2026 GMC Sierra 2500HD AT4

From the store

Call us at 512-954-9290

This 2026 GMC Sierra 2500HD AT4 delivers the capability and refinement you need for work and life. With its Duramax 6.6L V8 turbodiesel engine producing 470 horsepower and 975 lb-ft of torque, combined with 4WD and a 10-speed automatic transmission, this truck is engineered to handle serious demands while maintaining the comfort expected in today's premium trucks.

- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque

- 4WD with 2-Speed Active Transfer Case and Off-Road Suspension

- AT4 Preferred Package and AT4 Premium Plus Package

- Gooseneck/5th Wheel Prep Package for heavy-duty towing

- X31 Off-Road Package for enhanced terrain capability

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

- Technology Package with Premium GMC Infotainment System

- Apple CarPlay and Android Auto Integration

- Wireless Phone Projection and Wireless Charging

- Multicolor 15-Inch Head-Up Display

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

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

- Power Sunroof and Deep-Tinted Glass

- 20-Inch High Gloss Black Aluminum Wheels

The AT4 trim establishes this Sierra as far more than a work vehicle. Finished in Beige with meticulous attention to detail, the exterior features a gloss black header grille, LED cargo area lighting, LED smoked amber roof marker lamps, and a spray-on bedliner with GMC logo. The interior presents perforated leather-appointed front seats, a floor-mounted center console, and premium floor liners on both levels, creating an environment that balances utility with refinement.

Technology integrates seamlessly into the driving experience. The 15-inch diagonal head-up display keeps critical information visible, while the in-vehicle trailering system app and hitch guidance with hitch view simplify complex towing operations. Rear cross traffic alert, trailer side blind zone alert, and ultrasonic front and rear park assist contribute to confidence in any situation. Universal home remote capability and keyless open and start add practical convenience to daily operation.

Safety features throughout this truck reflect GMC's commitment to occupant protection. Automatic emergency braking, forward collision alert, and front pedestrian braking work proactively. The system includes Buckle to Drive, dual front and side impact airbags, and an occupant sensing system. Lane departure warning and following distance indicator provide real-time awareness on the road. OnStar emergency communication services and a panic alarm round out comprehensive protection.

This Sierra 2500HD AT4 combines the diesel efficiency and torque that serious truck owners demand with the contemporary amenities and technology integration that define modern premium vehicles. The combination of capability, craftsmanship, and comfort makes this truck suited for those who require performance without compromise.

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