G.M. recalls nearly four million additional cars -- including the 2014 model-year Chevrolet Impala -- for similar ignition defects.

Q: We are having trouble with our 2012 Chevy Sonic. The key gets stuck in the ignition. And now, the key won’t turn the other way so that we can start the car. Sometimes just jiggling the ste… ...

General Motors Co. has another ignition switch problem that can cause engines to stall, but this time it was discovered before anyone got hurt. The automaker is recalling about 3,300 big pickups ...