I also have a 2015 Tahoe LTZ
I also have a 2015 Tahoe LTZ with 21,000 miles on it. Still covered under warranty, so I'm now driving a courtesy car, Malibu. GM told me I am lucky to get a courtesy car as I should only be eligible for one for 3 days. I went nuts and asked shouldn't it be GM's problem since they don't have the part and it will only take a couple of hours to replace it? I said I'm the lucky one who paid 65 grand for a vehicle that I can't drive in Kansas heat? Screw you GM! You will never EVER get my business again. Sign me up for a class action!