Just wanted to start a thread for everyone to post any hidden diagnostic menus, tricks and tips they might've found for MyLink on their 2016 Volt.

I'll start:

If you want to switch to your CarPlay Home menu without pressing the CarPlay/Projection button from the MyLink Home Menu, just press and hold the Home button on your dash for 2 seconds and it'll take you directly to the CarPlay Home menu.

Cheers and Happy Hunting!