2017 Volt MyLink Issues

In the past two weeks, two new issues have appeared with the MyLink in my Volt:

1. CarPlay and the whole head unit have started to crash and restart. This isn’t the usual CarPlay crash where just CarPlay on the iPhone crashes, this is where the screen in the Volt goes completely black for about 10 seconds and then boots back up. Additionally, after these crashes, the two USB ports in the front stop supplying power. To get them back on again (and to get CarPlay to work again) I have to go turn the car off and open the door and wait a minute or two before powering it back on.

2. The projection button is totally missing from the interface. In its place is the OnStar NAV icon. I’ve done a long press on the icons to try and see if the projection icon is hidden or something of that nature, but it’s nowhere to be found. The only way to get to the CarPlay interface is to hold down the home button until CarPlay appears.

Has anyone seen this issue before? Any idea what might be failing? It of course started happening about 200 miles past 36,000 miles, so I’m trying to diagnose it as much as I can before taking it to the dealer for a potentially hefty fee.

UPDATE: I went for a 20 minute drive to the grocery store today and MyLink crashed over and over again, even without my iPhone plugged in. Eventually after one of the crashes it didn’t boot. All it says on the screen now is “Calibrate Device” in red letters.

UPDATE2: had my battery tested at two different auto shops and both of their testers said it was good. That was two days ago. Today the car turns on and runs fine but MyLink doesn’t power on at all. Just totally black. The USB ports are all dead as well. I have an appointment to bring it into the dealer next Thursday. Will update the post after they diagnose it.

UPDATE3: according to the dealer it’s the HMI or Human Machine Interface module that’s dead. Total cost with parts and labor is $1057. I bought an extended warranty that should cover it so we’ll see.