General Motors is closing its Brownstown Battery Assembly Plant south of Detroit, Michigan. According to Automotive News, as cited by InsideEVs, the facility will be decommissioned by next summer, when its lease ends. GM says production will move to other nearby facilities, and a spokesperson told TechCrunch the closure is reportedly unrelated to its EV strategy.
What did the Brownstown plant build?
The plant is a 480,000-square-foot facility that opened in 2009. It assembled high-voltage batteries for the Cadillac Celestiq, Cadillac’s electric luxury model, along with batteries and drive units (the motor assemblies) for the Chevrolet Corvette E-Ray, a plug-in hybrid sports car.
GM told InsideEVs the work will shift to “other nearby GM facilities.” Employment peaked near 300 and is now below a dozen after output was cut because demand came in weaker than expected. Affected workers were notified earlier this year and offered jobs at other area plants.
Why is GM closing it now?
The stated reason is the lease, which is about to expire. Still, the context matters. The plant was already close to empty, and in our read, low-volume models like the Celestiq and the E-Ray can’t support a big battery line.
The backdrop is a pullback in US EV demand. The $7,500 federal EV purchase credit ended in September 2025, and battery-electric sales fell. By InsideEVs’ numbers, GM’s US EV sales in the third quarter dropped to 25,472 from 66,501 a year earlier. Part of that gap reflects buyers who rushed in before the credit expired, but GM’s sales haven’t bounced back.
Put simply, this is a small plant at the tail end of a bigger shift. A facility that once needed close to 300 people ended up with fewer than a dozen, which is the kind of number that tells you production had already dried up well before the lease did. Closing the building is mostly paperwork at that point, and the real decisions happened earlier, when GM trimmed output.
What else has GM scaled back?
Electrive and InsideEVs list a string of adjustments:
- Chevrolet Bolt output is now expected to reach about 35,000 vehicles instead of the planned 150,000 before the model ends in Q1 2027, according to Reuters.
- Reuters also reports $10.9 billion in EV-related charges since Q2 2025.
- Several plants have shifted toward gas-powered vehicles, though GM still builds around a dozen EV models.
- Earlier this year GM exited a battery joint venture with Samsung SDI, leaving Samsung in full control of a planned Indiana plant. In 2024 it withdrew from a $2.5 billion battery plant in Lansing, Michigan, which LG Energy Solution now leads.
- GM’s Detroit hydrogen fuel cell plant has also been shut down, and the company is weighing other uses for the building.
What does it mean if you’re shopping for an EV?
For most buyers, nothing changes at the dealership. The closure involves two low-volume models, and the sources only say the work moves elsewhere inside GM. If you’re considering a Celestiq or an E-Ray, ask the dealer about battery warranty terms and parts availability, as you would with any low-volume car.
The bigger takeaway is how the market has cooled without the federal incentive. Automakers that planned for rapid growth are cutting capacity, and that affects pricing, model availability and how many new EV launches you’ll see. For more on where US demand stands, read our look at US EV sales in Q3 2026.
If you’re still deciding whether an electric car fits your budget, our guide on whether electric cars are worth it covers what to check before you buy.
