GMC Sierra AT4
The 2019 GMC Sierra AT4 is the first offering from an all-new sub-brand from GMC. AT4, which stands for All Terrain 4, is all about off-road ability and attitude without sacrificing the premium features and technology you expect from GMC. These are trucks for the driver who wants to go off the beaten path in a full-size pickup truck but wants to do it in pebbled leather seats with a full-color head-up display.