Like its Chevrolet Equinox twin, the GMC Terrain straddles the small- and midsized-SUV categories. The Terrain has a taut yet supple and controlled ride, with responsive and secure handling. Both the 3.6-liter V6 and the more fuel-efficient four-cylinder engine feel sluggish and have to work hard. The reluctant transmission blunts the performance of the V6, and its gas mileage is mediocre. Visibility to the side and rear is limited. At least the rear seat is roomy. 2016 models get a standard rearview camera and available blind-spot monitoring and rear cross-traffic alert. Reliability has been above average but the Terrain scored too low for us to recommend.