It look like the surge in Michigan is also impacting production at one of Stellantis' assembly plants outside of Detroit.
Not only did they fall short of their production goals, but according to a report in Bloomberg, 630 workers either tested positive for COVID-19 or are under quarantine.
https://www.freep.com/story/money/cars/chrysler/2021/04/16/ram-truck-plant-sterling-heights-covid-19-surge-production/7255441002/