GM, Toyota, Fiat Chrysler back Trump on California emissions challenge

WASHINGTON (Reuters) - Major automakers are siding with the Trump administration in its bid to bar California from setting its own fuel efficiency rules or zero-emission requirements for vehicles, the companies said in a filing with a U.S. appeals court late on Monday.The move by firms including General Motors Co , Toyota Motor Corp , Hyundai Motor Co , and Fiat Chrysler Automobiles NV , follows legal challenges by California and 22 states and environmental groups in September.Those challenges..