GMAC get lifeblood from Citi

--GM sold 51% of controlling stake of GMAC to Cerberus Capital last year --GMAC replace its exisiting two-year term $10 bil credit line with a one year $21.4 bil one --financial support from Citi allows GMAC to expand market share after subprime-mortgage crisis knock out more than 100 home-loan mortgage lenders --ResCap is one of GMAC residential mortgage unit (9th largest US mortgage lender with $41 bil in new loans), injected with money from GMAC last money