Several Wall Street investment banks are understood to have approached EchoStar about providing the financing, which was part of EchoStar's $26bn (£17.8bn) takeover of Hughes, the General Motors division which is home to its larger rival, broadcaster DirecTV.
A spokeswoman for GM told FT.com that "General Motors had every expectation that this transaction could and would be financed quickly".
GM and EchoStar agreed the loan after rejecting a package from EchoStar's financial adviser, UBS Warburg, on the grounds that the terms would be too difficult to adhere to. This left the smaller satellite TV group $2.75bn short of the cash it needed to tie up the deal.
General Motors agreed to put up a bridge loan when EchoStar chairman and chief executive Charles Ergen offered $2.75bn of his personal shareholding in the company as security. EchoStar's bid also involves a $2.75bn bridge loan from Deutsche Bank, which was secured last week.
Investment banks are understood to be keen to provide the bridge loan so they can earn fees when EchoStar needs to raise further financing over the next 12 months.
However, on Tuesday, credit ratings agency Moody's downgraded Hughes Electronics shares to junk status, putting further financing at risk. The decision was based on concerns about Hughes' rising debt and poor operating performance. Moody's also placed Hughes on review for a further downgrade.
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