Chevrolet, Buick, GMC and Cadillac Drive First GM Sales Increase in 21 Months

A strong performance by GM's four core brands -- Chevrolet, Buick, GMC, and Cadillac -- resulted in GM U.S. October sales of 177,603 vehicles, up 4 percent from last October, the company's first year-over-year gain since January 2008.