OnStar Vehicle Diagnostics

• What is OnStar Vehicle Diagnostics?

  OnStar Vehicle Diagnostics is a simple and powerful tool to assess your vehicle’s key operating systems needs. OnStar Vehicle Diagnostics includes:

  1. A regular monthly e-mail report – every month your vehicle automatically sends you an e-mail with the results of hundreds of checks of your engine, transmission, antilock brakes, and more. It’s a customized report about the condition of your vehicle and recommended actions to ensure proper maintenance.
  2. On-Demand Diagnostics – if you have an immediate concern while driving, just push the blue OnStar button. An advisor can run an On-Demand Diagnostic check while you are driving.

  See a sample of an OnStar Vehicle Diagnostics e-mail report here.

• How do I enroll in OnStar Vehicle Diagnostics?

  To begin receiving your monthly diagnostic e-mails, 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
  • Your vehicle is equipped with the GM Oil Life System

  If you are still unsure, call us at 1.888.4.OnStar (1.888.466.7827) or push your blue OnStar button and an OnStar advisor will be happy to help you.

• How often will I receive an OnStar Vehicle Diagnostics e-mail?

  Once you sign up, you'll receive an e-mail 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 e-mail report after OnStar receives information from my vehicle?

  As soon as OnStar receives the data, your e-mail will be generated automatically and sent to the e-mail address you provided. Please keep in mind that OnStar cannot control how your e-mail is handled by your own e-mail provider.

• How do I make sure that I receive my monthly OnStar Vehicle Diagnostic e-mail?

  In order to ensure that you always receive your OnStar Vehicle Diagnostics report, we recommend that you add vehiclediagnostics@onstar.com as a contact in your address book. Click here to find instructions for your specific e-mail service provider.

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

  At this time, each vehicle must be enrolled separately. You'll receive a separate e-mail report for each one. We recommend that you add the OnStar Vehicle Diagnostics e-mail address to your address book or as a contact, so your monthly e-mail report won't be rejected or placed in the junk mail folder.

  OnStar can send a Vehicle Diagnostics Report to multiple e-mail addresses. If you share your GM vehicle with other drivers, this is a great way to ensure everyone is up-to-date on your vehicle’s maintenance. You can add additional e-mail addresses to your account by contacting your Onstar Advisor.

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

  Each month your vehicle automatically runs hundreds of diagnostic checks of its key systems and can detect some problems that may not trigger a warning message on your dash. An OnStar Vehicle Diagnostics report provides you with a complete monthly review of your vehicle’s key systems. OnStar Vehicle Diagnostics can also help you optimize fuel economy and save money on oil changes. OnStar Vehicle Diagnostics lets you know exactly when to change your oil, which may not be every 4,800 km.

  No Extra Charge: OnStar Vehicle Diagnostics is included in your base OnStar subscription. Press your blue button to sign up.

• Can I receive e-mails more often than every 30 days?

  The system automatically schedules a transmission of data about every 30 days. But you can still get an OnStar 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 an On-Demand Diagnostics check and tell you if there is a maintenance issue that requires your attention.

• Will I receive OnStar Vehicle Diagnostics e-mails on the same day of the month?

  No. The system automatically receives data from your vehicle and sends you an e-mail report about every 30 days, but not necessarily on the same day each month. Your OnStar Vehicle Diagnostics report can only be sent via e-mail, 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 e-mail address?

  Contact OnStar at 1.888.4.ONSTAR and press “2” to update personal information. Please provide the Advisor with your PIN and ask to update your e-mail address. You can also press the blue OnStar button in your vehicle and ask an advisor to update your e-mail address. Either way, it only takes a few minutes.