The Buick brand sells premium versions of General Motors vehicles on the North American markets (US, Canada, Mexico) and in China. It is not present in Europe, although in its lineup you can find rebadged Opel vehicles, such as the Regal (Opel Insignia), Encore (Opel Mokka), or Cascada.
Although it is quintessentially an American brand, Buick sells 80% of its cars in China. In 2015, Buick managed to sell 1,231,941 vehicles, an all-time record for the marque.
Buick is actually the oldest active American brand of automobiles (it was founded in 1899) and was the company that established General Motors in 1908.
General Motors founder William C. Durant had served as Buick's general manager and major investor. Buick also has the distinction of being the first automobile maker in the world to equip its cars with overhead valve engines, something that has been doing since 1904. In 1911, Buick introduced its first closed-body car, four years ahead of Ford. The car was built at the all-new factory in Flint, Michigan, which later became to be known as Buick City. The 1920s saw Buick establishing itself as a premium brand on the market, with a varied lineup of cars. The brand survived the Great Depression in the 1930s and became popular even with the British royal family.
After the 1973 oil crisis, Buick was affected by GM's strategy to cut costs and reduce fuel consumption. The brand's models became mere, slightly upmarket, copies of Chevrolet designs. Revival came after 2000 when Buick enjoyed more and more success in China, and on the American market its lineup was revamped to exclude compact and performance segments to focus on SUV/crossover vehicles.