Some GM cars are having more problems that need repair.
General Motors says another part needs to be repaired in the 2.6 million small cars already being recalled for an ignition switch defect.
GM says it will replace ignition lock cylinders on the cars.
Right now, drivers can remove the key while the engine is still running, which could lead to a rollaway or crash.
GM knows of one related injury.
The recall affects the Chevrolet Cobalt and HHR, Saturn Ion and Sky and Pontiac Solstice and G5 from the 2003 through 2011 model years.
The same cars were recalled for defective ignition switches that can cause sudden stalling.
GM links 13 deaths to that issue, which is under investigation by the U.S. government.
GM also said it expects to take a $1.3 billion recall-related charge in the first quarter.