An American automaker is looking for the key to a problem.
There has been another recall by General Motors.
The automaker calling back another 3 million cars because of a defect that causes a similar problem to one that led to an earlier massive recall of small cars and is linked to 13 deaths.
The ignition switches in Chevrolet Impalas, Cadillac Devilles and five other models can slip out of the "run" position if the keychain has too much weight on it and the car is jarred.