MyGMC app Not Worked From New

Question

I bought a 2025 Yukon Denali on 7/1/25 and have been unable to get the MyGMC app to work. In that time, I pressed the OnStar button, called various phone numbers more than 13 times and racked up 8 Case numbers to no avail. All the people I have talked to can do no more than ask me to repeat their canned troubleshooting process and then say I will get a call back from a Support Technician. I got a call back once and they could only offer the same repeated steps to reset, login, delete/reinstall app, etc.

This is the same when using my SE 2020 iPhone and my wife’s SE2022 and I believe there is something corrupt in my regular GMC account. People on the phone claim this issue has been escalated but I am now out of anything on my end I know of to have this fixed.

Can other members offer alternative suggestions to get this working? Perhaps another phone number, email address, or posted letter?

Thank you, Mike

advisor_jack · Answer

Our team regrets to hear that you've been dealing with these unfortunate concerns with the myGMC app, @Moxon. We understand how frustrating these difficulties can be and appreciates you bringing this matter directly to our attention. At the moment, our team can see that our senior technicians are working hard to identify the cause of this concern as well as the best resolution. As soon as they have further insight to share, they'll be sure to reach out to you directly. If you should not receive any communication, please don't hesitate to follow up with us here for more support. We're only ever a message away.&nbsp;