Jul 3, 2009 (China Knowledge) - General Motors Corp (GM) said on Wednesday that sales at Shanghai General Motors Co Ltd (Shanghai GM) jumped 71.5% year on year to 60,356 units in June, sources reported.During the period from January to June, Shanghai GM, the joint venture (JV) between GM and Shanghai Automotive Industry Corp (SAIC), http://www.chinaknowledge.com/Newswires/News_Detail.aspx?type=1&NewsID=24993