Good morning all,
I work in the Service Department at a GM Dealer. We have a customer with this same concern and as of April 20th, GM Technical Assistance made us change the radio and it failed.
As of May 7, 2021 they released a Document (PIT5839A) that describes your exact concern. It is currently under investigation by engineering looking for a permanent solution.
GM requires us to verify the radio software is version V135118 (the problem only occurs with that software). If so it is requiring you to perform a radio reset by selecting “Erase settings and personal data” under the “Restore to factory settings.”
They do inform us this may only be a temporary solution; thus GM looking for the root cause.
Will keep ya updated.
