The 2026 Sierra 1500 AT4 comes standard with the Duramax 3.0-liter Turbo-Diesel engine paired with a 10-speed automatic transmission, offering a strong foundation for hauling and trailering. When properly equipped, the Sierra 1500 can tow up to 13,300 pounds - making it a capable partner for those who frequently haul boats, trailers, or heavy equipment. The available ProGrade Trailering System further streamlines the hitching and towing process, giving you the confidence and control to handle demanding loads with ease.

Step inside the AT4 and you'll find a purposefully designed cabin that blends off-road toughness with genuine comfort. The distinctive Jet Black interior with Kalahari accents sets a bold tone, while heated and ventilated perforated front leather seating surfaces keep you comfortable on long hauls. The Sierra 1500 also delivers best-in-class standard Crew Cab front head- and legroom, so every passenger has room to stretch out. Smart storage solutions throughout the cabin ensure your gear stays organized whether you're heading to a job site or the trailhead.

The 2026 Sierra 1500 AT4 pairs its rugged character with an impressive technology suite. A combined 40 inches diagonal of driver-focused digital displays brings the cockpit to life with crisp visuals and intuitive controls. Up to 14 available camera views help you maneuver through tight spots or manage trailer positioning with precision. The available ProGrade Trailering System integrates seamlessly with the infotainment setup, and available Super Cruise hands-free driver assistance technology is offered on select Sierra 1500 trims for a more relaxed highway experience.

GMC equips the 2026 Sierra 1500 AT4 with a comprehensive suite of driver assistance and collision-avoidance technologies through GMC Pro Safety. These systems work together to help keep you alert and aware on any road condition - whether you're navigating a busy highway or tackling a rocky trail. Available features include front and rear park assist, HD Surround Vision, and Hill Descent Control, which provides a smooth and controlled descent on steep grades. The AT4's underbody skid plates add an extra layer of protection when the terrain gets rough.

The 2026 GMC Sierra 1500 offers eight distinct trim levels to fit a wide range of needs and preferences: Pro, SLE, Elevation, SLT, AT4, AT4X, Denali, and Denali Ultimate. The AT4 stands out as the go-to choice for off-road enthusiasts, featuring a factory-installed 2-inch suspension lift, Rancho monotube shocks, two-speed Autotrac transfer case, and underbody skid plates as standard. For those who want to push even further, the AT4X steps things up with Multimatic DSSV dampers and exclusive front and rear electronic locking differentials - a combination not found on any competitor in its class. Drivers near Lewisburg can explore the full Sierra 1500 lineup to find the right fit for their lifestyle.

The 2026 GMC Sierra 1500 AT4 is a truck that earns its reputation on and off the pavement. With impressive towing capacity, a premium cabin, and cutting-edge technology, it's a well-rounded pickup that's ready to take on whatever comes next. Stop in to learn more and get behind the wheel.