You already know OnStar provides Turn by Turn Navigation, Hands-Free Calling, and Automatic Crash Response as well as Emergency & Security services.

But did you also know that you can get OnStar Vehicle Diagnostics  for your particular vehicle - based on your own driving habits? That means on-demand checks, recall reminders, and updates about your vehicle's maintenance, no charge!

Imagine getting a monthly e-mail report about your vehicle's key operating systems! 

You stay informed and aware of any Goodwrench Diagnostic Information,  specifically for your vehicle.