If you need help with an OnStar subscription, vehicle connection, roadside assistance, billing charge, cancellation, Wi-Fi hotspot, Guardian app, or account access issue, start with the correct OnStar support route. OnStar support can involve your vehicle, your GM account, your payment method, and in some cases emergency or location-based services, so it is important to contact OnStar directly and avoid posting private account details online.
OnStar Customer Service Phone Number and Support
OnStar lists its main customer service phone number as 1-888-466-7827, also written as 1-888-4ONSTAR. Members can also press the blue OnStar button inside an equipped vehicle to speak with an Advisor.
- OnStar customer service phone number: 1-888-466-7827
- TTY for hearing or speech impaired customers: 1-877-248-2080
- Online support: OnStar Support
- Contact page: OnStar Contact Us
- Report an issue: Report an OnStar Service Issue
- Mailing address: OnStar Member Services, P.O. Box 1027, Warren, MI 48090-1027
OnStar also offers online chat, support articles, community help, and account tools through its official website. Emergency, crash, stolen vehicle, and roadside features should be handled through the blue OnStar button or the official OnStar customer service number whenever immediate help is needed.
Choose the Correct Support Route
Using the right support route can save time, especially if your issue involves your vehicle, subscription, payment method, or app access.
- Emergency or crash support: Press the red emergency button in an equipped vehicle if available, or call emergency services directly if you are in immediate danger.
- Roadside assistance: Use the blue OnStar button or call 1-888-466-7827 and follow the prompts for roadside help.
- Billing, renewal, or payment issue: Sign in to your OnStar or GM account, review your plan and payment history, then contact OnStar if a charge looks wrong.
- Cancel or change a plan: Use your online account when available, push the blue OnStar button, or call OnStar to speak with an Advisor.
- Vehicle app, remote commands, or Wi-Fi issue: Use the OnStar support center or submit a support request if the issue is not urgent.
- Service complaint: Use OnStar’s report-an-issue page or call the main OnStar customer service phone number for faster help.
What to Have Ready Before Contacting OnStar
Before calling OnStar customer service, gather the information that can help the Advisor find your account and route the issue correctly.
- Your name and contact information on the account
- Your OnStar account email or GM account login email
- Your vehicle make, model, and year
- Your VIN, if requested by OnStar
- Your OnStar account number, if available
- Your vehicle location if you need roadside, unlock, or stolen vehicle assistance
- The date and amount of any billing charge in dispute
- Screenshots or confirmation numbers for online account, app, or cancellation issues
- Any case number, ticket number, or Advisor notes from prior contacts
Common Reasons Customers Contact OnStar
- Questions about OnStar plans, trials, renewals, or pricing
- Canceling an OnStar subscription
- Unexpected monthly charges or duplicate billing
- Updating a credit card or payment method
- Getting help with the blue OnStar button
- Roadside assistance, towing, lockout, flat tire, or fuel assistance
- Stolen vehicle assistance or vehicle location concerns
- OnStar Guardian app support
- Remote start, remote lock, unlock, or mobile app commands not working
- In-vehicle Wi-Fi hotspot or data plan issues
- Vehicle diagnostics, connected services, or software update questions
Billing, Charges, and Refund Help
If you see an OnStar charge you do not recognize, sign in to your OnStar or GM account and review your plan, payment history, trial status, and renewal settings. OnStar services may be billed monthly, annually, or as part of a multiyear service plan depending on the plan and vehicle purchase terms.
When disputing a billing issue, write down the charge date, amount, card used, and any plan name shown in your account. Ask the Advisor to confirm whether the charge is tied to a trial conversion, auto renewal, data plan, Guardian app plan, or another connected service. If you cancel, ask when service ends and whether any prorated refund applies to your situation.
Canceling or Changing an OnStar Plan
OnStar says customers can cancel or change plans through the online account when available, by pressing the blue OnStar button, or by calling 1-888-466-7827. If you no longer own or have access to the vehicle connected to the plan, call OnStar directly so the account can be reviewed.
Before canceling, ask whether your services end immediately or at the end of the current billing period. If your vehicle was sold, traded, totaled, repossessed, or transferred to another driver, make sure OnStar removes the vehicle from your account and stops any active paid plan tied to that vehicle.
Roadside Assistance, Unlocks, and Emergency Help
For roadside assistance, lockouts, flat tires, towing, or similar vehicle problems, use the blue OnStar button when available or call the OnStar customer service phone number. If there is a medical, fire, police, crash, or immediate safety emergency, contact emergency services directly or use the vehicle’s emergency button if equipped and safe to do so.
For vehicle unlock or roadside requests, OnStar may need to confirm your identity and account authorization before taking action. Have your account information, vehicle details, and exact vehicle location ready.
App, Wi-Fi, and Connected Service Problems
If your OnStar mobile app, Guardian app, remote commands, vehicle Wi-Fi, or connected service is not working, start by checking your account status, active plan, phone connection, vehicle compatibility, and whether your vehicle is in an area with coverage. If the issue continues, use the OnStar support center or report-an-issue form.
For app problems, note the device type, app version, error message, date the issue started, and whether the problem happens on cellular data, Wi-Fi, or both. For in-vehicle Wi-Fi, ask whether the issue is with the OnStar plan, the vehicle hardware, data plan billing, or network coverage.
Scam and Privacy Warnings for OnStar Customers
Be careful with calls, texts, emails, or online posts claiming to be OnStar support. Do not share your full VIN, account PIN, password, payment card number, location history, or remote vehicle access information with anyone unless you are using an official OnStar route.
- Use the official OnStar website or the phone number listed above.
- Do not post your VIN, license plate, home address, account number, or phone number in public reviews.
- Be cautious of anyone offering to unlock, track, locate, or disable a vehicle outside official OnStar channels.
- If you think your account was accessed without permission, change your GM account password and contact OnStar directly.
How to Escalate an OnStar Complaint
If your issue is not resolved during the first contact, ask for a case number and request escalation to a supervisor or specialist team. Keep a written timeline of call dates, Advisor names if provided, ticket numbers, promised callbacks, billing adjustments, and cancellation confirmations.
If the issue involves a new vehicle purchase, trial plan promise, connected service failure, or dealer-provided information, contact the selling Chevrolet, Buick, GMC, or Cadillac dealer as well. For unresolved billing issues, keep copies of account screenshots, cancellation confirmations, and card statements before contacting your credit card company.
OnStar Reviews and Complaints on CustomerServiceNumbers.com
CustomerServiceNumbers.com currently does not have enough published OnStar reviews to summarize a clear customer trend. The live review section shows 0 reviews, so readers are encouraged to share their own OnStar customer service experience below.
When leaving a review, focus on what happened, how you contacted OnStar, whether the issue was resolved, and how long it took. Do not include private information such as your VIN, account number, phone number, payment details, vehicle location, license plate, or home address.
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- Share Broader Service Reviews on ZeroStars.org
Page Update Note
This OnStar customer service page was updated on June 25, 2026 to reflect current support routes, including the main OnStar customer service phone number, TTY number, online support, report-an-issue option, cancellation help, billing guidance, and privacy warnings. CustomerServiceNumbers.com is independent and is not affiliated with OnStar or General Motors.
Why Trust CustomerServiceNumbers.com?
CustomerServiceNumbers.com has helped consumers find customer service phone numbers, company contact details, and review information since 2004. CSN is an independent consumer-help site and is not owned by OnStar, General Motors, or any company listed on this website.
Our goal is to help readers find official support routes, compare service experiences, and share reviews that may help other consumers. Always verify account-specific details directly with the company before making billing, cancellation, safety, or vehicle-service decisions.
Share Your OnStar Customer Service Experience
Have you contacted OnStar about billing, cancellation, roadside assistance, app access, Wi-Fi, emergency services, or another issue? Share your experience below to help other customers understand what to expect.
Privacy reminder: Do not post your VIN, OnStar account number, phone number, email address, home address, license plate, payment information, location details, or any other private information in a public review.
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CustomerServiceNumbers.com is not affiliated with OnStar or General Motors. This page is for informational and consumer-review purposes only. Phone numbers, support links, policies, and service options can change, so always confirm important details directly with OnStar before taking action.
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