General Motors Corp. and Ford Motor Co. will idle plants beginning March 18 for inventory control.

Among the GM facilities to be down all next week are Hamtramck and Orion Township, MI; and Oshawa, Ont., No.2, affecting nearly 9,000 workers.

Ford will idle its Avon Lake, OH, Mercury Villager/Nissan Quest facility. Some 760 workers are affected.

Meanwhile, New United Motor Mfg. Inc.’s Fremont, CA, assembly plant is scheduled for overtime Saturday, March 23, on its first shift car line only. Both car shifts will work overtime Saturday, April 6. Both shifts on the car and truck lines will work an extra day Saturday, April 13.