According to a new report from Bloomberg, Ewanick was fired for failing to reveal the full cost of a sponsorship deal with England's Manchester United Football Club. A series of smaller gaffes leading up to the Manchester deal also hurt Ewanick's stock with GM CEO Dan Akerson.
GM has since revised parts of the sponsorship.
Prior to the Manchester United deal Ewanick was already in hot water with Akerson for two previous public missteps. Just days before Facebook's IPO Ewanick proclaimed that the Detroit automaker was abandoning advertising on the social media site, drawing ire from Akerson. Just days after that, Ewanick went public with GM's decision to suspend all Super Bowl advertising.
So far Ewanick has yet to land a new job.