Meet the 2026 GMC Sierra 2500HD AT4, engineered for those who demand capability matched with refined comfort and advanced technology in a heavy-duty truck.
This Sierra 2500HD AT4 is equipped with an impressive array of features designed to enhance every drive:
- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD
- X31 Off-Road Package
- Preferred Equipment Group 4SB
- Bed View Camera with Two Trailer Camera Provisions
- HD Surround Vision with Rear Cross Traffic Alert and Trailer Side Blind Zone Alert
- Bose Premium 7-Speaker Sound System with SiriusXM 360L Trial Subscription
- Wireless Phone Projection and Apple CarPlay/Android Auto compatibility
- 2-Speed Active Transfer Case for enhanced terrain management
- Spray-on Pickup Bedliner with GMC Logo
- Heated and Ventilated front seats with Heated rear outboard seats
- Remote Vehicle Starter System with Push Button Start
- Ultrasonic Front and Rear Park Assist
- 20" High Gloss Black Aluminum Wheels
The diesel powerplant delivers the torque and pulling capability serious truck owners expect, while the 10-speed automatic works seamlessly to optimize performance across all driving conditions. With 4WD and the 2-Speed Active Transfer Case, you'll confidently tackle both highway miles and off-road terrain.
Inside, the cabin reflects GMC's commitment to driver satisfaction. Premium perforated leather-appointed front seats feature heating and ventilation, with the driver's seat offering 10-way power adjustment and lumbar support. Wireless charging, dual USB charging ports in the center console, and both 120-volt bed and instrument panel power outlets keep your devices ready and your workflow uninterrupted. The Bose premium audio system paired with wireless phone projection integrates seamlessly into your daily routine.
Safety and situational awareness are paramount in this design. The comprehensive camera systemâ"including bed view, trailer camera provisions, and surround visionâ"combined with advanced alerts like Rear Cross Traffic Alert and Trailer Side Blind Zone Alert, provides the visibility you need. Features such as Automatic Emergency Braking, Forward Collision Alert, and Lane Departure Warning Layer in additional protection for you and your passengers.
The AT4 trim brings distinctive styling with the Gloss Black header grille and 20-inch High Gloss Black aluminum wheels, paired with the off-road-capable suspension and Hill Descent Control. Whether you're working or exploring, this truck is ready.
This 2026 GMC Sierra 2500HD AT4 represents the intersection of power, technology, and sophisticated capability. We invite you to experience it firsthand at our showroom.
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