It was among the first American marques of automobiles and was the company that established General Motors in 1908. Buick became known for its high-quality engineering and luxurious features, positioning itself as an upscale luxury car below Cadillac in the North American market. Throughout the years, Buick has introduced several innovations, such as the first closed-body car in 1911, and the pioneering use of overhead valves in their engines in 1904. In 2017, Buick sold over 1.4 million vehicles worldwide, with its largest market being Mainland China. Despite its success, Buick's US market share has decreased in recent years.