our 21 AT4 had air ride on it and even though it was still operating when we sold it, it just felt like it was going to be an issue at some point...especially after it was in the shop 17x over the course of 11 months. We sold it with 40k+ miles on it this spring and the constant up/down at "every" stop was getting a little old. We went back with a more basic Tahoe that wasn't as tech/option heavy