Conquer the Road with Confidence: Discover the 2026 GMC Sierra 3500HD AT4, Your Ultimate Companion for Power, Performance, and Precision in Every Drive.

The 2026 GMC Sierra 3500HD AT4 is engineered for those who demand more from their trucks. With its formidable 6.6L Duramax Turbo-Diesel V8 engine, delivering 470 horsepower and a staggering 975 lb-ft of torque, this powerhouse is ready to tackle any challenge. The advanced 10-speed automatic transmission ensures smooth gear transitions, while the locking/limited slip differential provides exceptional traction on any terrain.

Inside, the Sierra 3500HD AT4 offers a blend of luxury and technology. The AT4 Premium Plus Package includes a power sunroof and a 15" diagonal head-up display, keeping you informed without taking your eyes off the road. The heated and cooled leather seats, complete with memory settings, ensure comfort in any climate. The rear camera mirror provides a clear view of what's behind, enhancing safety and convenience.

For those who tow, the Gooseneck/5th Wheel Prep Package is a game-changer, offering seamless integration for heavy-duty hauling. The integrated tailgate step and running boards make accessing the bed a breeze. This truck isn't just a vehicle; it's a statement of strength and sophistication.