Disclaimer: The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.
1Dealer Discount applied to everyone
Excludes $899 Document Fee and $98 Electronic Document Fee.
This 2026 GMC Sierra 2500HD AT4 is a powerful diesel workhorse finished in gray with a jet black interior accented by Kalahari touches. With its 6.6L turbocharged diesel engine, 10-speed automatic transmission, and four-wheel drive, this crew cab standard bed truck is built for hauling and serious capability. The AT4 trim brings premium comfort and advanced off-road technology to a truck designed for those who demand performance and refinement.
- 6.6L V8 Diesel Turbocharged Engine with Engine Block Heater
- 220-Amp Alternator for Heavy-Duty Power Management
- X31 Off-Road Package with 2-Speed Active Transfer Case and Hill Descent Control
- Premium Bose 7-Speaker Audio System with SiriusXM 360L and Apple CarPlay/Android Auto
- Heated and Ventilated Leather Front Seats with 10-Way Power Adjustment
- Spray-On Pickup Bedliner with GMC Logo and LED Cargo Area Lighting
- Advanced Safety: Automatic Emergency Braking, Blind Zone Alert, and HD Surround Vision
- Wireless Charging and Wireless Phone Projection
- Ultrasonic Front and Rear Park Assist with Bed View Camera
- Remote Vehicle Starter and Keyless Entry/Start System
This AT4 combines capability with comfort, offering trailer guidance technology, heated rear seats, and an integrated trailering system app for confidence on any road. Schedule a visit to experience the Sierra 2500HD's combination of diesel performance and premium features firsthand.