The 1936–1937 Flint sit-down strike, also known as the General Motors sit-down strike, or the great GM sit-down strike, was a sitdown strike at the General Motors plant in Flint, Michigan, United States. It changed the United Automobile Workers (UAW) from a collection of isolated local unions on the fringes of the industry into a major labor union and led to the unionization of the American automobile industry.