Guardian App Support
Get your Guardian questions answered and help fellow Guardian users
Vehicle Mobile App Support
Find FAQ's and support for MyBrand app
Mobile App Support Topics from OnStar Subscribers
Remote start stopping after 5 minutes when using the mobile app
Hello,Owner of an Equinox EV 2025. Last visit at the dealer they did a BMC update on my car to fix some issues. Since the update, whenever I remote start my equinox EV with the mychevrolet app (on Android), the car shuts down after 5 minutes. I see t...
Family Sharing
I’m trying to use family sharing in the MyChevy app. I added the required information and it sent an email as it should. When my family member clicks the link and logs in with the same email, they are unable to get past an “add vehicle” page to join ...
MyChevy / MyGMC does not update Fuel, Trip, or Diagnostics
I have a 2019 Chevy Colorado with an active OnStar Remote Connection plan. Initially, everything worked perfectly, but two weeks ago, all diagnostics, fuel level, and trip data stopped updating. However, the map and remote functions continue to work ...
Cadillac XT4 2019 Radio Issues
Hello,Has anyone else encountered the following issues with 2019 XT4 (Premium Luxury)?:-In-Vehicle Music app stops working when setting favorites through MyCadillac App (iOS). App will not open causing the radio to crash.-CUE system resets when temps...
App stopped updating for 2024 blazer
l had an issue with my app after an oil change it stopped updating the vehicle data I made some calls to dealer and onstar technical support and they were able to resolve the issue somtimes a little patience and kindness on the phone can make a big d...
MyChevy App wont remote start/ won't update
This problem has been going on for months. I have deleted and reinstalled the app numerous times which still did not work. Need someone's help with this issue.
Unable to update
On the app for my corvette it says “unable to update. Refresh or try again later”. I have tried to refresher, sign in and out, and still not working. What route should I go now?
Mobile App
The mobile App no longer works to start my car. I've made sure all the doors, hood, and tailgate are closed. I deleted and reinstalled the app. I restarted my phone. No check engine lights and the app version that I am working off of is 7.3.0 build 3...
Server connect issues
My 2024 Chevy trax will not connect to on star, the on star lights are not on in the vehicle and when u push them nothing happens. The mileage and tire pressure show from 2 weeks ago. My account is active and I have uninstalled the app and reinstalle...
2025 Silverado app not updating status
Have had a 2025 Silverado TB sense Christmas and my Vehicle status has not update in two weeks have tried reinstalling app, signing out and back in. Power cycling the truck and nothing
