HOW TO USE DIAGNOSTIC ALERTS

To receive Diagnostic Alerts, you’ll need to have an active OnStar®* plan. After enrollment, Diagnostic Alerts will monitor many key vehicle systems and alert you of any potential issues detected based on your preferred method. You’ll also receive an alert if there’s an open recall on your vehicle.

Depending on your vehicle’s equipment, systems monitored may include (see charts below for full list):  

• Air bag system*
• Anti-lock brake system
• Critically low battery level
• Critically low oil life
• Electric drive unit (electric vehicles only)
• Emissions system 
• Engine and transmission systems
• Lithium-ion battery (electric vehicles only)
• Low Diesel Exhaust Fluid (DEF)
• Low or flat tire (excludes spare tire)
• OnStar® system 

To receive Diagnostic Alerts, you need to enroll in the service and choose to receive alerts by phone or email. You may have done this at the dealership, but if you haven’t, then follow the steps below to enroll.

1. Log into your GM Account online or in the vehicle mobile app.*
2. Navigate to the Vehicle Overview page (in the mobile app, tap the vehicle you want to set notifications for), scroll down and select Notification Settings.
3. Then, look for the Vehicle Diagnostics section under Communication Preferences. 
4. Within the vehicle diagnostic sections, you'll see the option to toggle Diagnostic Alerts on for email and/or text. Choose the notification method(s) that works best for you.
   —    Text message alert: With this option, you’ll receive a text message when an alert is triggered. Standard text messaging rates may apply.
   —    Email alert: With this option, alerts will be delivered to the email address on file in your GM Account. These real-time emails will be delivered in addition to the regular monthly diagnostics emails. 
5. After enrolling, you’ll receive a confirmation text or email confirming you’ve successfully signed up. 

• You’ll also receive an email each month with a summary of the health of key vehicle systems, even when no issues are detected. It includes mileage-based maintenance recommendations, such as tire rotation or spark plug replacement. 
  • This information is also available in your GM Account. 
• If you've designated a preferred dealer in your GM Account and opted into Dealer Maintenance Notifications, some of the alerts listed above will also be sent to your participating dealer. That way, if service is recommended, they can contact you to help you schedule an appointment. 
  • Dealer participation is required to receive dealer alerts.