This 2021 GMC Sierra 2500HD AT4 delivers the capability and refinement you need from a heavy-duty truck. With its Duramax 6.6L V8 Turbodiesel engine producing 445 horsepower and 910 lb-ft of torque, paired with a 10-speed automatic transmission and 4WD, this truck is engineered to handle demanding work and challenging terrain with confidence.

– Power Sunroof
– Gooseneck/5th Wheel Prep Package with Bed View Camera
– Rear Camera Mirror with 15″ Diagonal Head-Up Display
– Forward Collision Alert, Lane Departure Warning, and Automatic Emergency Braking
– HD Surround Vision with Trailer View Camera Provisions
– 8″ Premium GMC Infotainment System with Navigation
– Bose Premium Audio System
– 20″ Machined Aluminum Wheels with Black Accents
– Heated and Ventilated Front Bucket Seats
– Wireless Phone Projection and Charging
– Universal Home Remote
– Rear Sliding Power Window
– 2-Speed Active Transfer Case
– Lane Change Alert with Side Blind Zone Alert
– Integrated Trailer Brake Controller

The AT4 package elevates your experience with premium appointments and practical features designed for both work and daily driving. The truck Bed includes a spray-on liner with AT4 logo, red recovery hooks, and LED cargo area lighting for visibility and durability. Inside, you’ll find heated and ventilated front seats, a comprehensive driver information center, and convenient power outlets throughout the cabin—including 120-volt options for powering equipment or accessories.

Advanced technology enhances both safety and utility. The suite of driver assistance features provides peace of mind with forward collision detection, lane departure warnings, and automatic emergency braking. The integrated trailer brake controller, hitch guidance with hitch view, and in-vehicle trailering system app make towing straightforward and secure. The 360-degree surround vision with trailer camera provisions gives you complete awareness when maneuvering.

Every detail reflects the AT4’s commitment to capability. The 2-Speed Active Transfer Case provides seamless transitions between on-road and off-road driving. Hill Descent Control helps manage steep terrain safely. The heavy-duty front spring and camper package demonstrates this truck’s readiness for varied applications. Premium floor liners with removable carpet inserts protect the cabin while maintaining refinement.

Connectivity and convenience integrate seamlessly into your daily routine. Apple CarPlay and Android Auto compatibility keep you linked to your devices. SiriusXM satellite radio with 360L expands your entertainment options. The OnStar and GMC Connected Services capability provides remote access and assistance when you need it. Console-mounted safe storage offers a secure place for valuables.

This Sierra 2500HD AT4 combines the durability expected from a Duramax diesel with the thoughtful features and technology that make truck ownership more enjoyable. Whether you’re managing a job site, towing a trailer, or navigating city streets, this truck delivers the performance and sophistication to meet your demands. Come experience this capable truck in person and discover how it can serve your needs.