Your experience with your Denali is unfortunate, I can't say I have shared anything close to your experience with my 2015 Yukon Denali XL. I can't help but to think there's more to the story here.
OP registered Monday, made 1 post (this one) on Monday, this thread has received a few comments, feedback, clarifying questions, etc. from our experienced members and zero reply or response from OP.
Maybe OP meant to register and post a review on consumer reports? Edmonds?
I've never once been on a car forum that was filled with so many posts that read as if they should be posted on consumer reports, Edmonds, or the like. How about asking the experienced forum for help, input, or guidance? No it's just a single post to ***** complain and roll out. Since when have car/truck enthusiast forums become the place for that?