DETROIT — In a normal month before the pandemic, Con Paulos' Chevy dealership in Jerome, Idaho, sold around 40 new vehicles. In September, it was only six. Now he's got nothing new in stock, and every car, truck or…

3M Co. expects the semiconductor shortage that has idled auto factories worldwide will last into 2022 and the company has doubled its previous estimate for the decline in new-vehicle production in this year’s second half. The year-over-year drop will be…