[lack of core: GM and Stellantis extend shutdown time] according to foreign media reports, GM said on Sept. 16 that it was extending the downtime at its eight crossover plants in North America as global chips and parts shortages persisted, but that production of lucrative full-size pick-up trucks and SUV plants would continue. Stellantis also said its minivan plant in Windsor, Ontario, Canada, would stop production for a week from Sept. 27 due to a lack of cores.