February 25, 2021 TROY, Mich. â February 23, 2021 â Magna has broken ground on a new manufacturing facility in St. Clair, Mich., that will build complex battery enclosures for the all-new 2022 GMC Hummer EV. Construction of the 345,000 square-foot facility, named Magna Electric Vehicle Structures, represents more than a $70 million investment that is expected to bring more than 300 jobs to the city of St. Clair over the next five years. The battery enclosure contributes to the structural and safety aspects of a vehicleâs frame and protects high-voltage batteries from damage and water. Magna can develop these advanced assemblies in steel, aluminum, and multi-material configurations, including lightweight composites, to meet the individual needs of its customers.