2015 Buick Regal 4dr Sdn FWD. 2015 Buick Regal for sale near St. Peters in O'Fallon at Jim Trenary Chevrolet. Leather heated front bucket seats, backup camera, sunroof, 4DR sedan, 2.4L 4-cylinder, 6 speed automatic, FWD, 18" painted alloy wheels, rear split-folding... via AutoRevolution