They did the same thing back when emission regulations came on the scene. Spent years throwing a corporate hissy fit while the japanese developed emission controls that actual worked and didn't impact performance or economy. A few years earlier they were trying to convince the Americans that safety improvements would make a car cost more than the average American can afford. Then they answered the OPEC embargo with the friggin' Vega. Meanwhile the Japansese...
Now GM can't even get anything out there that isn't butt-ugly (the Corvette being the only notable exception)let alone something that is innovative or reliable.
And their new truck ad campaign is just vile...if you ain't country, you ain't American. And make more nice white Christan babies; "this is our purpose."

GM, you screwed yourself, you are a dinosaur now as useful as a blacksmith in a computer room.