Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Y platform, or Y body, designation has been used twice by the General Motors Corporation to describe a series of vehicles all built on the same basic body and sharing many parts and characteristics. The first was for a group of entry-level compacts including the rear-engine Chevrolet Corvair from 1960 to 1964 and conventional front-engine compacts built by GM divisions Buick, Oldsmobile and Pontiac from 1961 to 1963. The second, and current, incarnation is used for a high-end rear-wheel drive automobile platform from the 1980s through the 2000s.