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GMAC Customer Service

1-800-200-4622

How To Contact GMAC Customer Service

GMAC is a global financial services company that was founded in 1919. Initially formed to provide automotive finance products and services to General Motors dealers and clients, GMAC has since expanded its business to include mortgage operations, insurance, commercial finance and online banking.

Phone Number: 1-215-734-8899

GMAC Mortgage Loan Servicing Center
3451 Hammond Avenue
Waterloo, IA 50702
1-319-236-5400

29 replies on “GMAC Customer Service

1-800-200-4622

Jarrod at customer service was very professional and efficient as he was able to resolve my lien release on a purchased automobile quickly.

they haven’t gotten any better! I need my release letter too. Same song and dance, took my information, took it again, no letter…did you ever get in touch with a person who could help or just the 800# people. I agree they are nice, but they DON’T HELP. Ally needs to offer tier 2 resolution…not just the passive request sending they currently use.

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