GM no longer makes either car.
Officials say the weight on the key ring and/or road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine. If that happens, air bags may not work.
GM spokesman Alan Adler said the automaker is aware of five frontal impact crashes in which six people died because the front air bags did not deploy. GM is also aware of 17 other crashes involving some type of frontal impact and non-fatal injuries because of the same problem.