"GM "is the abbreviation of the name of American General Motors Corporation, which is taken from the first capital letter of the first two words of the English full name of General Motors Corporation. The trademarks of all models adopt the logo of the company's subordinate divisions. On September 16th, 192, William Durant clearly established the early General Motors Company, headquartered in Detroit, Michigan, USA. After William Dutland's efforts, he joined or merged Buick, Cadillac, chevrolet, Oldsmobile, Oakland, Pontiac, Hughes and EDS Computer, and established the American General Motors Company, making the original car companies become branches of the company, thus making the company's subordinate branches reach more than 3. Among them, the well-known branches are: Buick Branch, Oldsmobile Branch, Pontiac Branch, chevrolet Branch, Cadillac Branch, etc.