https://www.tflcar.com - Now in its second generation, the GMC Terrain is all new for 2018. While the original model sported a boxier design, this one is made to look longer and sleek. It also features a floating roof design element, while the last generation looked more like a standard SUV. This 2018 GMC Terrain gone down a size class from the previous model, as well. GMC lopped 5.2 inches off the wheelbase, so this car is now classified as a compact crossover. The last Terrain, with a 112.5-inch wheelbase, was technically a midsize. Despite that, the new Terrain is only 4.7 inches shorter than the previous model.