Call us. Write us. Chat us up. Here’s how.
OnStar Phone Number
Contact OnStar by Mail
OnStar Member Services
P.O. Box 1027
Warren, MI 48090-1027
TTY for hearing/speech impaired
Payments
Dept #77246
OnStar Service Plan Center
P.O. Box 77000
Detroit, MI 48277-0246
Get support.
Check out our support pages for frequently asked questions on a variety of topics.
We’ve all got stories. What’s yours?
Has OnStar saved the day for you? Have you found a service or feature that surprised you? An Advisor who went above and beyond? We love stories. And we’d love to hear about your experience.