Two words. Pension obligations.
These old line companies with huge pension liabilities are always going to have weak looking balance sheets. In addition, these companies have been consistenly underfunding their pensions or their financial statments would look so red, you'd a thunk OJ took a knife to them.
I personally would stay away from US automotive stocks for the time being (probably until they file bankrupcy, which will never happen, at which point they can get out from underneath these outrageous pension obligations). That being said, I wouldn't buy Toyota either. There was an interesting aritcle in the WSJ about 2 weeks ago about how Toyota could actually be a takeover target due to how they've leveraged their stock with their subordinate companies. I don't think it's going to happen, but Toyota's stock has also been severely underperforming.