Sounds muted
 

I have a 2016 Buick Enclave Premium model. All sounds have been lost. radio, navigation, the connected phone and even the clicking sound from my turn signal. I have replaced the AMP fuse, checked for water in the door wells and even disconnected and reconnected the batter but have had no success. I am fearful that I will have to replace the Bose Amplifier. Has anyone had this problem? What would it cost to replace the Bose amplifier?