Hi,
There was a technical service bulletin (TSB) put out related to the inability to change volume or staying muted along with other things. The TSB indicates that the radio need to be reprogrammed. A dealer is most likely where you will need to go because of software issues. Take a look at the three pics below. They explain what some of the issues are related to the TSB.
In pic 4, I just highlighted the muted indication.
Take a look through the TSB I attached and let me know if it helps.
Joe
Images (Click to make bigger)
SPONSORED LINKS
Monday, April 13th, 2020 AT 4:39 PM