OnStar Vehicle Diagnostics

• What is OnStar Vehicle Diagnostics?

  OnStar Vehicle Diagnostics is an automatic diagnostic systems check and monthly report service, now available on most new GM vehicles. Once you sign up, OnStar can collect diagnostic information about your vehicle's key operating system about every 30 days while you drive. After each data collection, you'll receive a report and any scheduled maintenance alerts by email.

  See a sample of an OnStar Vehicle Diagnostics email report here.

• How do I enroll in OnStar Vehicle Diagnostics?

  To begin receiving your monthly diagnostic emails, simply enroll in OnStar Vehicle Diagnostics via our simple online process. Or you can push your vehicle's blue OnStar button at any time and an OnStar Advisor will enroll you.

• Is there any charge for OnStar Vehicle Diagnostics service?

  OnStar Vehicle Diagnostics is included in all OnStar subscription plans at no additional cost as long as you remain an OnStar subscriber. Please note that OnStar does not offer a separate OnStar Vehicle Diagnostics service plan.

• How can I tell if my vehicle is eligible for OnStar Vehicle Diagnostics?

  In most cases, your vehicle qualifies if it meets these conditions:

  • You have a 2004 model year or later GM vehicle with digital hardware.
  • Your vehicle is equipped with the GM Oil Life System.

  If you are still unsure, simply push your vehicle's blue OnStar button or call us at 1.888.4.ONSTAR (1.888.466.7827).

• How often will I receive an OnStar Vehicle Diagnostics email?

  Once you sign up, you'll receive an email report approximately every 30 days. However, your vehicle must be running in order to transmit data, so the exact timing will vary depending on your driving habits.

• How soon will I get my Vehicle Diagnostics email report after OnStar receives information from my vehicle?

  As soon as OnStar receives the data, your email will be automatically generated and sent to the email address you provided. Please keep in mind that OnStar cannot control how your email is handled by your own email provider. We recommend that you include the OnStar Vehicle Diagnostics email address in your Contacts or Favorites list, so your monthly email report won't be rejected or placed in the junk mail folder.

• How do I make sure that I receive my monthly OnStar Vehicle Diagnostic email?

  To make sure that you receive important information about your vehicle, please add vehiclediagnostics@onstar.com to your address book or safe list. Click here to find instructions for your specific email service provider.

• If I have more than one vehicle, can they all be covered by one email?

  At this time, each vehicle must be enrolled separately. You'll receive a separate email report for each one.

• Why do I need OnStar Vehicle Diagnostics if my vehicle has warning lights on the dashboard?

  OnStar diagnostics can detect some problems that won't light up a warning message on your dash. For example, you wouldn't know that your "Check Engine" light is defective unless OnStar or a mechanic tested it.

• Can I receive emails more often than every 30 days?

  Sorry — the system automatically schedules a transmission of data about every 30 days. But you can still get an OnStar remote diagnostics check anytime you need it. If your "Check Engine" light comes on, or you have any concerns about your vehicle, simply push the blue OnStar button. An Advisor can run GM Goodwrench On Demand Diagnostics and tell you if there's a serious problem.

• Will I receive OnStar Vehicle Diagnostics emails on the same day of the month?

  No. The system automatically receives data from your vehicle and sends you an email report about every 30 days, but not necessarily on the same day each month. Your OnStar Vehicle Diagnostics report can only be sent via email, it cannot be sent by postal mail. Please also note that we can only resend your most recent diagnostics report, not any prior reports.

• What if I change my email address?

  Be sure to let us know so we can continue your OnStar Vehicle Diagnostics service. Just press your blue OnStar button, provide the Advisor your PIN and ask to update your email address. Or you can call 1. 888.4.ONSTAR and follow the Vehicle Diagnostics voice prompts. Either way, it only takes a few minutes.