IT’S NOT A “RECALL,” IT’S A “CALL BACK:” GM to call back 8,000 Chevy Volts. “General Motors will strengthen the structure around the batteries in its Volt electric cars to keep them safe during crashes, a person briefed on the matter said Thursday. GM will ask Volt owners to return the cars to dealers for structural modifications, said the person, who did not want to be identified because GM executives plan to announce the repairs later Thursday.”