GMC is completing its pioneering move into the premium off-road space by making AT4 available across its entire retail lineup in 2020. With the addition of the first-ever 2022 Terrain AT4, Canyon AT4 and 2021 Yukon AT4, GMC is poised to double its AT4 offerings and strengthen its market position as the only premium truck and SUV lineup that’s made to be used both on- and off-road.