The GM C Platform was a rear wheel drive (RWD) automobile chassis used by General Motors for its full-sized cars from 1925 through 1984. From at least 1941, when the B-body followed suit in adopting the C-body's pioneering lower and wider bodystyle, abandoning running boards, it may be viewed as a larger and more upscale brother to the GM B platform. It was also related to the limousine D platform.