So you’re thinking about a compact crossover but you’re also thinking diesel. Well, the all-new GMC Terrain is offering just that. The Terrain has been a huge hit for GMC since it debuted in 2009 and now, almost a decade later; it’s been reborn as a smaller version of itself. Much like the Acadia before it, GMC has downsized the Terrain to better slot it against other small SUVs like the VW Tiguan and Mazda CX-5 instead of bigger ones like the Ford Edge and Nissan Murano. Over 3” shorter and about 200 pounds lighter, this Terrain presents significantly reduced passenger volume and a little less cargo room.