Certified Pre-Owned 2021 GMC Sierra 1500 AT4

Description for 2021 GMC Sierra 1500 AT4 Crew Cab

The 2021 GMC Sierra 1500 AT4 delivers rugged capability, bold design, and premium refinement in a truck built to conquer any terrain while keeping its driver and passengers comfortable in style. Finished in a commanding exterior color that accentuates its athletic stance, the Sierra AT4 stands apart with its dark chrome grille, body-color bumpers, and exclusive red vertical tow hooks that highlight its off-road pedigree. LED C-shaped headlamps, fog lamps, and taillights give it a modern, aggressive look, while the 18-inch machined aluminum wheels with all-terrain tires and a 2-inch factory lift provide both visual appeal and true off-road performance.

Under the hood, the 2021 Sierra AT4 is powered by a 5.3-liter EcoTec3 V8 engine producing 355 horsepower and 383 lb-ft of torque, paired with a 10-speed automatic transmission for smooth and responsive power delivery. This proven combination provides confident towing capability-up to 9,200 pounds when properly equipped-while maintaining balanced performance on and off the road. GMC's advanced Autotrac 2-speed transfer case with selectable drive modes allows you to seamlessly shift between 2WD, 4WD, and automatic modes for maximum traction and control in all conditions. The AT4's off-road suspension with Rancho monotube shocks, Hill Descent Control, and skid plates make it ready for challenging trails while maintaining a comfortable ride on paved roads.

Inside, the Sierra AT4 blends rugged durability with refined craftsmanship. The interior features Jet Black leather-appointed seats with Kalahari accents, heated and ventilated front seats, and a heated steering wheel for year-round comfort. The power-adjustable driver's seat with memory function and dual-zone automatic climate control add to its premium feel, while the spacious Crew Cab configuration ensures abundant legroom for all passengers. The soft-touch surfaces, aluminum trim, and thoughtful details throughout the cabin create a refined atmosphere without sacrificing practicality.

Technology in the AT4 is designed to enhance convenience and connectivity wherever your journey takes you. The 8-inch GMC Premium Infotainment System includes wireless Apple CarPlay, Android Auto, and Bluetooth connectivity. Voice recognition, an available navigation system, and a 4G LTE Wi-Fi hotspot ensure you stay connected even in remote areas. The available Bose premium sound system fills the cabin with crisp, immersive audio, and multiple USB ports keep devices charged. Additional features like a wireless charging pad, remote start, and keyless open and start make the driving experience effortless.

Safety and driver assistance features give you added confidence on every adventure. The Sierra AT4 includes advanced systems such as Forward Collision Alert, Automatic Emergency Braking, Lane Keep Assist with Lane Departure Warning, Front and Rear Park Assist, and IntelliBeam automatic high beams. The available HD Surround Vision camera system provides a 360-degree view around the truck, while the Hitch Guidance and Trailer Tire Pressure Monitoring systems simplify towing.

The 2021 GMC Sierra 1500 AT4 is the perfect combination of off-road strength and upscale comfort. It's designed for those who want the rugged capability of a true 4x4 paired with the refinement and innovation of a luxury vehicle. Whether you're hauling heavy loads, exploring the trails, or simply cruising in comfort, the Sierra AT4 delivers the power, confidence, and sophistication that define GMC's professional-grade engineering.

Walt Massey dealerships proudly include a complimentary 3-month/3,000-mile powertrain warranty on eligible used vehicles through Owner Services, Inc. This coverage protects major components such as the engine, transmission, and drive axle, and includes towing assistance and rental reimbursement for unexpected breakdowns-giving you peace of mind long after you drive off the lot.