This 1-owner 2021 GMC Sierra 2500HD AT4 is a capable work truck and weekend warrior rolled into one, built to handle serious demands with refined comfort for the driver.

- Duramax 6.6L V8 Turbodiesel engine with 445 hp and 910 lb-ft of torque
- 10-Speed Automatic transmission with 4WD
- AT4 Premium Plus Package with premium features and technology enhancements
- Power-retractable black assist steps with LED lighting
- 20 machined aluminum wheels with high gloss black accents
- Integrated Trailer Brake Controller with trailer tire pressure monitor sensors
- Premium GMC Infotainment System with navigation and 8 color display
- Bose Premium 7-speaker sound system with SiriusXM
- Heated and ventilated front bucket seats with 10-way power adjustment
- Power sunroof
- HD Surround Vision with bed view camera and trailer camera provisions
- Wireless charging and wireless phone projection
- 120-volt bed-mounted and instrument panel power outlets
- Spray-on pickup box bed liner with AT4 logo
- Remote vehicle starter system with keyless open and start

The diesel powertrain delivers the torque you need for towing and hauling, while the 10-speed automatic transmission ensures smooth, responsive shifts whether you're on the highway or navigating job sites. The AT4 Premium Plus Package elevates the ownership experience with 20 machined aluminum wheels, a power sunroof, and comprehensive technology features that blend capability with everyday convenience.

Interior appointments reflect GMC's commitment to comfort and functionality. Heated and ventilated front seats with 10-way power adjustment keep you comfortable through long drives, while the premium Bose audio system transforms your commute. The premium infotainment system with navigation puts control at your fingertips, complemented by wireless phone projection and wireless charging for seamless connectivity.

Trailering and hauling are simplified with integrated trailer brake control, trailer tire pressure monitoring, and the in-vehicle trailering app. The truck comes equipped with 5th wheel and gooseneck trailer wiring provisions and a hitch guidance system with hitch view camera, making towing safer and more precise. The spray-on bed liner protects your investment while maintaining the AT4's rugged aesthetic.

Safety features include automatic emergency braking, lane departure warning, rear cross traffic alert, and ultrasonic front and rear park assist. The HD surround vision system and bed view camera provide comprehensive visibility, critical when maneuvering in tight spaces or reversing with a trailer.

This Sierra 2500HD is finished in white with a painted black surround grille and red recovery hooks that define the AT4's purposeful stance. The truck combines serious capability with the refinement you expect from a premium heavy-duty truck, ready for whatever you bring to the bed.