New York, NY – GMC continues its unveils just ahead of the 2018 New York International Auto Show (NYIAS) with the release of a new off-road Sierra variant that will be called the Sierra AT4.

The AT4, starting out as a 2019 model year truck, will come out later this fall delivering off-road adventure along with the same bold stance, premium interior and latest technology found in the all-new next-generation Sierra, shown off earlier this month in Detroit. 

The premium off-road brand AT4 only starts with Sierra, eventually to work its way into every GMC product over the next two years. 

“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. 

The biggest factor that separates the AT4 from the regular Sierra is its factory-installed two-inch suspension lift for extra ground clearance. More assistance comes from its four-wheel drive setup with a two-speed transfer case and a low-range setting, Hill Descent Control, off-road tuned Rancho monotube shock absorbers and a locking rear differential that aid the AT4 in gaining momentum and traction during tough climbs, steep valleys and various sticky terrain.

To enhance the AT4s off-road excitement, GMC has dressed it in a unique dark finish, perfect to show off in the Gotham city. A rugged grille finished off with black chrome make this Sierra standout, while retaining some GMC qualities through its signature C-shaped LED headlights. To separate this Sierra AT4 further from its regular version, red touches are displayed in key spots, as well as unique vertical tow hooks and AT4 signature emblems that are carried into the inside on its leather seat headrests. The rest of the interior continues that darkened theme on the steering wheel and centre stack.

Continuing the tour of the inside, the AT4 shows off its segment-first 3.7-inch Multi-Colour Head-up Display that includes an off-road inclinometer that assists in fore-and-aft tilt, front tire angle and left-and-right tilt to figure out how steep a grade your transversing. Furthermore, the AT4 has an available bird’s-eye view Surround Vision displayed through the infotainment unit and an all-new ProGrade Trailering system with Trailering App.

Powering the Sierra are updated versions of the 6.2-litre and 5.3-litre V8 engines matched to a 10-speed automatic transmission. Both will feature stop/start technology, as well as a new Dynamic Fuel Management system that can fluctuate from one to eight cylinders for improved fuel efficiency. 

An all-new 3.0-litre inline-six turbodiesel engine will be added to the engine mix and released after the V8s. 

As with the new 2019 Sierra, the AT4 will also feature an available carbon fiber cargo box – the CarbonPro. It will have best-in-class dent, scratch and corrosion resistance. All other boxes featured in most trims will utilize high-strength steel and a bed floor made by a stronger alloy. It will possess best-in-class cargo volume at 1,784 litres on the short box version.

To finish the Sierra's innovative story, a standard industry-first MultiPro Tailgate with six unique functions will be offered up in the AT4 that includes a second-tier loading station and standing workstation to make those stressful jobs and tasks much easier. A 110V outlet can be found in the rear to power up tools and supplies. 

The 2019 GMC Sierra AT4 will be available in the fall of 2018.