You can find out how much data you have remaining with your myChevrolet, myBuick, myGMC or myCadillac Mobile App.* You can also visit your vehicle Owner Center and select Manage Wi-Fi Hotspot in the Quick Help section. Additionally, you can push the blue OnStar button and ask an Advisor.
* Mobile App available on Apple App Store and Android Play Store. Service availability, features and functionality vary by vehicle, device and the plan you are enrolled in.