I've had 3 Diesels for 3-6 and 16 years, (Jaguar, JEEP, Ram Cummins..) I've been thru 1st year pains, but my 6 year old JEEP GC is getting long in the tooth and over 100K. Waited long enough for the new JGC that just never shows up. Right now my Money is on a Denali if no Diesel upcharge or a lower grade Escalade of there is a 3K+ upcharge on GMC. My jeep had teething pains too the 1st year but settled in to be 30 MPG 600+ mile per tank comfortable vehicle. Had some quirks but overall has been great. I think I can survive a 1st year Denali or Esky, my dealers are close and and I have a 3rd vehicle if I need it in a pinch. I just have to wrap my mind around spending 83+K on any vehicle. In all reality I COULD drop 48K on a loaded Telluride, still get 95% of the features, seat the same amount of people, and keep 30+K in my pocket.