Connected Services

OnStar Advanced Diagnostics can help you find out exactly what auto maintenance or repair needs to be done on your vehicle.

Monthly Diagnostics1 is the easiest and most comprehensive way to get your vehicle’s information sent to you. They let you know the status of some key systems through a monthly Diagnostics Report or real-time Diagnostic Alerts — sent via email or text or through your myChevrolet®, myGMC®, myBuick®, or myCadillac® App2. Running a check on your engine, transmission, antilock brakes and other key systems helps you to know your vehicle is properly maintained and in top condition. Your vehicle can even notify your preferred dealer when it’s time for maintenance through Dealer Maintenance Notification1, and they can l contact you to set up an appointment. With a connected vehicle, you know more and worry less.



With a connected vehicle, Vehicle Diagnostics1 is a powerfully simple way to determine what’s going on under the hood. It offers peace of mind by checking in with you every month or in real-time to help make sure your vehicle is ready for the road. There are three major features:

1. Monthly Diagnostic Emails

  • Monthly Diagnostics Reports are included no charge as part of the vehicle’s standard connectivity. Owners can automatically receive an easy-to to-read monthly Diagnostic Report email with the results of checks of your engine, transmission, anti-lock brakes, and other key operating systems (enrollment required).
  • If you prefer, you can also be notified of your vehicle’s condition in real time by email or text or through your vehicle’s mobile app.
  • It's a consistent reminder of what's going on — specific to your vehicle — and what steps are involved in maintaining it.
  • Simple colour-coded icons make the report easy to review in seconds. A green icon next to a system means no issues were found. A yellow icon tells you action is suggested. And a red icon means you need to take action immediately.
  • It tells you when you're due for scheduled maintenance.
  • It also gives you information on your service plan, remaining Hands-Free Calling minutes, and unused data.

2. Ownership simplified with the app that puts the power in your hands

Control your vehicle on the go with the mobile app:

Download the myChevrolet, myBuick, myGMC, or myCadillac App2 and with the Remote Access3 plan you can use your smartphone to manage your vehicle’s features from wherever. Monitor your vehicle’s tire pressure, oil life, and fuel level; lock or unlock doors; remote-start the engine; or search for destinations and send directions to your vehicle’s navigation system — all from your smartphone.

The vehicle's mobile app is available for iPhone4 or Android.5


myChevrolet App
myBuick App
myGMC App
myCadillac App


myChevrolet App
myBuick App
myGMC App
myCadillac App

3. Maintenance Notification1

Time for a tire rotation? An oil change? A new air filter? You’ll always know because your vehicle can notify your preferred dealer when it’s time, and they can contact you to set up an appointment should maintenance be needed. Your vehicle is self diagnosing so you can enjoy the experience of driving. Maintenance notifications are at no charge with standard connectivity.

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