General Motors had various components.
General Motors . In addition to brands selling assembled vehicles , GM has also had various automotive-component and non-automotive brands , many of which it divested in the 1980s through 2000s . These have included Euclid and Terex ( earthmoving/construction/mining equipment & vehicles ) ; Electro-Motive Diesel ( locomotive , marine , and industrial diesel engines ) ; Detroit Diesel ( automotive and industrial diesel engines ) ; Allison ( Aircraft engines , transmissions , gas turbine engines ) ; Frigidaire ( Appliances including refrigeration and air conditioning ) ; New Departure ( bearings ) ; Delco Electronics and ACDelco ( electrical and electronic components ) ; GMAC ( finance ) ; General Aviation and North American Aviation ( airplanes ) ; GM Defense ( military vehicles ) ; and Electronic Data Systems ( information technology ) . General Motors produces vehicles in 37 countries under twelve brands : Chevrolet , Buick , GMC , Cadillac , Holden , HSV , Opel , Vauxhall , Wuling , Baojun , Jie Fang , and Ravon .