Guardian App Support
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Vehicle Mobile App Support
Find FAQ's and support for MyBrand appOnStar Support Topics from OnStar Subscribers
MyGMC Trailer Light Test
My GMC trailer light test functionality appears to have been removed or lost in the most recent update of the app - March 2025. I use this feature frequently. I called OnStar support today 3/9/2025 and they seemed confused regarding this trailer light testing feature. How do I get this trailer light test functionality restored in the app?MyChevrolet app vehicle diagnostics not working
The vehicle diagnostics stopped working after three months on my new 2025 Silverado. I have OnStar Basic and Connected Access plans good through Oct 2032. The connected access provides “standard connectivity for your vehicle – including Vehicle Diagnostics and Dealer Maintenance Notifications”. I received monthly vehicle diagnostics reports in November, December, and January. No email was received in February. The last update date reported in the app for the vehicle diagnostics is 1/26/2025, precisely one day before my three month trial of Safety and Security ended. So far, the app vehicle controls are working fine. I deleted and reinstalled the mobile app. I also logged out and logged back into the MyChevrolet app in the infotainment system just in case. I have started and driven the vehicle multiple times since Jan 26.My Cadillac App will not Update a
My Cadillac App will not Update and OnStar cannot connect (even though green light is on). Technical support never calls back. They have no answer. What the heck are they doing? Did anyone have any success getting this lack of communication with the car fixed?I see lot's of complaints with no resolutions?2024 Cadillac Lyriq No Longer Works w/ MyCadillac App or OnStar
I have a 2024 Cadillac Lyriq that has stopped communicating with the MyCadillac app. The remote start features no longer work. OnStar is not working correctly either. I have tried a soft reboot of the infotainment. I have tried a hard reboot by disconnecting the 12v battery. I have tried uninstalling and reinstalling the MyCadillac App. I contacted OnStar and they said they would escalate to level 2 support - but no one has gotten back to me. You can see in the app that it hasn’t successfully communicated with the car in 6 days. What are other things I can do? I feel helpless and without any support. It’s deeply disappointing having a 2 year lease on an expensive vehicle that is less than 3 months old and doesn’t work as advertised.Vehicle Status is Broken
The vehicle status feature of the myChevrolet app is broken and has been for the 8 years I’ve owned my Volt. It rarely ever works. The remote lock/unlock and start functions work reliably, so clearly the app is communicating with my car through OnStar. BUT, when it comes to fetching my vehicle status so I can see things like my current charge state, the app throws error, after error, after error. If I’m stubborn enough to just sit here and refresh ad nauseam, eventually an update may come through. Please do not tell me to reinstall the app, restart my car, or any other nonsense. This is a problem with the app and OnStar that will not be fixed by consumers mucking around on their devices. I have little faith that after 8 years of this function being broken that OnStar will ever fix it, which is why I’ll be letting my service expire later this year. Really, I should demand my money back for these last two years of service, considering a primary function of the ‘remote access’ plan I have rarely ever works. The attached photo shows the many failed attempts I just made to refresh my vehicle status. In this case, it took 8 tries before the app finally pulled data from my car. This is just ridiculous.After service tow reimbursement
My car broke down. Before I could make any arrangements the business I was at had the car towed away. I want to send OnStar Guardian the bill for reimbursement, which an advisor said I could do. However, I can't find any information on how to do that. I tried using the online chat and they couldn't answer me. If a vehicle is disabled and it is towed by a business who just wants the car off their property or the car is obstructing others, or if I'm stuck on the road and the police call to have it towed because it's unsafe to other drivers, how do I submit a claim to OnStar Guardian for reimbursement?My Cadillac App failing to Remote Start
for the past three weeks. My Cadillac app has not allowed me to remote start, lock or unlock my car. I have been on the phone with Onstar around 20 times and spent more than 30 hours dealing with this issue. I uninstalled and reinstalled the app. I’ve called Onstar from my car and opened up two cases, and yet nothing has been corrected . It also doesn’t show me any other statistics for my car. I pay for the essentials plan, which includes this, and unable to use it for the past three weeks. the dealership says it’s not their issue and they wouldn’t be able to fix it so I’m at the mercy of the Onstar team who still hasn’t figured out what’s going on. Does anyone have this problem? what’s the solution?App not connected to ONSTAR services
Hello, I recently purchased a 2022 GMC Sierra with the new infotainment system. In 3 short weeks my truck ate throw 3GB, I called ONSTAR for support and they blamed me. Apparently, my phone used all my data. The first girl said they have tools to figure out what used the data from the truck but I needed to call tech support. A few days later I call tech support to be told they don’t have tools to diagnose where the data was used and it was all my phone. 3GB gone and not a single app used on the truck. Then, I try to set up myGMC to my app to use the remote start. It tells me that my truck is not connected to ONSTAR services and to press the blue button, so I did. Just to be told the truck is activated and there shouldn’t be an issue. Over an hour on the phone and logged into the website numerous times, through every single page and nothing. The GMC website literally says my truck is NOT connected to ONSTAR services and there’s no place to link my account. When I try to activate ONSTAR on the website it says there’s an error and to call. How am I supposed to use the remote services when the my.gmc.ca says my truck doesn’t have ONSTAR activated, but ONSTAR is saying it is activated!?? Tell my why I’m paying for services that I can’t even use?
