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Cancel OnStar Service [HOWTO]

If you need to cancel your OnStar service, you will need to do it by phone or via the dedicated OnStar button in your vehicle. Sadly, OnStar does not allow you to cancel online 🙁 Their specific cancellation policy is as follows: If at any time you wish to cancel your OnStar service, press your blue button to speak with an Advisor or call 1.888.4.ONSTAR (1.888.466.7827). Cancelling your service cannot be done online.     Source: OnStar Help & Support