GM to close Brownstown battery assembly plant as lease ends, moves work elsewhere

General Motors has told TechCrunch it will close the Brownstown Battery Assembly Plant south of Detroit, the facility that assembled battery packs for the Cadillac Celestiq and both battery packs and electric drive units for the Chevrolet Corvette E-Ray. The company attributed the decision to the plant’s lease nearing its end rather than to production or model changes.

GM said employees and the work performed at Brownstown will be transferred to other GM facilities, but the automaker did not specify which plants will take on the operations or provide a timeline for the moves. No further details on the disposition of the Brownstown site were disclosed.

For Michigan enthusiasts, the closure is notable because Brownstown had been handling high-profile EV and electrified sports-car hardware tied to marquee nameplates. The relocation of that work will affect local supply-chain and employment dynamics, though GM’s statement frames this as a logistical shift tied to real estate rather than product strategy.

Next steps remain unclear: GM’s identification of receiving facilities, schedules for employee transitions, and any community or workforce support measures have not been announced.