New OnStar Module-2022 Sierra

[Nickolas Williams]

I have a 2022 Sierra Denali. Had a new OnStar communication interface module installed by the dealer today. GPS and OnStar functions work. However, the “MyGMC app” now doesn’t update and I can’t control/start/lock my truck with the app. I’ve uninstalled/installed the app, reset the settings in my truck and called OnStar. They seem the be clueless at this point. Any ideas? 

[Nickolas Williams]

Crisis avoided. I called OnStar by pushing the blue button in my truck instead of calling the support line, no idea if there’s a difference, but hitting the blue button was much more helpful today. I had read some else on this forum to tell/ask OnStar to make sure the Vin number is associated with the new module. The advisor sent a “new signal“ and said it had to be updated. Now my app works, everything seems to be fixed.

[Jsdirt]

I'd find another dealer. This is GM's problem, and they need to fix it on THEIR dime. 

[AmanSinghMal]

I have the same issue. But my truck needs a completely new module.