A person familiar with General Motors' plans says the automaker will permanently close nine more plants and idle three others to trim production and labor costs under bankruptcy protection.
Michigan plants affected include an assembly plant in Pontiac that will close this year. Powertrain plants in Livonia, Flint and Ypsilanti Township will close in 2010.
Also an assembly plant Wilmington, Del., will close this year, while plants in Spring Hill, Tenn., and Orion will shut down production but remain on standby.
The person spoke on condition of anonymity because the plans have not been made public.
A union spokesman at the GM plant in Spring Hill confirms the 2,500 employees there have been told the plant will be idled.
Powertrain plants in Parma, Ohio, and Fredericksburg, Va., also will close in 2010.
Stamping plants in Indianapolis and Mansfield, Ohio, also will close. A stamping plant in Pontiac will remain on standby.