Well I would not be surprised if the big trucks and oversize vehicles will take a hit due to the oil prices.
Perhaps if they start to concentrate in economy size cars they will do better I can not even imagine General Motors going Bankrupt.
GM has $300 billion in debt finance.yahoo.com...
...and has a market cap, now, of $16 billion. See the problem there? The bondholders could buy the company nearly 20 times over if they used their money to buy stock instead of loan it to the company. The implication is clear--that GM is headed towards bankruptcy, and will default on the bondholders, who will then own a company worth less than $16 billion dollars!
For every one point that interest rates rise, refinancing GM's debt will cost an additional $3 billion in annual interest payments -- money that they clearly do not have! Where is GM going to get another $3 to $6 to $9 billion as interest rates rise by 1%, 2%, and 3% more? Selling cars? Nope. Selling stock? Unlikely in this market! Borrowing more? From who? The U.S. government itself is propping up this bond market, and there are no buyers even for U.S. bonds, and there haven't been for months now!
So, therefore, GM will soon be a $300 billion dollar blow-up!