General Motors Corp will idle six of itscar assembly plants next week, temporarily laying off 21,600
workers, according to spokespersons for the company's groups.
    The automaker will shut three plants each in its two
groups--the Buick-Oldsmobile-Cadillac group and the
Chevrolet-Pontiac-GM of Canada group.
    The plants will be closed for a week starting April six for
inventory adjustment.
    Five of the plants are located in the United States. The
sixth is in Canada. - corrects the date of the plant closings.
