 For 1988, all GM G-body vehicles were downsized slightly and replaced by the front-wheel drive GM10 platform (later the GM W platform), which also was phased in as the replacement for Chevrolet and Pontiac variants of A-platform vehicles.The downsizing of the General Motors X-platform compact vehicles for 1980 also coincided with the transition of GM to front-wheel drive.Although the company had produced front-wheel drive vehicles since 1966, the 1980 X-cars were the first front-wheel drive GM vehicles outside of the luxury car segment.