Trucking Companies In Saginaw, Michigan In 1940 Saginaw, Michigan was a very industrial city in 1940 with 154 factories employing more than 18,200 people. The 7 auto parts plants in the city , with over 9,000 employees,  included the Chevrolet Grey Iron Foundry, Chevrolet Transmission Division, Saginaw Malleable Iron Division and Saginaw Steering Gear. Other… Continue reading Saginaw, Michigan Trucking Companies in 1940