1969 Buick GS 400 Stage 1 Convertible 4-Speed The late 1960s saw a shift in the American auto industry. Even luxury brands like Buick recognized the growing demand for high-performance cars, especially among younger buyers. But how could a brand known for sedans and luxury capture this market without alienating its core audience? Buick's answer is the 1969 Buick GS 400 Stage 1! This 4-speed convertible blends luxury and performance with a triple-black color scheme (paint, top, and interior). Thi