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Authentic Off-Road Capability

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.

The Sierra AT4 boasts innovative technologies that optimize capability and elevate driver confidence.

• Traction Select System allows the driver to choose from preset drive modes that have been tailored for different terrain or weather conditions. Selecting one of these modes adjusts Sierra’s transmission shift points, throttle mapping and StabiliTrak to optimize performance for the situation at hand.
• Segment-first Multi-Color Head-Up Display projects key, customizable vehicle data, including an off-road inclinometer, on the windshield in a 3×7-inch display. The off-road inclinometer shows the fore-and-aft tilt, front tire angle and left-and-right tilt.
• Surround Vision is available on Sierra AT4 and provides the driver with a bird’s-eye view through an overhead image on the infotainment screen. It can prove useful when slowly maneuvering in tight quarters, be it within a parking garage or out on a challenging trail.
• All-new ProGrade Trailering System with Trailering App offers a connected, comprehensive suite of trailering technology that brings more confidence to the towing experience than ever before in a Sierra.

Groundbreaking Cargo Box Capability and Materials

Debuting first on the 2019 Sierra Denali and SLT, the all-new Sierra AT4 also comes standard with the industry-first MultiPro Tailgate — the segment’s most innovative tailgate ever. The MultiPro Tailgate 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.

‘The 2019 Sierra is the boldest expression ever for GMC’s full-size pickup, and the new AT4 reinforces its essence of capability with distinctive, athletic cues.’

The CarbonPro box combined with our MultiPro Tailgate makes the task of loading and unloading objects such as motorcycles or quads much easier than ever before. The CarbonPro box was designed specifically with three molded in wheel indents in the front bulkhead of the box to locate and secure the front tires. Thanks to added tie-down hooks located in the corners and center bulkhead, and new centralized LED lighting, the task of loading and securing motorcycles and bikes has never been easier. A 110V outlet in the rear routes power to the tools and supplies needed for a day at the track or on the trails.

When it comes to the space and storage vital to truck customers, the 2019 Sierra AT4 delivers innovative solutions. The cargo boxes offer best-in-class cargo volume of 63 cubic feet (1,784 liters) on the short box and continues to be made of roll-formed, high-strength steel, yet a revised alloy offers 50 percent more strength than the current model.
Available GearOn accessory rails within the box allow for bike racks, kayak carriers and other accessories to be installed or adjusted quickly and easily. The rails’ integrated position makes cargo more accessible and frees up space in the rest of the box.

The rear seat backs open to reveal two 10-liter rectangular storage spaces large enough for tablets, tie-down cords or other personal accessories, as well as a large 24-liter storage tray under the second-row seat that can secure all your gear while you’re on the go.