A recall of three General Motors vehicles may expand by 5,000 cars as federal regulators investigate a problem that can stall engines or cause fires.
GM recalled more than 38,000 Chevrolet Malibu Eco, Buick LaCrosse and Buick Regal sedans in May to address the problems with defective generator control modules. Each car, from the 2012 and 2013 model years, has GM's eAssist gas-electric hybrid system.
The cars covered by the recall had been sold, according to news services, but GM agreed to test vehicles that had not been sold.
A fire was reported in one of the unsold vehicles, according to regulators, prompting the possibility of the expanded recall, news reports said.
GM told news services that it continues to cooperate with the investigation.