Sen. Claire McCaskill , Democrat of Missouri whose subcommittee is handling the issue , announced Thursday that she , too , would hold a hearing this summer . Automaker concludes internal investigation of fatal ignition switch problem . The National Highway Traffic Safety Administration is investigating the cause and effect behind a defect that could lead to cars stalling in cold weather. Some in GM knew for years there was a problem , but only started big recall this year .
Automaker concludes internal investigation of fatal ignition switch problem . The National Highway Traffic Safety Administration is investigating the cause and effect behind a defect that could lead to cars stalling in cold weather. Some in GM knew for years there was a problem , but only started big recall this year .