General Motors Corp. (GM) expects to submit a government-mandated recovery plan at 5 p.m. EST on Tuesday, although the report might not include critical concessions from the company's labor unions and bond holders.

Chrysler LLC is working on a similar disclosure and expects to release its plan around 5 p.m. EST as well.

The two auto makers, surviving on $17.4 billion in federal aid, are required to submit detailed restructuring plans to the U.S. Treasury on Tuesday as a condition of the loans.

GM shares were down 13.5%, or 34 cents, at $2.16 in recent trading. The auto maker's stock has lost more than 90% of its value in the last year.

At GM, overnight negotiations with the United Auto Workers failed to produce a deal that would substantially cut labor costs, sources familiar with the talks said. Bargaining continued Tuesday.

The auto maker also is working to convince bond holders and other creditors to accept terms that will reduce its substantial debt.

GM said it will submit its restructuring plan regardless of whether is succeeds in cutting deals with the union or bondholders.

GM's plan, which sources say is 800 to 900 pages long, explains how the auto maker can turn around operations that have lost more than $70 billion since 2004. It is expected to detail plant closings, plans to eliminate models and brands and to further reduce structural costs.

UAW negotiations hinge on GM's efforts to change terms under which it pays the union to assume responsibility for billions in retiree medical costs.

The two sides made progress over the holiday weekend but were still hammering out significant differences, according to people familiar with the talks.

GM plans to roll out the plan publicly on its Web site at 5 p.m., followed by a news conference around 6:30 p.m. with Chief Executive Officer Rick Wagoner and Chief Operating Officer Fritz Henderson.

In an email to dealers, GM Sales Chief Mark LaNeve asked for support and urged them to focus on selling cars and trucks.

"While a lot of our attention will be focused on the viability plan update the next few days, we cannot lose focus on our customers," he wrote.

Ford Motor Co. (F) didn't ask for federal government aid, although the auto maker is likely to seek concessions in line with what GM and Chrysler win.

Meantime, Canadian Auto Workers President Ken Lewenza plans to speak about the restructuring plan at 7 p.m. EST Tuesday.

GM's Canadian operations are expected to shrink substantially under GM's restructuring, according to people familiar with the plan. A huge drop-off in sales of profitable trucks, a key product for GM's Canadian factories, have added to cost pressures in the country.

GM, which employs about 12,000 people in Canada, earlier this year declined to accept aid from the Canadian government, saying it preferred to focus on restructuring over the long term.

Canadian Prime Minister Stephen Harper on Tuesday told reporters he doesn't anticipate GM entirely pulling out of Canada, according to Reuters.

"Obviously, there is a range of options. and the restructuring itself will be quite complex," Reuters quoted Harper as saying. But I'm confident that with Canada, with the partnership with Ontario coming to the table with our share of funding that we'll maintain a strong industry in this country."

-By Sharon Terlep, Dow Jones Newswires; 248-204-5532; sharon.terlep@dowjones.com.

(John Stoll contributed to this article.)