Greg Cavanaugh, automotive writer for the Gallup Journey Magazine, evaluates the features of the 2013 GMC Terrain Denali. This video supplements the .\rbr\rbrThis video is about 2013 GMC TERRAIN DENALI.\rbr\rbr ) The 2013 GMC Terrain Denali AWD is a boxy family hauling crossover that can be had with as much chrome accents as you want.\rbr\rbr2013 GMC Terrain Denali AWD Review.\rbr\rbr2013 GMC Terrain Denali - Impressions.