GM recalls about 308K cars; air bags may not work in crash

DETROIT — General Motors is recalling nearly 308,000 older Chevrolet Impala sedans in the U.S. and Canada because the air bags might not inflate in a crash. The recall covers Impalas from the 2009 and 2010 model years that were made before Feb. 10, 2010. GM says in government documents that the front passenger seat