The 2026 GMC Terrain combines smart performance with everyday comfort. At its heart sits a 1.5-liter turbocharged four-cylinder engine that generates 175 horsepower. This turbocharged setup provides quick response when you press the gas pedal. The engine uses direct fuel injection technology to help you save gas while still giving you the acceleration you want for highway merging and passing.
Drivers in O'Fallon can choose between two transmission options on the Elevation trim. The 8-speed automatic transmission shifts smoothly through gears, making your daily drive feel effortless. For even better fuel economy, select the CVT transmission that constantly adjusts for optimal performance. The AT4 trim comes standard with the 8-speed automatic for confident driving on any terrain.
Choose between front-wheel drive (FWD) for better fuel economy or all-wheel drive (AWD) for added traction. With FWD and the CVT, you'll get up to 27 MPG combined. The AWD setup delivers steady handling in various weather conditions while still achieving 25 MPG combined. Check out our new GMC Terrain inventory at O'Fallon Buick GMC today.