2026 GMC Sierra 2500HD AT4

From the store

Call us at 512-954-9290

- 6.6L V8 Diesel Turbocharged Duramax engine with 470 hp and 975 lb-ft of torque

- 10-Speed Automatic transmission with 4WD

- AT4 Preferred Package and AT4 Premium Plus Package

- Gooseneck/5th Wheel Prep Package for serious towing capability

- X31 Off-Road Package with Hill Descent Control and 2-Speed Active Transfer Case

- Technology Package with advanced connectivity and navigation

- Bose Premium 7-Speaker Sound System with SiriusXM 360L Trial Subscription

- Spray-on Pickup Bedliner with GMC Logo

- HD Surround Vision with Bed View Camera and Two Trailer Camera Provisions

- Multicolor 15" Diagonal Head-Up Display

- Heated and Ventilated Leather Front Seats with 10-Way Power Adjustment

- Power Sunroof and Deep-Tinted Glass

- Wireless Phone Projection and Charging

- Ultrasonic Front and Rear Park Assist

- 20" High Gloss Black Aluminum Wheels

The 2026 Sierra 2500HD AT4 arrives with the legendary Duramax 6.6L V8 Turbodiesel engine, delivering the power and torque necessary for serious work and adventure. With 470 horsepower and 975 pound-feet of torque, this truck handles demanding tasks while maintaining the refined capability you expect from GMC. The 10-speed automatic transmission paired with 4WD ensures smooth performance across all driving conditions.

The AT4 designation signals genuine off-road engineering. The X31 Off-Road Package includes a sophisticated suspension system, Hill Descent Control, and a 2-Speed Active Transfer Case that adapts to your terrain. Whether you're navigating challenging landscapes or managing highway miles, this truck responds with confidence and control.

For those who tow and haul, the Gooseneck/5th Wheel Prep Package provides the structural foundation for serious trailering work. The in-vehicle Trailering System App, Hitch Guidance with Hitch View, and trailer camera provisions make connecting and monitoring your load straightforward and secure.

Inside, the cabin reflects GMC's commitment to comfort and technology. Heated and ventilated leather front seats with 10-way power adjustment provide personalized comfort for long drives. A power sunroof and deep-tinted glass create an open, refined atmosphere. The Bose Premium 7-Speaker Sound System, Wireless Phone Projection, and Wireless Charging keep you connected without distraction.

The technology suite delivers capability at your fingertips. The multicolor 15" diagonal head-up display projects critical information directly into your sightline. HD Surround Vision with a bed view camera and trailer camera provisions provides comprehensive visibility for precise maneuvering. Ultrasonic front and rear park assist makes parking effortless.

This 2026 Sierra 2500HD AT4 represents serious capability married to genuine refinement. The combination of turbodiesel power, advanced all-terrain engineering, towing readiness, and premium interior appointments creates a truck built for those who demand both performance and sophistication from their investment.

Call us at 512-954-9290 Price includes: $2000 - GMC Bonus Cash. Exp. 11/30/2026 $2500 - Buick & GMC Consumer Cash Program. Exp. 11/30/2026