Troubled US carmakers GM and Chrysler have asked the US government for another $21.6bn (Ł15.2bn) in support, on top of the $17.4bn already received.
The auto giants also plan to axe 47,000 and 3,000 jobs respectively, as well as shedding a number of car models.
The moves form part of their drastic restructuring plans submitted to the US Treasury Department on Tuesday night.
It came as the United Auto Workers (UAW) union reached agreement with GM, Chrysler and Ford on contract changes.
The UAW is one of a number of stakeholders whose agreement is needed before the proposed plans can be pushed through.
General Motors said it would try to borrow up to $16.6bn more from the government, on top of the $13.4bn it has already received.
Its plan includes cutting 47,000 jobs and closing five more US factories, with about 26,000 of the cuts taking place outside the US.
GM AUTO RESCUE PLAN
Cash aid sought - $16.6bn
Job cuts - 47,000
Production cut - 5 plants
Sales target 2009 - 11.5 to 12m
Car models axed - 12
The job cuts would take place by the end of 2009 and are the largest work force reduction announced by a US firm in the current downturn.
GM has also put its Saab business up for sale, and "given the urgency of stemming sizeable cash demands associated with Saab operations" is requesting Swedish government financial support prior to any sale.
However, on Wednesday the country's Enterprise and Energy Minister Maud Olofsson told Swedish public radio that "voters picked me because they wanted nursery schools, police and nurses, and not to buy loss-making car factories".
GM says that it could be in profit within two years and fully repay its loans by 2017.
'Lot of work'
In December, GM had said it would cut the number of plants from 47 in 2008 to 38 by 2012, but has now said a further five factories will be shut, which would leave it with 33 facilities.
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