DETROIT — General Motors on Friday said it expects to reopen the remaining three North American assembly plants that have been idled because of the global microchip shortage by Nov. 1.

GM also said it plans to resume building Chevrolet Malibu sedans for the first time in nearly nine months at a plant that has partially reopened in Kansas.

The automaker said its plant in Ramos Arizpe, Mexico, which has been shut since mid-August, would start building Chevy Blazers on Oct. 18 followed by Chevy Equinoxes as soon as Nov. 1.