Too bad the previous "answerers" have no idea about the topic. Why is it they see fit to spout their ill-informed opinions?
GM has and is closing foreign plants. "GM announced in June that it would idle pickup and SUV factories in Janesville, Wis.; Oshawa, Ontario; Moraine, Ohio; and Toluca, Mexico"
http://findarticles.com/p/articles/mi_qa5375/is_200809/ai_n29493476
Ford has closed foreign plants and is further cutting back employment at others.
http://www.cbc.ca/news/yourview/2006/09/ford_to_close_ontario_plant_cu.html
http://www.toledoblade.com/apps/pbcs.dll/article?AID=/20080911/BUSINESS02/809110283
They have been enticed by foreign governments to reopen closed plants.
http://www.thestar.com/Business/article/407030