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There are plenty of ways to get ahold of us — find the way that best suits you.

  • Phone
  • 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
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