What a difference mass production made to the business of building cars that were inexpensive, well built and quickly delivered to the public. Henry Ford pioneered mass production of cars with the Model T Ford. With time, the process became highly developed, and by the 1930s it had spread rapidly across the auto industry, revolutionizing it forever. See all this for yourself at this 'modern' 1936 Chevrolet Plant in Flint, Michigan, typical of the General Motors plants for Chevrolet, Pontiac, Oldsmobile, Buick, LaSalle and Cadillac in the mid 1930s until the conversion to World War II military production.