Chrysler, Fiat and the United Auto Workers reached a tentative labor agreement over the weekend that could provide the troubled American automaker with a better shot at longevity. Though complete details on the UAW accord have not yet been released, the terms are likely to closely resemble Chrysler's new agreement with the Canadian Auto Workers, ratified over the weekend. The Canadian agreement cuts labor costs to the level paid by non-union plants run by Asian companies such as Toyota, or by $19 Canadian dollars per hour (U.S. $16).