GM Closes Brownstown Battery Plant as Lease Ends, Not Over EV Strategy

General Motors will close its Brownstown Battery Assembly Plant south of Detroit when the site lease expires next summer, a company spokesperson confirmed to TechCrunch and InsideEVs. The 480,000‑square‑foot facility, opened in 2009, assembled high‑voltage battery packs for the Cadillac Celestiq flagship sedan and both battery packs and electric drive units for the Chevrolet Corvette E-Ray plug‑in hybrid. GM said the decision is unrelated to its electric‑vehicle strategy; the lease is simply ending. All employees and production will transfer to other nearby GM facilities.

Why is GM closing the Brownstown plant now?

The closure coincides with a sharp drop in GM’s U.S. EV sales after the federal $7,500 purchase credit was repealed by the One Big Beautiful Bill Act signed in 2025. In the third quarter of 2026 GM delivered 25,472 EVs in the United States, down from 66,501 in the same quarter a year earlier. The Brownstown workforce had already shrunk from roughly 300 people at peak output to fewer than a dozen as production slowed. Affected workers were notified earlier in 2026 and offered positions at other area plants.

What does this mean for GM’s EV lineup and battery research?

GM continues to build the Chevrolet Silverado EV and the limited‑run Chevrolet Bolt. The company is also advancing next‑generation chemistries — lithium‑manganese‑rich and sodium‑ion — and is commissioning a new $900 million facility to accelerate commercialization of those technologies. At the same time, GM has withdrawn from two major battery joint ventures: it exited the Samsung SDI project in Indiana and the $2.5 billion LG Energy Solution plant in Lansing, Michigan.

How does the lease expiration differ from a strategic pullback?

A lease expiration is a contractual endpoint, not a cancellation driven by demand or technology shifts. GM’s statement emphasizes that the Brownstown work — Celestiq packs and Corvette E-Ray drive units — will continue at other sites. The move reflects normal real‑estate management rather than a retreat from electrification, even as the company rebalances toward more gasoline‑powered models in the near term.

Ecoverse analysis

GM’s U.S. EV sales fell from 66,501 in Q3 2025 to 25,472 in Q3 2026. The Brownstown headcount dropped from ~300 to <12. The $900 million commercialization facility and ongoing chemistry research suggest GM is preparing for a post‑tax‑credit product cycle rather than abandoning EVs.

What should readers watch next?

Monitor which GM plants absorb the Brownstown workload and whether Celestiq and Corvette E-Ray volumes rise enough to justify dedicated lines. Also track progress on the lithium‑manganese‑rich and sodium‑ion programs — commercial success there could reshape GM’s battery footprint more than any single plant closure.