Unlike other websites and magazines, our ratings are not based solely on a singular road test, but rather a more encompassing batch of criteria: quality, safety, comfort, performance, fuel economy, reliability history and value. When comparing vehicles using our Rating System, it's important to note that the rating earned by each vehicle correlates only to the models within its class. For example, a compact car cannot be compared to a SUV—They are different vehicles altogether.
You can interpret our ratings in the following way:
5-Star: Outstanding vehicle. Only the most exceptional vehicles achieve this rating.
4-Star: Very Good vehicle. Very good and close to being the best vehicle in its class.
3-Star: Good vehicle. Decent, but not quite the best. Often affordable, but lacking key features found in vehicles of the same class.
2-Star: Below average vehicle. Not recommended, and lacking attributes a car buyer would come to expect for the price.
1-Star: Poor vehicle. Simply does not deserve to be on the road.
2018 GMC Terrain OVERVIEW
The 2018 GMC Terrain enters its second generation with big shoes to fill, following the sales success of a model that debuted way back in 2010. This full-scale redesign changes everything about the Terrain, most notably its engines and exterior design. The result is an expressive family vehicle that's completely up with the times.
What's New for 2018
The 2018 Terrain is a full-scale redesign.
Choosing Your GMC Terrain
The Terrain has always been on the larger end of the compact crossover class, so it's no surprise the 2018 model feels substantial, with ample room for five passengers and a stress-free ride. Cargo space is virtually unchanged at 63.5 cubic feet with the rear seat down, and yet the Terrain is three inches shorter and 400 pounds light than before. The familiar boxy shape is gone, replaced by fluid lines and well-placed styling flourishes that add up to a totally different visual theme.
The Terrain shares its engine lineup with its fraternal twin, the Chevrolet Equinox. The base engine is a turbocharged 1.5-liter four-cylinder with 170 horsepower and 203 ft-lb of torque. The optional 2.0-liter four cylinder turbo raises the bar to 252 hp and 260 lb-ft or torque. Both engines come with a nine-speed automatic transmission, and can be paired with all-wheel drive in place of the standard front-drive setup. Models equipped with the 2.0-liter and all-wheel drive are rated to tow up to 3,500 pounds.
The 1.5-liter is EPA-rated at 26 miles per gallon city and 30 mpg highway, for a combined rating of 28 mpg – moving to all-wheel drive sacrifices two mpg across the board. The 2.0-liter achieves an estimated 22 mpg city, 28 mpg highway, and 24 mpg combined with front drive or 21 city, 26 highway, and 23 combined with all-wheel drive.
For maximum efficiency, GMC offers a 1.6-liter turbodiesel four-cylinder that makes 137 hp and 240 lb-ft of torque and works alongside a six-speed automatic. So equipped, the Terrain is rated at 28 mpg in the city, an impressive 39 mpg on the interstate, and 32 mpg combined. Going to all-wheel drive only costs one mile per gallon on the freeway, making it an easy choice for diesel customers.
The Terrain carries more equipment this year at each trim level:
Grab the diesel engine if your commute involves a lot of highway driving, while the SLT trim with the Driver Alert Package I. Pass on any package that adds navigation – standard Apple CarPlay and Android Auto make it obsolete.