Unaware of the magnitude of importance placed upon Ford at the Ford Motor Company and Chevrolet at General Motors? Of the 328,325 vehicles sold by traditional American brands in the United States last month, almost a third were Chevrolets. Just over 30% were branded with the Blue Oval. Compare that with 3.5% of the U.S. American car market devoted to a high-profile brand like Cadillac in September. Want the whole picture? Inspect the Graph with detailed Sales Stats below – clickable for a larger view.