WARREN, Mich. Three weeks ago, the Big Three automakers in Metro Detroit -- Ford, General Motors and Fiat Chrysler -- reopened their parts and assembly plants. Auto workers are trying to tread carefully and avoid spreading COVID-19. The Warren Truck Plant continues working two shifts per day, and the new protocols have caused many changes. While everyone is trying to get their feet under them, the industry as a whole appears to be ready for a comeback. Meanwhile, for car and truck buyers, the shutdown caused inventory shortages, so dealers are doing what they can to deal with that issues.