GMAC Auto Financing was renamed Ally Financial Inc. on May 10, 2010. As of September 2014, Ally Financial's Auto Finance Customer Service department can be reached at 1-888-925-2559.
Customer care associates are available between 8 a.m. to 11 p.m. EST Monday through Friday and 9 a.m. to 7 p.m. EST Saturday and Sunday. Ally Financial can also be contacted by mail at P.O. Box 380901, Bloomington, MN, 55438. To report fraud on an Ally Financial account, an individual can call 1-800-971-6037. The fraud hot line is open 24/7. As of December 2010, the U.S. Treasury owned 73 percent of Ally Financial, with the remainder owned between General Motors, Cerberus Capital Management and other investors.