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GMAC Mortgage Customer Service

GMAC Mortgage Customer Service is just one phone call away for anything you may require – from loan product information to issues involving the servicing of a mortgage product. GMAC is an acronym for General Motors Acceptance Corporation, which came into existence in 1919. However, the company got a name change in 2010 and it came to be known as Ally Financial. Despite the change in name of the bank-holding company headquartered in Detroit, Michigan, its home mortgage division, GMAC Mortgage LLC, continues to be known by its original name even now.

The corporate headquarters of the GMAC Mortgage LLC is located in Fort Washington, PA, but it also has a loan servicing center in Waterloo, IA. As one of the biggest loan servicers in the country, GMAC mortgage loan servicing center handles a large number of queries each day from different parts of the nation. We will be providing you the complete addresses and phone numbers to contact these operating centers of the company.

GMAC Mortgage Customer Service Phone Number

GMAC mortgage customer service is accessible through phone, fax, email and ordinary mail. The most used phone number is an automated service which is available 24 hours a day for new as well as existing customers. This number is 1-800-766-4622. The other contact number is 1-877-941-4622, which is generally used for making enquiries on new loan products. There also exists a special phone line for the hearing-impaired, which is 1-800-335-9228. The fax number to reach GMAC mortgage customer care is 1-866-709-4744. One can also send email but it can be done only through a secured network, which is available at

GMAC Mortgage Customer Service Address

The mailing address to send your post containing general enquiries is as follows:
GMAC Mortgage
Attn: Customer Service
P.O. Box 4622
Waterloo, IA 50704-4622
A qualified written request should be sent to the following address:

Attn: Customer Care
P.O. Box 1330
Waterloo, IA 50704-1330

The corporate headquarters has the following address:

1100 Virginia Drive
Fort Washington, PA 19034
Phone Number: (215) 734-8899

The mail to GMAC Mortgage Loan Servicing Center can be sent to the following address:

3451 Hammond Avenue
Waterloo, IA 50702
Phone Number: (319) 236-5400


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