Information is available about the gmc terrain, including its specs, prices, mpg, reviews, and photos, for various model years. However, the specific model year being referenced is unclear, with different outlets reporting on different years, including 2022, 2019, 2018, and 2016, as well as future models. The gmc terrain is being compared to other vehicles, such as the gmc acadia and gmc yukon xl, and some outlets are reviewing specific trim levels, like the at4.