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OnStar North America
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OnStar Subscriber Services
PO Box 455
Station A, Windsor, ON N9A 6L7
OnStar Subscription Center
PO Box 8084 STN A
Toronto ON M5W 3W5
Need help? Push your blue button or call 1.888.4ONSTAR to speak with an Advisor today.
Need help? Push your blue button or call 1.888.4.ONSTAR to speak with an Advisor today.
The safety of our drivers and passengers is our top priority. Please drive responsibly and use your in-vehicle controls only when it's safe to do so.