GM unveils the AT4 off-road package for the 2019 GMC Sierra

29 March, 2018

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General Motors revealed in Manhattan, ahead of the New York Auto Show 2018, its all-new GMC Sierra AT4, an off-road-focused trim level packed with a number of upgrades to that end, including a 2-inch suspension lift, off-road-tuned Rancho monotube shocks and a standard 4WD system with a two-speed transfer case, a locking rear differential and skid plates.

“The 2019 Sierra AT4 is designed for the customer who wants an elevated presence on the road and the capability to venture off life’s beaten path,” said Duncan Aldred, vice president of Global GMC. “It’s also the beginning for the AT4 brand, which will be seen on every vehicle in our lineup in the next two years.”

The Sierra AT4 comes standard with a factory installed 2-inch suspension lift that provides additional ground clearance and four-wheel drive with a two-speed transfer case that includes low-range four-wheel-drive gearing for extremely tough conditions.

It also includes standard off-road tuned Rancho monotube shock absorbers, a locking rear differential and Hill Descent Control, a driver assistance feature that leverages the anti-lock braking system to enable smooth, controlled descents on steep grades without the driver having to touch the brake pedal under certain conditions. The locking rear differential directs engine power equally to both rear wheels for the greatest traction on slippery or uneven terrain.

As with the 2019 Sierra Denali and SLT debuted earlier this month, the all-new Sierra AT4 also comes standard with the industry-first MultiPro Tailgate, which features six unique functions and positions, offering enhanced second-tier loading and load-stop solutions, a standing workstation mode and easier access to items in the box.

Later in the model year, the 2019 Sierra AT4 will offer an available GMC exclusive and industry-first carbon fiber box — the CarbonPro — developed to increase the truck's durability, efficiency and functionality. It replaces the standard steel inner panels and floor with a lightweight, purpose-designed carbon fiber composite that offers best-in-class dent, scratch and corrosion resistance, making it the most durable pickup box in the segment.

Under the hood, the Sierra AT4 features new versions of the 6.2L and 5.3L V-8 engines along with all-new Duramax 3.0L inline-six turbo-diesel engine. The available 6.2L and 3.0L engines are paired with a 10-speed automatic transmission.

The 5.3L and 6.2L engines feature stop/start technology and new Dynamic Fuel Management that enables the engine to operate on one to eight cylinders, depending on demand, to optimize power and efficiency.

As with other trim levels of the redesigned GMC Sierra and Chevrolet Silverado, will be built at plants in Fort Wayne, Indiana, and Silao, Guanajuato in Mexico. According to Autonews, the redesign and re-engineering of the next Chevrolet Silverado and its sibling the GMC Sierra, are the biggest product program ever undertaken by GM. The company is spending nearly US$ 3 billion just to upgrade the plants that will build those trucks.

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