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This 2026 GMC Sierra 2500HD AT4 In-Transit arrives with the commanding presence and capability you expect from a premium heavy-duty truck, finished in white and equipped with the legendary Duramax 6.6L V8 turbodiesel engine that delivers 470 horsepower and 975 lb-ft of torque for genuine work performance and towing authority.
- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft torque
- AT4 Preferred and Premium Packages with off-road capability
- Gooseneck/5th Wheel Prep and Hitch Package for heavy hauling
- X31 Off-Road Package with Hill Descent Control
- Universal Home Remote and Power Sunroof
- 20" High Gloss Black Aluminum Wheels with off-road suspension
- Multicolor 15" Head-Up Display for enhanced visibility
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Premium Bose 7-Speaker Sound System with SiriusXM 360L
- Technology Package with Apple CarPlay and Android Auto integration
- HD Surround Vision with Bed View and Trailer Camera provisions
- Wireless Phone Projection and Wireless Charging
- Heated and ventilated leather front seats with 10-way power adjusters
- Heated rear seats and heated steering wheel
- Advanced safety suite including Automatic Emergency Braking and surround camera systems
The AT4 trim represents GMC's commitment to both capability and comfort, combining serious truck functionality with refined interior appointments. The turbodiesel engine is paired with a 10-speed automatic transmission and 4WD, providing the efficiency and power delivery necessary for both highway cruising and challenging terrain. The off-road suspension and Hill Descent Control ensure this truck handles demanding conditions with confidence.
Inside, you'll find a thoughtfully designed cabin with perforated leather-appointed front seats, dual-zone automatic climate control, and a comprehensive technology suite. The Premium GMC Infotainment System features an intuitive interface with wireless Apple CarPlay and Android Auto connectivity, keeping you connected whether you're at the job site or on the road. Multiple USB ports, wireless charging, and in-vehicle power outlets ensure all your devices remain accessible and charged throughout the day.
Safety and convenience technologies are extensive throughout this truck. The surround camera system provides 360-degree visibility, while trailer-specific features including Hitch Guidance with Hitch View and the in-vehicle Trailering System App make towing straightforward and secure. Automatic Emergency Braking, Forward Collision Alert, and Rear Cross Traffic Alert work together to enhance driver awareness in all conditions.
The gooseneck and fifth-wheel preparation package demonstrates this truck's readiness for serious towing applications, while the spray-on bedliner with GMC logo protects your cargo area against the elements and everyday wear. The combination of work-ready features and refined comfort makes this Sierra 2500HD AT4 a versatile choice for those who demand excellence from their truck.
We invite you to visit and experience this Sierra 2500HD firsthand. The truck is in-transit and available for your inspection, test drive, and purchase. Not all customers may qualify for all rebates listed, see dealer for details. Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 08/31/2026
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