Despite GM's progress, analysts say the automaker faces a continued challenge in Europe where industry-wide sales are sliding and it is restructuring its Opel unit.

Henderson said the automaker received three offers several weeks ago on Hummer.

The spokesman said the automaker began notifying owners globally late last month.

He also said the automaker is meeting or exceeding its financial targets.

GM spokesman John McDonald said the automaker would announce details on Tuesday.

A Toyota spokeswoman said the automaker could not comment on future product plans.

Miller said the automaker has not estimated the cost of the safety action.

A Nissan spokeswoman said the automaker was checking the newspaper report.

A Chrysler spokesman said the automaker also leases or charters jets.

A Toyota spokesman said the automaker had no new cooperation deal to announce now.

GM marketing chief Joel Ewanick said the automaker would keep its advertising plans unchanged.

He also said the automaker would like to make a decision on Saturn soon.

Chrysler spokeswoman Kathy Graham said the automaker had not announced its dealership closure plans.

Fiat Chrysler spokesman Eric Mayne said the automaker is cooperating fully with the investigation.

Henderson said the automaker is also considering sales of other assets at this time.

But VW lawyer Robert Giuffra said the automaker believes it can fix those vehicles.