Be prepared for what’s ahead.

Protect your vehicle with a suite of diagnostic services—ready to help you diagnose and manage vehicle health and maintenance.

How to Access Diagnostics Services

Press Your Vehicle's Blue Button

  • Request an on-demand Diagnostics check

Diagnostics Report5

Every month, your vehicle can run a thorough check of its engine, transmission, antilock brakes and more, and email you the results. If you want to run a diagnostic check when you’re behind the wheel, just ask an Advisor to run one for you.

Dealer Maintenance Notification

Is it time for an oil change? A 60,000-mile checkup? You’ll always know because your car will email your diagnostics report to the dealer when it’s time, and the dealer will contact you to set up a service appointment.

Proactive and Diagnostic Alerts30

Take the guesswork out of day-to-day vehicle maintenance with Proactive and Diagnostic Alerts. Proactive Alerts advise of any upcoming service needs, while Diagnostic Alerts inform you of any immediate vehicle issues. You can also enroll to receive notifications any time an alert occurs.

Proactive & Diagnostic Alert notifications are available for most vehicles 2014 and newer. Check your vehicle capability here.

Proactive Alert Notifications

Proactive Alert notifications are available for the following vehicles:

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Capabilities vary by model. Visit onstar.com for details and system limitations. Message and data rates may apply. Requires an active OnStar service, email address on file and enrollment in Advanced Diagnostics. Proactive Alerts are designed to help predict specific types of issues based on information collected from the vehicle. Other factors may affect vehicle performance. Not all issues will deliver alerts. In certain scenarios, a dealer service check may be required to confirm the accuracy of the Proactive Alerts.

Proactive Alert notifications are not available for the above selected

Diagnostic Alert Notifications

Diagnostic Alert notifications are available for the following vehicles:

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