Here's an NYT article that kind of explains things:
http://www.msnbc.msn.com/id/30366383/
Chapter 11 does not mean that Chrysler or Dodge will cease to exist, nor that parts will become unavailable. Bankruptcies aren't all that black and white, as the Chapter 11 conditions can be "negotiated" as to who gets what and when. Failing the Chapter 11 proceedings then means the company will cease to exist, creditors will seize assets, etc etc.
You guys can thank the UAW for the current mess. They refused to back down on pensions and wages, forcing these proceedings. Personally, I think the UAW (and unions in general) need to be outlawed and right quick. They're driving the economy into a shambles. I'd actually like to see Dodge completely fold, sell the name and designs as an asset, then restart back up again as something like Dodge Motor Company. Only this time make sure the UAW stays completely out of the picture. If employees threaten to unionize, then simply fold up shop again until people get some brains...
Rod