DETROIT (AP) -- General Motors is adding more than 588,000 vehicles to a recall to fix ignition switches that can shut off engines and cause crashes.
The company says it's adding Saturn Ion compacts from 2003 through 2007, and Chevrolet HHR SUVs and Pontiac Solstice and Saturn Sky sports cars from 2006 and 2007.
The additional vehicles increase the total recall to 1.37 million. GM announced Feb. 13 that it would recall 780,000 Chevrolet Cobalts and Pontiac G5s from the 2005 through 2007 model years.
GM says the problem has been linked to 31 crashes and 13 front-seat deaths.
GM says a heavy key ring or jarring from rough roads can move the ignition out of the run position, cutting of the engine. If that happens, the front air bags may not work.
The recall affects Chevrolet Cobalts and Pontiac G5s from the 2005 through 2007 model years.
U.S. safety regulators say the weight of the key ring and rough roads can move the ignition switch out of the run position, cutting the engine and electricity. If that happens, air bags may not work.
GM says there have been 22 crashes from the problem. All were off the road and happened at high speeds.
Dealers will replace the ignition switch for free. GM says owners should remove nonessential items from key rings until the problem is fixed.