There are four easy ways to sign up for GMAC Direct Pay:

Register on GMAC Account Centerby creating a profile, adding your automotive account, and selecting “Enroll in Direct Pay” from the Action drop down menu on the Account Summary page.

Use the PIN and authorization form included in the GMAC Welcome Package, you received shortly after financing or leasing a vehicle through your dealer and GMAC.
Call 800-200-4622 and follow the prompts to complete the GMAC Direct Pay enrollment process.

Complete and mail the authorization form included in the GMAC Welcome Package, mailed shortly after financing or leasing a vehicle through your dealer and GMAC.

Obtain an authorization form by calling 1-800-200-4622.

For more information, you can Contact GMAC Auto Financing.