The Associated Press reports that "a person briefed on the matter" says GM will ask Volt owners to come in to dealers so the structure around their car's batteries can be strengthened.
Michigan Radio's Rina Miller is following this story and will have more soon.
More from the Associated Press:
The move is similar to a recall and involves the 8,000 Volts sold in the U.S. in the past two years.
The move comes after three batteries caught fire after side-impact crash tests done by federal safety regulators. The fires occurred seven days to three weeks after the tests and have been blamed on a coolant leak that caused an electrical short. No fires have broken out in real-world crashes.
The person says GM will contact Volt owners and have them return the cars to dealers for several structural repairs.
The repairs are a step below a formal recall.
The person did not want to be identified because GM executives will announce the plan later Thursday.