GM supplier plans new factory, 390 jobs in Macomb County

GM supplier plans new factory, 390 jobs in Macomb County Spanish automotive supplier Gestamp is planning to build a 460,000-square-foot plant in Macomb County that would employ 390 workers and feed parts to General Motors Co.’s Orion Assembly factory. The company, whose North American headquarters is in Troy, would occupy the build-to-suit development on a…