General Motors will cut production of its slow-selling Saturn L Series by about 40% in June and lay off some workers at the Wilmington, Delaware, plant that builds the mid-size car, Reuters said. GM will stop work at the Delaware plant for four weeks from May 12, resulting in temporary layoffs for about 2,100 of the facility's 2,270 workers, Saturn spokeswoman Sherrie Childers Arb told Reuters.