In 1965, GM introduced entirely new fullsize cars in the Buick, Cadillac, Pontiac, Oldsmobile, and Chevrolet brands. At the time, hard as it is to believe now, GM controlled more than 50 percent of the U.S. new car market. There was even talk of breaking up GM into two or more companies because it was seen that the company had an almost monopolistic control of the domestic marketplace. How quaint that seems today, right?
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