You can visit your vehicle Owner Center to sign up or get help from an Advisor by pushing the blue OnStar button in your vehicle or calling 1.888.4ONSTAR (1.888.466.7827). You can enroll anytime, and if you are enrolled in a trial plan, your paid OnStar service plan will be added to the time remaining in that plan. More info on how to get OnStar and Connected Services here: https://www.onstar.com/us/en/get-onstar/
