This 2026 GMC Sierra 2500HD AT4 in Gray represents a premium heavy-duty truck built for those who demand capability and refinement. Equipped with the powerful Duramax 6.6L V8 Turbodiesel engine paired with a 10-Speed Automatic transmission and 4WD, this truck delivers the performance you need for work or adventure.
- Apple CarPlay and Android Auto integration
- Duramax 6.6L V8 Turbodiesel with 10-Speed Automatic and 4WD
- AT4 Preferred Package and AT4 Premium Plus Package
- X31 Off-Road Package with 2-Speed Active Transfer Case
- Gooseneck/5th Wheel Prep Package for serious towing capability
- Technology Package with Multicolor 15 Head-Up Display
- Bose Premium 7-Speaker Sound System with SiriusXM 360L Trial
- Power Sunroof
- HD Surround Vision with Bed View Camera and Trailer Cameras
- Wireless Charging and Wireless Phone Projection
- Heated and Ventilated Front Seats with 10-Way Power Adjusters
- Spray-on Pickup Bedliner with GMC Logo
- Ultrasonic Front and Rear Park Assist
- Trailer Side Blind Zone Alert and Trailer Cam Provisions
- Remote Vehicle Starter System
Vehicle Detailed
This truck has been thoroughly serviced, inspected, and fully detailed to ensure it meets our quality standards. The comprehensive preparation guarantees you're receiving a well-maintained vehicle ready for immediate use.
The AT4 badge on this Sierra signifies more than capability it represents a commitment to sophisticated performance and premium comfort. The truck combines rugged construction with refined interior design, featuring perforated leather-appointed front seats, heated steering wheel, and dual-zone automatic temperature control. The 20-inch high-gloss black aluminum wheels and gloss black header grille reinforce the AT4's distinctive appearance.
Technology integration is seamless with the Premium GMC Infotainment System, steering wheel audio controls, and multiple charging options throughout the cabin. The truck accommodates modern connectivity through USB ports, wireless charging, and smartphone projection, keeping you connected during every journey. The multicolor head-up display keeps essential information directly in your line of sight.
Safety and utility merge through advanced features including Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, and Lane Departure Warning. The HD Surround Vision system and parking assist technologies simplify maneuvering in tight spaces. For those requiring trailer capability, the gooseneck/5th wheel preparation and trailer camera provisions demonstrate this truck's readiness for serious hauling responsibilities.
This 2026 Sierra 2500HD AT4 stands ready to handle whatever you require from a premium heavy-duty truck. Visit our showroom to explore this vehicle firsthand and discover why discerning buyers choose the Sierra platform.




