How to cancel OnStar: the three methods that work

You can cancel OnStar by phone, through your OnStar account online, or by mail. The phone method is fastest — you call OnStar directly, confirm your vehicle identification number (VIN), and the representative cancels on the spot. Online cancellation takes a few minutes if you have your account login. Mail works if you prefer a paper trail, though it takes longer to process.

OnStar does not charge an early termination fee, so you can cancel at any point in your subscription. Your service stops on the date you request, not at the end of a billing cycle. If you have already paid for a month you will not use, OnStar may refund the unused portion — this depends on how much time remains and your specific plan.

Key Takeaways

  • Call 1-888-466-7827 to cancel by phone; have your VIN and account number ready.
  • You can cancel online through your OnStar account dashboard if you remember your login credentials.
  • Cancellation takes effect when ready; you do not have to wait until the end of a billing period.
  • OnStar does not charge an early termination fee, and you may receive a refund for unused service depending on your plan.

Cancelling by phone with OnStar customer service

Call OnStar at 1-888-466-7827. You will reach a representative who will ask for your VIN (found on your vehicle registration or driver's side door jamb) and your account number. Have both ready before you call to speed up the process.

Tell the representative you want to cancel your subscription. They may ask why you are cancelling or offer you a discounted rate to keep the service — you can accept or decline. Once you confirm the cancellation, the representative will give you a confirmation number and tell you the exact date your service ends. Write down the confirmation number; keep it in case you need to reference the cancellation later.

The phone line is open during business hours. If you reach a busy signal, try again in a few minutes or call during off-peak times (early morning or late evening).

Cancelling through your OnStar online account

Go to onstar.com and log in with your username and password. If you do not remember your login, click "Forgot your password" and follow the email recovery steps. Once you are logged in, look for a section labeled "Account" or "Subscription" — the exact name varies depending on your account type.

Find the option to manage or cancel your subscription. Click it and follow the prompts to confirm cancellation. You will see a final confirmation screen with your cancellation date. Take a screenshot or write down the confirmation number shown on that screen.

Online cancellation usually takes effect within 24 hours. If your service does not stop by the date shown, call customer service with your confirmation number to verify the cancellation went through.

Cancelling by mail

Write a letter to OnStar requesting cancellation of your subscription. Include your full name, VIN, account number, and the date you want the cancellation to take effect. Keep the letter brief and clear — one paragraph is enough.

Mail it to OnStar's customer service address. You can find the current mailing address on the OnStar website or on your most recent bill. Send it via certified mail with return receipt if you want proof of delivery; regular mail works but takes longer to process.

Mail cancellation typically takes 5 to 10 business days to process. Your service may continue during this time, so you may see one more charge on your next billing cycle. Contact OnStar after 10 days if your service has not stopped.

What happens to your OnStar service after cancellation

Your vehicle will no longer have access to OnStar features like emergency calling, roadside information, remote lock/unlock, or vehicle diagnostics. If your vehicle has a built-in OnStar system (rather than a separate device), the hardware remains in the car but will not function without an active subscription.

You can reactivate OnStar at any time by calling customer service or logging into your account online. Reactivation usually takes effect within 24 hours. Your old account information will still be on file, so you do not have to create a new account.

Refunds and final billing after cancellation

If you have paid for service you will not use, OnStar may refund the unused portion. The amount depends on your plan type and how much time remains on your current billing cycle. Some plans offer prorated refunds (you get back a portion of what you paid); others do not refund partial months.

Check your confirmation email or account dashboard after cancellation to see if a refund is being processed. Refunds typically appear in your original payment method within 5 to 10 business days. If you do not see a refund after two weeks, call customer service with your confirmation number and ask about it.

Your final bill will show the cancellation date and any refund applied. You should not see any charges after the cancellation date.

If you cannot reach OnStar or cancellation is not going through

If the phone line is consistently busy, try calling during different times of day or use the online cancellation method instead. If online cancellation shows an error, clear your browser cache and try again, or switch to a different web browser.

If you have cancelled but your service is still active after the stated cancellation date, call 1-888-466-7827 again with your confirmation number. A representative can manually verify the cancellation in the system and push it through if it did not process the first time.

If you are having trouble accessing your online account, use the "Forgot your password" link to reset it. If that does not work, call customer service and ask them to help you regain access so you can cancel online.

Frequently Asked Questions

Will I be charged a fee to cancel OnStar?

No. OnStar does not charge an early termination fee or cancellation fee. You can cancel at any time without penalty. You may owe charges through your current billing date, but nothing beyond that.

Can I cancel OnStar if I still owe money on my vehicle?

Yes. Your OnStar subscription is separate from your vehicle loan or lease. Cancelling OnStar does not affect your financing. If your vehicle is leased, check your lease agreement to see if OnStar is required; some leases include it as part of the deal.

What if I cancel and then want OnStar back?

You can reactivate your subscription by calling 1-888-466-7827 or logging into your account online. Your old account and vehicle information will still be there. Reactivation usually takes 24 hours.

Will cancelling OnStar affect my vehicle's other features?

No. Cancelling OnStar only removes OnStar-specific features like emergency calling and remote services. Your vehicle's regular functions, navigation system, and other built-in features will work normally.

How long does it take for OnStar to stop working after I cancel?

If you cancel by phone or online, service typically stops within 24 hours. If you cancel by mail, it takes 5 to 10 business days. You will receive a confirmation with the exact date your service ends.