There is only one engine available on the Enclave, but it's a powerful 3.6L V6 producing 288 horsepower. The engine is mated to a 6-speed automatic, a combination yielding enough grunt to tow up to 4,500lbs. Despite its size and powerful engine, the Enclave still manages to return decent fuel economy and is rated at 17 mpg city and 24 mpg highway in front-wheel-drive trim. The Enclave is offered in three different trims: Convenience, Leather and Premium. All trims are available in both front and all-wheel-drive configurations, with all-wheel-drive costing about $2000 more. Being a luxury vehicle, even the most basic trim level comes packed full of interesting features. All Enclaves get Buick's excellent IntelliLink infotainment system featuring Bluetooth, a 6-inch color screen, steering wheel controls, satellite radio, voice recognition and plenty of connectivity to various electronic devices. Other standard features include OnStar, tri-zone automatic climate control, a powered rear lift gate, 18-inch wheels, an 8-way power adjustable driver's seat, a leather and wood trimmed steering wheel and a rear view camera system. The Leather package includes leather seating surfaces, but also adds heated front seats, an 8-way power adjustable front passenger seat, memory pre-sets for the driver's seat, 19-inch wheels and Buick's Side Blind Zone Alert system which helps avoid accidents when backing out of parking spots or when changing lanes. The Premium package offers chrome 19-inch wheels, swiveling headlights to help see around corners, power folding exterior mirrors, cooling and heating for the front seats, a power tilting and telescoping steering column, a Bose 10-speaker stereo system and a forward collision alert and lane departure system. Other optional items include a navigation system, a rear seat entertainment system and seating for eight, rather than seven people. Buick takes safety seriously and in addition to anti-lock brakes, traction control and stability control, all Enclaves come equipped with panic break assist, seven airbags and a rear view camera.