Looking for support for your current GMC or more information on a new GMC? We can help.
Owner’s Manuals, information on available support services, and how-to instructions, tips and general information about the features on your vehicle. Bluetooth®,† OnStar®,† and your GMC Infotainment System† are among the many features covered.
Manage your profile and payments, view vehicle service and diagnostic information.
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Interested in product information or specs for your vehicle or a new GMC?
The following GMC call centers are available to help with questions and general feedback during the hours listed below.
For questions about your GMC vehicle, new vehicles or my account information:
For the hearing and speech impaired, please call our Telecommunication Relay service at 711 for assistance.
Monday – Saturday: 8 a.m. to 9 p.m. (EST)
For help with adaptive equipment for persons with disabilities:
Monday – Friday: 8 a.m. to 8 p.m. (EST)
Saturday & Sunday: Closed
For help on the road, request Roadside Assistance† via the myGMC app or call us using the appropriate number below:
All lines available 24 hours.
For questions about My GMC Rewards and My GMC Rewards Card please call us at:
Monday – Saturday: 9 a.m. to 8 p.m. ET
Please mail your comments, questions or concerns to one of the following Customer Assistance Centers:
In the United States:
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
Canada - GM of Canada
1908 Colonel Sam
L1H 8P7, Canada
Mail Code 163-005