OnStar Vehicle Diagnostics makes it as easy as checking your email¹. Every month, it runs a thorough check of your engine, transmission, antilock brakes and more, so you know your vehicle's key systems are good to go. It also checks your tire pressure, which can help maximize your fuel economy, and your oil life so you only need to change your oil when it's time. If you want a diagnostics check between emails, just push the OnStar button, and an Advisor can run a check while you're driving. That's peace of mind, when you need it.

Key Benefits OnStar Vehicle Diagnostics is a powerfully simple way to know what your vehicle's key operating systems need. It offers peace of mind by checking in with you every month to help make sure your vehicle is ready for the road. There are two features:

• A monthly email report
  • Every month it automatically sends you an email with the results of hundreds of checks of your engine, transmission, antilock brakes and more
  • It's a consistent reminder of what's going on — specific to your vehicle — and what steps are involved in maintaining it
  • Simple color-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
  • If your vehicle is equipped, the Tire Pressure Monitoring System helps you manage your vehicle's tire pressure. It lets you know if your tires are properly inflated, which can save you over $80 a year² on gas
  • The Engine Oil Life System tells you exactly when to change your oil based on how you drive, you could save over $30 a year² by following the alerts in the email
  • It also tells you when you're due for scheduled maintenance
  • You could save over $100 a year² by following oil-life and tire pressure alerts in the email
  • It's available at no extra charge. Just push the blue button or visit onstar.com to sign up
  • It also gives you the status of your OnStar subscription and profile, Hands-Free Calling minutes, and Turn-by-Turn Navigation
• On-Demand Diagnostics
  • If you have a concern while you're driving and want OnStar to run a diagnostics check, just push the blue OnStar button. An Advisor can run an On-Demand Diagnostics check while you're driving

Visit OnStar.com for more diagnostic details