The 2026 GMC Sierra HD Denali Ultimate takes this heavy-duty truck to the next level with significant upgrades in luxury, technology, and capability. As the most advanced Sierra HD the brand has ever made, the 2026 model delivers an unrivaled driving experience for Montana truck buyers who demand the very best.
The exterior of the 2026 Sierra HD Denali Ultimate features a striking new front fascia design with an exclusive grille and revised lighting elements for a bold, distinctive presence on the road. Inside the spacious cabin, premium leather surfaces and open-pore wood trim create a refined atmosphere. The redesigned front seats offer enhanced comfort for long drives.
A large 13.4-inch touchscreen with wireless Apple CarPlay® and Android Auto™ anchors the new instrument panel. The latest GMC infotainment system provides intuitive access to connectivity features, while a powerful premium audio system delivers concert-quality sound. Advanced driver assist and trailering technologies, including Super Cruise hands-free driving, provide confidence.
The proven GMC Duramax diesel engine and Allison transmission supply ample power and torque for any towing or hauling needs. An enhanced, stronger frame and suspension enable even greater capability and a smoother ride, both when towing heavy loads or riding empty.
To experience the luxury and capability of the 2026 GMC Sierra HD Denali Ultimate for yourself, visit Lithia Chevrolet GMC of Helena and let one of our knowledgeable sales team members put you behind the wheel of the right heavy-duty truck.