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2015 GMC Yukon XL - Blank screen

The main screen on my 2015 Yucon XL went blank. What do I do?

Take it in. Still under warranty?

I have had this happen in test cars as I tried to do things in the settings. If you have not already read the manual on screen settings and how to turn a blank screen back on, worth doing. Otherwise, I agree with Purebred