GM concludes internal investigation of fatal ignition system failure . `` GM 's internal assessment confirms many of the troubling details our ongoing House investigation is uncovering , '' wrote Rep. Diane DeGette of Colorado , who is the top Democrat on the House subcommittee tasked with the GM investigation . But House and Senate committees continue to investigate the problem , promising results . Some in GM knew for years there was a problem , but only started big recall this year .
GM concludes internal investigation of fatal ignition system failure . But House and Senate committees continue to investigate the problem , promising results . Some in GM knew for years there was a problem , but only started big recall this year .