Onstar Customer Service Phone Number

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Onstar customer service phone number is 1.888.466.7827 or 1.877.248.2080 (TTY for Hearing/Speech Impaired). If you need to talk to a live person in Onstar customer service you need to dial 1.888.466.7827 or 1.877.248.2080  (TTY for Hearing/Speech Impaired). To speak with a live agent you need to know about their customer service.

If you need another service from Onstar current customers you can select one of these options:

  • If you have any questions or problems please take a look at their help page first at Help page.
  • If you have any problems you can see more their Safety & Security.
  • If you want to be part of their connected service please take a look at Connected Services.
  • If you want to know how many benefits from Onstar, you can select here: Benefits.

Onstar Customer Service Options

Onstar Customer Service Phone Number

  • Onstar customer service phone number is 1.888.466.7827.
  • Onstar TTY for Hearing/Speech Impaired phone number is 1.877.248.2080.

Onstar Customer Service Hours

Onstar live customer service agents are available 24 hours a day, 7 days a week.

Onstar Mailing Address

OnStar Member Services

PO Box 1027

Warren, MI 48090-1027

Onstar Live Chat Support

Onstar doesn’t offer live chat support. Best way to contact Onstar is to call them at 1.888.466.7827 or 1.877.248.2080 (TTY for Hearing/Speech Impaired).

Onstar Support E-mail

Onstar doesn’t offer support e-mail. Best way to contact Onstar is to call them at 1.888.466.7827 or 1.877.248.2080 (TTY for Hearing/Speech Impaired).

Onstar Social Media

If you would like to contact them through social media you may reach them at:

  • Onstar customer service could be contacted via: Facebook
  • You can also reach Onstar support via: Twitter
  • You can also reach Onstar support via: Instagram
  • You can also view latest Onstar video on Youtube

Onstar Customer Service – By Phone Number or Otherwise

While Onstar customer service phone number is 1.888.466.7827 or 1.877.248.2080 (TTY for Hearing/Speech Impaired). There are 3 ways to contact Onstar, are by phone, mailing address, and social media. You can choose one of them if you need to talk to live person with Support Agent.