GMAC has had to put up with a lot of headaches lately, thanks to its residential real estate finance unit, Residential Capital.

Last week, the mortgage lender was hard at work on a $14 billion debt restructuring to stave off bankruptcy. That arrangement cost ResCap anyway, in the form of downgrades on its unsecured debt from both Fitch Ratings and Standard & Poor's. Fitch Ratings went a step further and downgraded GMAC's issuer default rating further into junk territory. News reports also had it that GMAC was negotiating the terms of a $3.5 billion loan to keep ResCap out of bankruptcy.

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