The 2015 Buick LaCrosse is a 4-door, 5-seat Sedan, available in 7 trims, ranging from the Base FWD to the 1SV FWD. Upon introduction, the $33,635 Base FWD is equipped with a standard 2.4L, 4-cylinder, engine that achieves 25-mpg in the city and 36-mpg on the highway. An Automatic transmission is standard. The $31,065 1SV FWD is equipped with a standard 3.6L, 6-cylinder, engine that achieves 18-mpg in the city and 28-mpg on the highway. An Automatic transmission is standard.