(adds details on the proposal, including when GM received it.)

 
   By Sharon Terlep and Kate Linebaugh 
   DOW JONES NEWSWIRES 
 

With time running out for General Motors Corp.'s (GM) troubled Saturn brand, a group that includes private equity firm Black Oak Partners LLC came forward Wednesday as potential buyers.

The group would initially sell GM vehicles through Saturn's network of 440 U.S. and Canadian dealers and later aim to add vehicles from other auto makers.

A GM spokesman said Wednesday the Black Oak group is among several bidders interested in Saturn, and that the auto maker plans to update dealers within the next week on the future of the brand.

GM in February promised it would have more clarity on Saturn by April 17.

The auto maker is struggling to offload Saturn, along with its Hummer and Saab brands, as it faces a June 1 deadline to restructure the business or face a government-ordered bankruptcy. A $13.4 billion government loan is keeping GM afloat as the company scrambles to slash billions in debt and overhaul its global operations after President Barack Obama shot down the company's first survival plan.

The U.S. Treasury, overseeing GM's restructuring, has been involved in the Saturn process but has not been directly negotiating the deal.

The precarious financial state of GM's ailing brands and a global credit crunch have complicated GM's efforts to find buyers for its brands.

GM spokesman Steve Janisse said the company is weighing several options for Saturn, including spinning the unit off to its dealers.

Saturn, created by GM in 1985 to fend off competition from Japanese-based rivals such as Toyota Motor Co. (TM), has underperformed GM's already dismal company-wide sales. In December, GM announced a plan to kill or sell Saturn by 2011.

In February, The Wall Street Journal reported some Saturn dealers want to spin off the brand it and sell it separately. At the time, then-Chief Executive Rick Wagoner said the company could be very open to such an offer. Wagoner was ousted in late March by the U.S. government.

The Black Oak group said its proposal for the brand would preserve 10,000 U.S. jobs and keep the Saturn retail network alive.

GM received the Black Oak proposal on April 8.

The parties didn't provide financial details of the proposal.

John S. Pappanastos, a spokesperson for the investment group, said the deal would relieve GM of franchise agreement liabilities and fallout on other brands if it closed Saturn dealerships, and would give the Saturn retailers the opportunity to make returns on their existing operations.

By Sharon Terlep, Dow Jones Newswires; 248 204-5512;

sharon.terlep@dowjones.com

By Kate Linebaugh, Dow Jones Newswires; 248 204-5515;

kate.linebaugh@dowjones.com