Used 2021 GMC Sierra 1500 AT4

Description for 2021 GMC Sierra 1500 AT4 Crew Cab

The 2021 GMC Sierra 1500 AT4 Crew Cab blends rugged off-road capability with upscale refinement, delivering a truck that's as comfortable on the trails as it is on the highway. Finished in a striking Summit White exterior, the Sierra AT4 commands attention with its bold black chrome grille, red recovery hooks, and signature C-shaped LED headlamps that define its aggressive, athletic stance. The muscular body lines, 18-inch machined aluminum wheels with Goodyear Wrangler DuraTrac all-terrain tires, and unique AT4 badging emphasize its adventurous spirit, while body-color bumpers and black accents provide a sleek, modern finish. With a factory lift and off-road suspension, the AT4 stands tall, confident, and ready for anything.

Under the hood, the Sierra AT4 is powered by the robust 5.3-liter EcoTec3 V8 engine paired with a 10-speed automatic transmission, delivering 355 horsepower and 383 lb-ft of torque. The engine's Dynamic Fuel Management system enhances efficiency without compromising performance. GMC's advanced 4WD system with a two-speed transfer case ensures traction in all conditions, while the off-road-tuned Rancho monotube shocks and Eaton locking rear differential provide confidence over challenging terrain. Hill Descent Control and the integrated trailering package make towing and trail driving effortless. Built for strength and precision, the Sierra AT4 balances raw power with refined control, making it an exceptional choice for drivers who crave adventure with sophistication.

Inside, the AT4's cabin redefines off-road luxury with premium materials and advanced technology. The spacious Crew Cab features Jet Black leather-appointed seats accented with Kalahari stitching, creating a bold yet elegant interior theme exclusive to the AT4 trim. Both front seats are heated and ventilated, while the heated steering wheel and heated rear seats ensure comfort in every season. The 8-inch GMC Infotainment System touchscreen integrates Apple CarPlay, Android Auto, Bluetooth, and navigation for seamless connectivity. Additional features include a wireless charging pad, dual-zone automatic climate control, and a power sliding rear window. A premium Bose sound system delivers rich, immersive audio, while thoughtful details like real aluminum trim and soft-touch surfaces add refinement to its rugged nature.

Safety and innovation are integral to the AT4's design, equipped with GMC's Pro Safety suite that includes Forward Collision Alert, Lane Keep Assist with Lane Departure Warning, Automatic Emergency Braking, and Front Pedestrian Braking. The HD Rear Vision Camera and available HD Surround Vision enhance visibility when maneuvering, while Trailer Sway Control, Hill Start Assist, and StabiliTrak electronic stability control ensure confidence while towing or off-roading. The truck's bed is both durable and functional, featuring LED lighting, a spray-in bedliner, and the MultiPro Tailgate with six unique configurations for easy loading, unloading, and workspace flexibility.

As part of the Walt Massey family of dealerships, this Sierra qualifies for a complimentary 3-month/3,000-mile powertrain warranty on eligible used cars through Owner Services, Inc. This coverage includes major components such as the engine, transmission, and drive axle, along with towing assistance and rental reimbursement for unexpected breakdowns. Combining rugged power, advanced technology, and premium comfort, the 2021 GMC Sierra 1500 AT4 Crew Cab stands as the ultimate off-road luxury truck-engineered to conquer tough terrain while offering first-class comfort and unmistakable GMC craftsmanship.

Visit us at 1480 Highway 98 East Columbia MS 39429 for a test drive.