General Motors Corporation, also known as GM, an American multinational corporation, is the world's largest auto company since 1931. However, it ranks second behind Toyota in net worth, revenue and profit.

Founded in 1908, in Flint, Michigan, GM employs approximately 284,000 people around the world. With global headquarters at the Renaissance Center in Detroit, Michigan, USA, GM manufactures its cars and trucks in 33 countries. Their European headquarters are based in Zurich, Switzerland. Their Holden headquarters are in Melbourne, Victoria, Australia. In 2006, 9.18 million GM cars and trucks were produced globally under the following brands: Buick, Cadillac, Chevrolet, GMC, Holden, Hummer, Opel, Pontiac, Saab, Saturn and Vauxhall. GM is the majority shareholder in GM Daewoo Auto & Technology Co. of South Korea and has had collaborative ventures in technology and manufacturing with several of the world's automakers.

Daewoo is GM's most recent acquisition, having been rescued by the combine shortly after going into receivership towards the end of 2000. The brand has been retained for the home market of South Korea, although since January 2005 the brand's products have been sold as Holdens in Australia and Chevrolets in other markets.

Holden is the Australian division of GM, although some of its products have been exported to other countries in low volumes, as Chevrolets (Middle East, Brazil and South Africa), Buick (China), Daewoo (South Korea), Vauxhall (UK), and Pontiac (US).

Saab is a prestige marque based in Sweden and sold world-wide.

Hummer and Saturn are almost exclusively sold within US and Canada, with both of these brands having being created within the last two decades. The Hummer H3 is now made in South Africa. This car is also now available for sale in Australia

Opel is the key European brand, although high volumes of its products are made in Africa and Asia.

Since the early 1980s, Vauxhall has been a Britain-only brand, with virtually all of its models since then being identical to Opels.

GM Parts and accessories are sold under GM Performance Parts, GM Goodwrench and ACDelco brands through GM Service and Parts Operations which supplies GM dealerships and distributors worldwide. GM engines and transmissions are marketed through GM Powertrain. GM's largest national market is the United States, followed by China, Canada, the United Kingdom, and Germany. GM owns nearly-half (49%) of the finance company GMAC Financial Services, which offers automotive, residential and commercial financing and insurance. GM's OnStar subsidiary is a vehicle safety, security and information service provider.

There have only been a limited number of models bearing the General Motors brand. The GM EV1 was an electric vehicle that was offered for lease only in the 1990's, before being unceremoniously scrapped. The Holden Statesman (1971 - 1985) was originally marketed as the General Motors Statesman.