We sold our '17 Land Rover Discovery HSE with air leveling, because we needed something larger. Test drove almost every late model SUV we could find that had an active air ride suspension and settled on our '21 Yukon Denali. The ride difference is remarkable. We have a 5th wheel RV and a car hauler trailer (normally towed by my Ram 3500). I hooked the car hauler up to the Yukon (to test out the pull) and the SUV continued to provide a great, smooth ride.
The thread, above this one, from Justin is a good reference. However, the Service Manager at the dealership where we bought the Denali, is a teammate of mine on our rugby team, so I trust him. That being said - he told me that he has had only one 2021 Tahoe come in with the "Service Leveling System". His team of techs were baffled as well, because GM could not provide a solution other than to replace the DCM. They, too, tried the "remove the negative battery cable for 60 seconds" solution on the Tahoe. It would reset, but came back after a while. The DCM replacement fixed it...according to my buddy at the dealership.
Kinda long-winded reply for the OP, but all-in-all...I would not settle for any other iteration of the Yukon (or Tahoe). I love the air ride suspension on ours! Get it!