how to activate OnStar

activating your OnStar service
is as easy as pushing a button

have a new vehicle equipped with OnStar?

Your OnStar service is already activated. Just push the blue button and an Advisor will help you get started.

Problems?
Call 1-888-4-ONSTAR
(1-888-466-7827)

have a pre-owned vehicle equipped with OnStar?

In your vehicle, push the blue button and follow the prompts to speak to an Advisor and ask to be activated on your "Three Months on Us" Trial. All at no charge, with no credit card required.