c Corporation is a subsidiary of General Motors that provides subscription-based communications, in-vehicle security, emergency services, hands-free calling, turn-by-turn navigation, and remote diagnostics systems throughout the United States, Canada, China, Mexico, Europe, Brazil, and Argentina.
A similar service is known as Opel OnStar in western Europe.
All Contacts
Here are all the ways to contact OnStar customer support, added by users like you. Some offer better help than others, click for details about customer service and more.
Displaying total of 3 customer service contacts.