WASHINGTON - The government yesterday was said to be moving ahead with a fresh multibillion dollar cash infusion to stabilize auto-finance company GMAC Financial Services as it continues to struggle with big losses in its home-mortgage unit.

A source who spoke on condition of anonymity says that the government aid would be about $3 billion. That would be less than the roughly $6 billion the government earlier thought GMAC would need to be stabilized.

Shoring up GMAC has been a major component of the Obama administration's massive effort to rescue ailing automakers General Motors and Chrysler.