New for 2007, the Acadia is a four-door, up-to-eight-passenger cross-over SUV. There are three trim levels – the SLE1, SLT1 and SLT2. All are available with front-wheel-drive or all-wheel-drive configuration. The drive-train is a 3.6-liter V6 that produces 275 horsepower, linked to a six-speed automatic transmission.