GM s car venture with SAIC Motor Corp sold 1.39 million cars in 2012  up 13.1 percent  while sales at the partner s mini vehicles venture in south China rose 12 percent to about 1.46 million  according to the companies  websites. GM is expected to announce soon its overall China sales numbers  which will include imported vehicles  for December. In 2011  GM sold 2.55 million vehicles in China  up 8.3 percent from a year earlier.