2021 GMC Sierra 1500 AT4: Premium Off-Road Performance and Diesel Power
The 2021 GMC Sierra 1500 AT4 Crew Cab is built for drivers who demand serious capability without compromising on premium comfort. Designed to take on demanding jobs and rugged terrain alike, this factory-certified truck delivers a commanding presence on and off the pavement. Whether hauling equipment across properties around Perkins or heading out for a weekend outdoor excursion, the AT4 trim provides the high-grade utility and refined interior expected from a GMC truck. Feel free to explore our pre-owned inventory to see how this truck stands out among modern half-ton pickups.
Performance and Off-Road Capability
Under the hood, this Sierra 1500 features a powerful Duramax 3L I-6 direct injection, DOHC, variable valve control, intercooled turbo, diesel, engine with 277HP. Power is managed seamlessly by a 10-Speed Automatic transmission and a robust Four Wheel Drive system, achieving an EPA-estimated 16 city / 21 hwy mpg. Engineered for challenging environments, the AT4 package includes an Off-Road Suspension equipped with Rancho Shock Absorbers, an AutoTrac 2-Speed Transfer Case, and an Auto-Locking Rear Differential for uncompromising traction. Underbody protection is reinforced with two skid plates and black fender flares. For trailering tasks, this rig comes ready to work with the ProGrade Trailering System, Hitch Guidance with Hitch View, an Integrated Trailer Brake Controller, heavy-duty engine oil cooling, and an Engine Block Heater for reliable cold-weather operation.
Infotainment and Cabin Technology
Inside the spacious Crew Cab, the interior combines rugged materials with intuitive connectivity. The cabin features Jet Black Leather Front Seat Upholstery with Kalahari Accents, featuring Heated and Ventilated Driver and Front Passenger Seats with 10-way power adjustment and driver memory settings. Front and center is the GMC Infotainment System with an 8-inch primary touchscreen display, offering seamless Apple CarPlay and Android Auto integration along with Bluetooth hands-free connectivity and SiriusXM with 360L capability. Drivers stay informed via the 4.2-inch diagonal color display driver information center. Multiple power sourcesâ"including a 120-Volt Instrument Panel Power Outlet, a 120-Volt Bed Mounted Power Outlet, and 6 USB portsâ"keep all your electronics charged on the go. If you are planning your next upgrade, you can get pre-approved for financing right from home.
Key Highlights
- Duramax 3L Turbo-Diesel Engine - Delivers 277HP paired with a smooth-shifting 10-Speed Automatic transmission.
- Factory Off-Road Package - Features off-road suspension tuning, Rancho shock absorbers, and underbody skid plates.
- AutoTrac 4WD & Locking Rear Differential - Provides automatic four-wheel drive engagement and enhanced low-traction pull.
- Leather Interior with Kalahari Accents - Includes heated and ventilated front bucket seats with power lumbar support.
- Spray-On Bed Liner with AT4 Logo - Factory bed protection paired with LED in-box lighting and bed-rail protectors.
- ProGrade Trailering System - Equipped with hitch view guidance, trailer brake controller, and trailer sway control.
- MultiPro Tailgate & CornerStep Rear Bumper - Enhances bed access and loading utility for heavy gear.
- GMC Infotainment Touchscreen - Supports Apple CarPlay, Android Auto, and a 6-speaker sound system.
Visit Us
Ready to experience this 2021 GMC Sierra 1500 AT4 in person? Visit us at Paul Thigpen Ford of Waynesboro, located at 330 US, Waynesboro, GA 30830. You can get directions to our showroom, value your trade online, or give us a call at (706) 554-2114 to schedule your test drive today.
All vehicle pricing includes all offers and incentives. Prices do not include additional fees and a government fee, taxes, finance charges, dealer documentation fees, emissions testing fees, or other fees. All prices, specifications, and availability are subject to change without notice. Contact dealer for the most current information.
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