General Motors Corp. said in a government filing Thursday that its accounting firm has found there is “substantial doubt” about the automaker’s ability to survive.

The embattled automaker made the disclosure in a 480-page filing with the Securities & Exchange Commission.

GM has sustained large and continuing losses, while saying it needs additional federal loans to remain in business. Thursday’s statement from the company’s auditors presents another hurdle the automaker will have to clear as it makes the case that it deserve additional taxpayer support going forward.

The Obama administration, under the terms of the $13.4 billion in federal loans GM has already requested, must determine that the company’s plans make it viable in the long run.

The government must determine that GM has a “positive net present value” or else demand repayment of the loans within 30 days – a development that would almost certainly plunge the company into bankruptcy and quite possibly force it out of business.

But the government has wide latitude in how it judges the company’s net present value, based on assumptions it makes about future sales, car prices and costs for the company going forward. The administration clearly does not want to force the largest U.S. automaker into bankruptcy.

The GM filing disclosed that the Treasury already agreed to waive requirements that the automaker meet certain terms of the original loan agreement, including that it win agreement with creditors to convert two-thirds of its unsecured debt to equity by Feb. 17.

But even if the Obama administration continues to give support to GM (GM, Fortune 500) and rival Chrysler LLC, which has also received federal loans, Thursday’s filing could create problems in its relations with suppliers and banks.

For example, concerns about GM’s future could cause companies that supply it with parts start to demand cash on delivery from the cash-starved automaker, according to GM’s filing.

While parts makers would be reluctant to damage their largest customer with such a demand, they may have no choice because of GM’s filing. Those parts makers’ own auditors and banks could use the doubts raised by GM’s auditors to raise questions about their own future.

Privately held Chrysler does not have to file a year-end financial statement with the SEC. Last week,Ford Motor (F, Fortune 500) said its auditors have not substantial doubt about its future. Ford went into this auto crisis with a much stronger cash position than GM or Chrysler.

GM said Thursday auto sales, which have plunged more than 40% in recent months, must rebound by next year if it is to survive.

Meantime, GM also said it needs additional federal loans to stay in business.

GM received $13.4 billion so far, and it has asked for up to $16.6 billion more. In addition, it is seeking $7.7 billion in loans to convert production from light trucks to more fuel efficient cars under an Energy Department loan program.

“The failure to obtain sufficient funding from the U.S. government or governments outside the United States may require us to shrink or terminate operations or seek reorganization for certain subsidiaries outside the United States,” the filing said.

“If we fail to obtain sufficient funding for any reason, we would not be able to continue as a going concern and could potentially be forced to seek relief under the U.S. Bankruptcy Code,” GM added.

GM’s stock was 12% lower in premarket trading.

From The Los Angeles Times:

Reporting from Washington — The House approved a $14-billion bailout package for U.S. automakers Wednesday, but the fate of the plan — and of some of the nation’s most storied companies and brand names — remained uncertain because of deep-seated Republican opposition in the Senate, where Democrats cannot pass the bill without GOP help.

The 237-170 House vote came after the White House and Democratic leaders finalized a deal empowering a government “car czar” to force the companies into bankruptcy by next spring if they don’t restructure.

But many Senate Republicans are weary of government bailouts and worry that providing money to automakers will lead other industries to seek aid. Many on Capitol Hill also are convinced they should have attached more strings to the $700-billion Wall Street bailout.

Several news outlets are reporting that GM has adjusted their asking price for temporary salvation at $4 Billion in December and another $4 Bill in January. Convincing Congress to bail out these American Automakers might be an impossible feet, but at least Rick knows how to show off not one but two of Chevy’s best new products at one time.