Meet the 2025 GMC Sierra 2500HD AT4, a heavy-duty truck engineered to handle the demands of work and life with commanding capability and refined comfort.

- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 2-Speed Active Transfer Case
- 4WD with Off-Road Suspension and Hill Descent Control
- X31 Off-Road Package for enhanced terrain capability
- Premium Bose 7-Speaker Sound System with SiriusXM 360L
- Apple CarPlay and Android Auto integration
- 10-Way Power Driver Seat with lumbar support and heating
- Perforated Leather-Appointed Front Seat Trim
- HD Surround Vision with Bed View Camera and Trailer Cam Provisions
- Heated and Ventilated Front Seats
- Spray-On Pickup Bedliner with GMC Logo
- Automatic Emergency Braking and Lane Departure Warning System
- Wireless Phone Projection and Charging
- 220-Amp Alternator and Engine Block Heater

The Duramax diesel engine delivers substantial torque for genuine towing and hauling work, while the 10-speed automatic provides smooth power delivery across varying conditions. Four-wheel drive with the active transfer case gives you confident control on any surface, and the off-road suspension combined with hill descent control makes challenging terrain manageable and secure.

Inside, the AT4 provides a commanding driving position with premium leather seating that heats and ventilates to keep you comfortable through long workdays. The power-adjustable driver seat includes lumbar support for added ergonomic benefit. Dual-zone climate control, a heated steering wheel, and available remote start ensure your cab is ready when you are.

Technology features support both work and convenience. The integrated trailering system provides hitch guidance and in-vehicle trailering software to simplify towing. The surround vision camera system with multiple viewing angles enhances awareness and safety. Apple CarPlay and Android Auto keep your smartphone seamlessly connected, while the SiriusXM 360L satellite radio keeps you entertained across any route.

Safety systems throughout the truck include automatic emergency braking, forward collision alert, and rear cross-traffic alert. Lane departure warning and trailer side blind zone alert provide additional protection. The truck is equipped with multiple airbags and an emergency communication system through OnStar.

The AT4 trim brings distinctive styling with its gloss black grille, 20-inch high-gloss black aluminum wheels, and spray-on bedliner featuring the GMC logo. LED cargo lighting and heated mirrors add practical refinement to this working truck.

This 2025 Sierra 2500HD AT4 combines serious capability with thoughtful amenities, making it ready for the next chapter of your journey.