Considering all the downsizing, attemps to restructure, and other measures taken to combat the diminuishing market share that have failed, I unfortunately cannot share your optimism of the stock bouncing back. GM is suffering from more than a recession. It is suffering from one of the major causes of this recession - the rising gas prices. And although many old old companies that are suffering from the recession, the auto industry and airlines are suffering from gas prices primarily, which may not be cyclical this time around.
However, buying may not be that bad of an idea, as a takeover by a foreign car manufacturer would not be impossible.