Terrain SLE-1, 4D Sport Utility, 2.4L I4 SIDI DOHC VVT, 6-Speed Automatic, FWD, and Champagne Silver Metallic. Great gas mileage! Talk about MPG! Champion Chevrolet Buick GMC is pleased to offer this good-looking 2013 GMC Terrain. When H2O starts showing up in the weather forecast, the FWD power delivery will help keep you in control of things.