Where to send your OnStar cancellation letter
Read the addresses on this page next to the full guide to cancelling OnStar.
The addresses we hold
If you are writing to OnStar, this is the page with the address on it: Detroit, 48265, plus what to write on the envelope and how to prove it arrived.
Where the letter goesMailing address
OnStar400 Renaissance CenterDetroit, MI 48265Michigan, ZIP 48265: where mail for OnStar is delivered.
How to address the envelope
Write the address as printed
Address the envelope to 400 Renaissance Center, Detroit, MI 48265. Everything on those lines matters for the sorting machines, so nothing is abbreviated by hand.
Put your own address on it
Your name and postal address go top-left on the front (or the back flap). If the letter cannot be delivered it comes back to you, which is itself evidence of the attempt.
Buy the certified service
Ask at the counter for the certified service with a return receipt: the fee is on top of the postage, the receipt is postmarked, and the article number traces the delivery.
Keep the proof together
Your copy of the letter, the mailing receipt and the tracking record belong together in one file, especially with the notice rule: Cancel any time; use remaining paid term.
The letter, written out
The request itself is short: OnStar is asked to end the account, stop the charges and confirm in writing, with your member number, the name on the membership and the renewal date shown on your latest invoice where the brackets are.
[Your name] [Your street address] [City, State ZIP] [Your email address]
[Date]
OnStar 400 Renaissance Center Detroit, MI 48265
To whom it may concern,
I am cancelling my account with OnStar, account or member number [number], with effect from [date or "immediately"]. Please end every add-on and linked plan on this account at the same time.
I am giving notice under my agreement: Cancel any time; use remaining paid term.
Please stop all future charges to my payment method, remove my stored payment details, and send written confirmation of the cancellation and its effective date to [your email address].
Sincerely, [Signature] [Your printed name]
Keep reading
The full guide to cancelling this company, our letter template and the postal guides.
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.