Yep (LTZ). With no air in the shocks, it rides better than stock.
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u SURE there is no air in the shocks? Or are you assuming that by the compressor kicking on that there was no air and now there is? Keep in mind, these need air to ride normal. When the compressor kicks on, it adds air to "lift" the rear and it will ride firmer since it thinks its weighted down, but it isn't.
I think to be sure there is no air in the shocks, unplug the air line from the compressor that goes to those shocks and watch what happens.