My 2021 Chevy trail boss Bluetooth is undiscoverable, it worked fine one day then the next day it wouldn’t connect. I unpaired for hit forget device. Now the truck don’t even show up on mobile devices. I have connected via USB cord and the information systems just keeps saying retry. I have tried connect multiple different devices to no avail. When I go into phones and try and touch add phone it is grayed out. What can I do to fix this.