Chrysler and Italian automaker Fiat has signed off on a deal brokered by Uncle Sam to become what's known as Chrysler Group. Fiat will initially take a 20 percent stake. It can't take a majority stake until the new Chrysler pays back the 15.5 billion dollars it took from the Treasury Department. The UAW holds a 55 percent stake, leaving an 8 percent stake for the U.S., 2 percent for Canada. The Supreme Court cleared the way for the deal yesterday, after delaying the sale pending review of a case brought by Indiana state pension funds.