GM August U.S. sales: -20.2% to 246,479 vehicles. Pontiac +23.3% to 29,921 units; Chevrolet...

|By:, SA News Editor
GM August U.S. sales: -20.2% to 246,479 vehicles. Pontiac +23.3% to 29,921 units; Chevrolet -9.2% to 168.130. Cadillac -55% to 6,931. Buick -51.7% to 8,612. (MW)