DETROIT (AP) -- General Motors is recalling some 2012 Chevrolet Impala and Buick LaCrosse models to fix safety problems.GM says 11,915 Impalas are being recalled in the U.S. and Canada because a power steering fluid hose gets too close to the catalytic converter. The hose can melt, and fluid can leak and start a fire.GM said Friday that it knows of no complaints or injuries. The large sedans were built from April 19 through July 29.GM also is recalling 4,293 LaCrosse sedans in the U.S. and Canada to fix software that runs a computer that controls the brakes. The software may not detect a malfunctioning sensor. If the sensor fails it could change the way the car handles and cause a crash.GM says no crashes have been reported.