thats great- where did you hear this info?Don't know about 2016 but there is no option to turn this off on my 2017 Yukon Denali - 2018 is unknown.
I should clarify my earlier comment. I have (had) a 2015 Yukon slt XL. It had no option. I have a 2016 SLT XL and it does have the option. I drove a 2017 Suburban as a rental a few weeks ago and it had the option. Perhaps Denali software is different. Or even different software within model years.