From the beginning.
GM was founded in September 16,1908. In 1909 GM sells over 25,000 vehicles
Durant brings back the Buick,Olds, Pontiac, Cadillac, Champion ignition, an AC spark plugs
William Durant's Bio
William C. Durant established a carriage company in 1886 and joined the new but failing Buick Motor Car Co. in 1903–04, quickly reviving it. In 1908, he brought together several automotive manufacturers to form the General Motors Company. He lost control of the company two years later, but with Louis Chevrolet he founded the Chevrolet Motor Co., which acquired control of General Motors in 1915.