The U.S. Treasury Department has decided to delay selling more shares of General Motors (NYSE:GM) until after July, hoping that the stock will rise substantially in that time, two people familiar with the decision told Bloomberg News.The Treasury, which owns one third of GM, can file for a secondary offering as soon as May 22nd. Such a process requires a lengthy review by the Securities and Exchange Commission, so the department will wait until it can use an S-3 filing, as soon as July 1st, that allows for shares to be sold more quickly, said the people, who asked not to be identified as the plans are private.The Treasury department doesn’t expect to get to the $44 average share price it needs to break even on the $49.5 billion investment. Further share sales need to average $53 for that to happen to make up for the $33 per share IPO price, unlikely given the stock is currently trading around $32.General Motors (NYSE:GM) has a potential upside of 38.1% based on a current price of $31.35 and an average consensus analyst price target of $43.29.