Remove ImagesNews brief GM Orion plant fires up August 03, 2011 GM began initial production of its highly anticipated Chevrolet Sonic at its Orion Assembly Plant on Monday. The plant had been closed for 18 months for updates and retooling to accommodate production of the subcompact vehicle. Orion Assembly also will produce the Buick Verano subcompact, has 1,750 workers, including 1,600 hourly employees. |