Text Issues On Mylink
What you need to do to get the text working is on your I Phone go to the bluetooth then go to the area where it shows the different devices you have connected (On your I Phone) then where it shows your Tahoe Connection hit the letter i on the far right side where you would normally go to "Forget this Device" area then you will see an option to (allow notifications) turn that on and you will be Golden.
I sat in my Tahoe LTZ with an Infotainment Guru from Chevrolet for an hour and learned all kinds of cool stuff !
Good Luck
Tahoe Lover !