My biggest disappointment - No Central Tire Inflation Sys (CTIS). Hummer H1 have always had them. Sweet to adjust air from the cockpit when in mud or water. All that air is already available on the CT.
I enjoy CTIS on my 97 Hummer H1. Especially in sand, mud and water. I can adjust while driving too - even at 50mph. I hope it will be available on my CT. I have had issues with leaks in the past, but eventually found a shop that resolved them 4 years ago. I agree with the earlier option...