A major General Motors parts supplier is on strike.
Members of United Auto Workers local 699 walked off the job at Nexteer in Saginaw County just after midnight.
Nexteer supplies steering and driveline systems to General Motors. It also supplies parts to Ford, Fiat Chrysler and Toyota.
The union rejected a tentative contract on Sunday, voting 3108 to 80 against the deal.
Union leaders say they are striking over wages and benefits. The company say the rejected contract offered “stability”.