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Onstar Customer Service
1(888) 466-7827
for OnStar & connected services

OnStar Contact Number

Website :-

TTY for Hearing/Speech Impaired

OnStar Mailing Address
OnStar Member Services
PO Box 1027
Warren, MI 48090-1027

OnStar Payments
Dept #77246
OnStar Service Plan Center
PO Box 77000
Detroit, MI 48277-0246

Reference Links –

Safety & Security
Connected Services
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Q What is OnStar?

Q Which vehicles have OnStar?

Q How much does OnStar cost?

Q How do I activate or renew my account?

Q How do I report a concern with my OnStar services?

Q What services does OnStar offer in an emergency?

You can use Emergency Services* to help others on the road too. If you witness a crash or see a stranded vehicle or a downed power line, you can become a Good Samaritan by pushing the red Emergency button. A specially trained Advisor can use GPS technology and the information you provide to rush whatever assistance may be needed. Emergency services are only available to Members with a paid plan.

Q What is Crisis Assist?

Q What do I do if I’m in a crash?

Q What is a Good Samaritan?

Q Does pushing the red Emergency button call 911?

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  • Saturday09:00 AM - 05:00 PM
  • Sunday11:00 AM - 05:00 PM

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