Another reason it's unclear whether Tesla will be able to produce vehicles -- even if Alameda allows the company to reopen in Fremont -- is that its suppliers in other states aren't able to operate yet. In Michigan, Governor Gretchen Whitmer issued a separate announcement Thursday giving manufacturers the green light to reopen beginning May 11. That clears the way for parts suppliers to support General Motors Co., Ford Motor Co. and Fiat Chrysler Automobiles NV's plans to restart their North American plants on May 18.