Dual-zone automatic climate control keeps passengers comfortable in any season. Heated door mirrors, a heated steering wheel, and remote vehicle starter make cold mornings manageable. The 4G LTE Wi-Fi hotspot capability keeps you connected on the job or the road. Safety features throughout the truck reflect GMC's commitment to driver and passenger protection. The Driver Alert Package II includes automatic emergency braking, front pedestrian braking, lane keep assist with lane departure warning, and adaptive cruise control. Additional features like rear cross traffic alert, ultrasonic front and rear park assist, and a comprehensive airbag system work together to help prevent accidents and protect occupants. With 15 city MPG and 19 highway MPG, this 6.2L V8-powered Sierra balances the capability you need with reasonable fuel efficiency for a truck of this class. Whether you're using it for daily transportation, weekend adventures, or heavy-duty work, this 2021 GMC Sierra 1500 AT4 is ready to perform. Visit our showroom to experience this dependable truck firsthand and discuss how it can serve your lifestyle.

Additional Information

AT4 Preferred Package,AT4 Premium Package,Driver Alert Package I,Driver Alert Package II,Preferred Equipment Group 4SB,Technology Package,Trailering Package,6 Speakers,6-Speaker Audio System Feature,AM/FM radio: SiriusXM with 360L,Premium audio system: GMC Infotainment System,Premium Bose 7-Speaker Sound System,Radio data system,Radio: Premium GMC Infotainment Sys w/Multi-Touch,Radio: Premium GMC Infotainment Sys w/Navigation,SiriusXM w/360L,Steering Wheel Audio Controls,Air Conditioning,Automatic temperature control,Electric Rear-Window Defogger,Front dual zone A/C,Rear window defroster,12-Volt Rear Auxiliary Power Outlet,120-Volt Bed Mounted Power Outlet,120-Volt Instrument Panel Power Outlet,Driver Memory,Memory seat,Power driver seat,Power Front Passenger Windows w/Express Up/Down,Power Front Windows w/Driver Express Up/Down,Power Rear Windows w/Express Down,Power steering,Power windows,Remote keyless entry,Remote Vehicle Starter System,Steering wheel mounted audio controls,Universal Home Remote,Auto-Locking Rear Differential,Electrical Lock Control Steering Column,Manual Tilt-Wheel & Telescoping Steering Column,Off-Road Suspension,Speed-sensing steering,Traction control,4-Wheel Disc Brakes,ABS brakes,Dual front impact airbags,Dual front side impact airbags,Front anti-roll bar,Front wheel independent suspension,Keyless Open & Start,Low tire pressure warning,Occupant sensing airbag,Overhead airbag,Power Door Locks,Power Sunroof,Brake assist,Electronic Stability Control,Hill Descent Control,Delay-off headlights,Front fog lights,Fully automatic headlights,Perimeter Lighting,Panic alarm,Security system,Theft Deterrent System (Unauthorized Entry),Adaptive Cruise Control,Speed control,170 Amp Alternator,Auxiliary External Transmission Oil Cooler,Heavy-Duty Air Filter,AT4 High Clearance Step (LPO),Auto-dimming door mirrors,Body-Color Surround Grille,Bumpers: body-color,Heated door mirrors,IntelliBeam Automatic High Beam On/Off,LED Cargo Area Lighting,Power door mirrors,ProGrade Trailering System,Rear step bumper,Rear Wheelhouse Liners,Spray-On Pickup Bed Liner w/AT4 Logo,2 USB Ports,2 USB Ports (1st Row),4.2" Diagonal Color Display Driver Info Center,4G LTE Wi-Fi Hotspot Capable,8" Driver Information Center,Apple CarPlay/Android Auto,Auto-dimming Rear-View mirror,Automatic Emergency Braking,Bed View Camera,Color-Keyed Carpeting Floor Covering,Compass,Driver door bin,Driver vanity mirror,Floor-Mounted Center Console,Following Distance Indicator,Forward Collision Alert,Front Pedestrian Braking,Front Prem Floor Liners w/Removable Carpet Insert,Front reading lights,GMC Connected Access Capable,HD Rear Vision Camera,HD Surround Vision w/2 Trailer View Camera Provisions,Heated steering wheel,Illuminated entry,Lane Change Alert w/Side Blind Zone Alert,Lane Keep Assist w/Lane Departure Warning,Multicolor 15" Diagonal Head-Up Display,OnStar & GMC Connected Services Capable,Outside temperature display,Overhead console,Passenger vanity mirror,Rear Camera Mirror,Rear Cross Traffic Alert,Rear Dual USB Charging-Only Ports,Rear Prem Floor Liners w/Removable Carpet Insert,Rear reading lights,Rear seat center armrest,Safety Alert Seat,Tachometer,Telescoping steering wheel,Tilt steering wheel,Trip computer,Ultrasonic Front & Rear Park Assist,Voltmeter,Wireless Charging,10-Way Power Driver Seat Adjuster w/Lumbar,10-Way Power Passenger Seat Adjuster w/Lumbar,Front Bucket Seats,Front Center Armrest,Heated 2nd Row Outboard Seats,Heated Driver & Front Outboard Passenger Seating,Heated front seats,Perforated Leather-Appointed Front Seat Trim,Power passenger seat,Split folding rear seat,Ventilated Driver & Front Passenger Seats,Ventilated front seats,Passenger door bin,Hitch Guidance,Hitch Guidance w/Hitch View,In-Vehicle Trailering App,Integrated Trailer Brake Controller,Red Recovery Hooks,18" x 8.5" Machined Aluminum Wheels,Alloy wheels,Deep-Tinted Glass,Power Sliding Rear Window w/Rear Defogger,Variably intermittent wipers,3.23 Rear Axle Ratio