GM sales plummet in December

General Motors dealers in the United States delivered 221,983 vehicles in December, down 31 percent compared with a year ago. However, total deliveries were 67,000 vehicles more than November's result, up more than 43 percent month over month. GM December car sales of 87,506 were off 25 percent and truck sales of 134,477 were down 35 percent compared with a year ago.