2019 GMC Sierra AT4 – Ford Raptor’s Challenger?. GMC redefines the off-road space by introducing the all-new 2019 Sierra AT4. For the first time ever, the Sierra AT4 delivers a unique formula of authentic off-road capability and innovative technology paired with premium refinement and a bold appearance expected from GMC.
2019 GMC 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.
Sierra AT4 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.
Sierra AT4 features new versions of the proven 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.
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