GM and Chrysler asked for billions of dollars more in federal aid on Tuesday and announced sweeping changes including capacity reduction and job cuts.

Some Wall Street analysts were disappointed that the restructuring plans submitted to the U.S. Treasury did not include key concessions from the United Auto Workers union and the bondholders.

One analyst said that taking the bankruptcy option off the table would reduce the bargaining power of the companies.

Both GM and Chrysler analyzed a possible bankruptcy filing in their restructuring plans but stressed that it was not their preferred method for reorganizing and that they hoped to avoid this scenario.

GM, which has requested $16.4 billion in additional loans from the U.S. government for a total of up to $30 billion, has said it would run out of cash as soon as March without new federal funding.

The request came shortly after smaller rival Chrysler LLC asked for additional $5 billion in aid.

GM's request that a sizable chunk of total aid come in the form of preferred equity rather than debt is a "tacit acknowledgment of the fact that GM may emerge from an out-of-court process as a still highly levered firm," JP Morgan analyst Himanshu Patel said.

David Leiker, analyst with Robert W Baird, still sees bankruptcy as the best option for a reorganization.

"Though likely to be painful near-term, we continue to believe that the challenges to restructuring GM and Chrysler are too complicated to be met outside of a bankruptcy," Leiker said.

In its restructuring blueprint, GM estimated that if it was forced to reorganize in a traditional bankruptcy, the tab for the government could touch $100 billion in bankruptcy financing.

Chrysler estimated that the bill for such a scenario could hit $1,200 per taxpayer.

GM also outlined cost-reduction actions but still has to reach an agreement with its bondholders and the UAW on how to reduce the roughly $48 billion it owes to both groups.

But an equity-for-debt swap, which is being considered, could significantly hit stockholders.

"A substantial majority of the pro-forma equity in General Motors would be distributed to exchanging bondholders and the UAW VEBA," Credit Suisse analyst Chris Ceraso said. "The existing equity holders would largely be wiped out by the bond and VEBA exchanges."

GM shares were down 10 cents or 4.6 percent at $2.08 at midday on the New York Stock Exchange.

(Reporting by Poornima Gupta and David Bailey, editing by Matthew Lewis) Keywords: GM ANALYSTS/ (poornima.gupta@thomsonreuters.com; + 313 967-1901; Reuters Messaging: poornima.gupta.reuters.com@reuters.net) COPYRIGHT Copyright Thomson Reuters 2009. All rights reserved. The copying, republication or redistribution of Reuters News Content, including by framing or similar means, is expressly prohibited without the prior written