An internal investigation into General Motors’ handling of an ignition switch defect connected to at least 13 deaths has determined that the eventual solution to the problem cost the company nothing.

General Motors recalled every 5th generation Chevrolet Camaro ever built last month due to a faulty ignition switch which may allow the key to be knocked loose if it is bumped by the driver’s knee.

A GM engineer who approved a change to faulty ignition switches in models that have now been recalled also appears to have signed off on not issuing a new number for that changed part, according to an ...