This article covers the GM assembly plant built in 1959; for the general history of the Willow Run complex, see the main article. Willow Run Assembly was a General Motors automobile factory near Ypsilanti, Michigan, located at 2625 Tyler Road, in the Willow Run manufacturing complex. Willow Run Assembly consisted of an assembly plant of 2.1 million square feet, another building that was known in later years as Willow Run Company Vehicle Operations, covering 23,000 square feet on 22 acres of land, and perhaps other parcels. Willow Run Assembly was to the south of the former Willow Run Transmission, the site of the bomber plant built by Ford in 1941.