Bloomberg reports now-former General Motors engineer Brian Stouffer conducted a two-year internal investigation into the out-of-spec switch at the heart of the automaker’s current recall crisis, only to find confusion and resistance along the way to finding answers as to why vehicles up through 2008 were stalling out. In addition, Stouffer reported to three different executives assigned to the investigation in one year as it moved along, as well as the lack of sufficient cases that met the criteria required. Only in late 2013, when Delphi responded to Stouffer’s inquiry by providing the document showing the changes made to the switch back in 2006, did the investigation come to a head.

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