Better off ordering the SXP with the $795 Self Leveling Air Suspension. That's more tow worthy than just the tow hitch/self leveling suspension. The latter just fancier shocks that stiffen when loaded. Won't help rear sag. Kia does not make it clear they have two different leveling suspension products. Only can get air product on top model SXP and its $795. Other one comes w factory hitch.
And you are adding to the confusion. Telluride does not have air suspension. The $795 tow package includes a hitch and Nivromat shocks. They are not air suspension. See first part of this thread.

Self-Leveling Suspension
Does anyone have experience with the self-leveling suspension yet? Does it have benefits for those not towing but hauling lots of people? If you don't have it does the rear end sink with a lot of weight (cargo and/or passengers)?

Only the EX and SX can get the tow package with the Nivromat shocks. The LX and S trims can get the tow hitch only from factory (around $500)