[ChevyGuy]

I'm not sure what to suggest to look at other than power in general. The MyLink I've looked inside have 5V and 3.3V regulators and I found the capacitors weren't as healthy as I'd like. So at some point we may see power problems with the radio itself. Much like a power supply going south on a desktop.

I have no idea if that's the problem with your unit or not.

 

[ChevyGuy]

With the navigation messed up, the car didn't know it was at the dealer.