I had a brand new 17 Tahoe, was in the dealer 29 times. Mostly for the same issue, a rattling passenger seat. Over a year and a half they threw every part at that vehicle, brought engineers in from MI and would do anything BUT replace my seat. New airbags, seat frame, air conditioner blowers, floor insulation and even new door hinges, what a genius engineer they brought out for that one.
Leather started rippling due to having been taken apart so many times, vehicle would be given back to me w/ empty gas tank and over 300 miles were put on it by the dealer, driving it to see if it was solved and it still rattled. I opened a case w/ corporate GM, I had to constantly call them, they were idiots and there was so much red tape to jump through. I couldn't take it anymore and about that time they told me the sound was 'normal' and they were closing my case, I sued them under the lemon law and won.
There is so much more I went through w/ them but their stupidity and lack of taking care of the customer was off the charts. I will never buy another GM product.
I bought a 18 Platinum Expi, been VERY happy w/it and in every way it feels and drives better than the Chevy. Unfortunately Ford is replacing my transmission now, w/11k miles on it. Clunks while downshifting to 3rd and a rebuild did not fix it. It stinks but much better service and effort to try to make it right than GM.
My brother is a police. officer and they have both Tahoes and Expi's and he said guys get to work early just to get the Expi so they dont have to drive the Tahoe LOL. He said he wont even try to chase someone in the Tahoe, that was classic.