Cancel your OnStar subscription by mail
Directly with OnStar, the way to cancel is: Online, in-vehicle blue button, or phone. Notice rule: Cancel any time; use remaining paid term.
Let Postbye cancel OnStar for you
We write your letter, mail it by certified mail the next business day, and confirm when the cancellation went through. You keep the signed proof.
Money-back guarantee within 10 business days.
Postbye is not affiliated with OnStar.
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- Certified mail with tracking
- Mailed every business day
- Delivery proof sent to you
- We confirm your cancellation
How to cancel OnStar by mail
Gather your account details
Have your member number, the name on the membership and the renewal date shown on your latest invoice to hand. The details in the letter need to match what OnStar has on file.
Write your request
State plainly that you want the OnStar account cancelled, further charges stopped and a written confirmation sent to you. Postbye sets this out in a ready English template (“Subject: Subscription termination – OnStar”).
Mail it with tracking
Use certified mail for the 48265 Detroit address in the next section, so the post office records the delivery. Write down the tracking number.
Keep the delivery receipt
It shows the date OnStar received your letter. Check your next statement: no OnStar charge should post after the cancellation date.
With Postbye, steps 2 to 4 take about two minutes of your time.
Where your OnStar cancellation letter goes
Written requests to OnStar go to 400 Renaissance Center, Detroit, MI 48265.
Detroit is in Michigan (ZIP 48265), a domestic address for certified mail within the United States.
Your name, address and email appear in a short block labelled Name, Address and E-mail, under the greeting “To Whom It May Concern,”.
Prefer to write it yourself? Use our letter template
Before you cancel OnStar, check these
Notice period: Cancel any time; use remaining paid term. Work out your cancellation deadline.
- No refunds for prepaid plans or plans included with a vehicle purchase or lease
- You can cancel by pushing the blue button or calling 1-888-4ONSTAR
Several states set rules for subscriptions that renew on their own. See what yours requires in automatic renewal laws by state.
Let Postbye cancel OnStar for you
We write your letter, mail it by certified mail the next business day, and confirm when the cancellation went through. You keep the signed proof.
Cancelling a membership
Memberships renew on the anniversary of joining and may be cancelled at a counter, online or in writing depending on the organisation, so a written request names the member number and the end date.
Putting the request in writing means there is a date on file for when you asked, which matters if a charge appears afterwards.
OnStar lets you cancel directly (online, in-vehicle blue button, or phone). A letter is the fallback that leaves a dated record when the direct route fails.
OnStar cancellation at a glance
- How OnStar accepts cancellations
- Online, in-vehicle blue button, or phone
- Mailing address on file
- OnStar 400 Renaissance Center Detroit, MI 48265
- Country
- United States
- Letter language
- English (template en)
- Phone
- 888-466-7827
- Category
- Memberships & clubs
- Verified on
