Wife has an ‘04 Escalade with the air assist rear shocks and it was giving me fits (think reverse Carolina squat) for a while. I did all the battery unhook, air bleed, unhook the pump tricks to try and reset it. Turned out to be a faulty ride level/control actuator attached to the rear drivers trailing arm giving a bad/no read situation. From my research of trying to eliminate the System all together the consensus was that, if the computer and pump are running good just hold what you got. Yes the air assist shocks are pricey but deleting the system is just as pricey and you have to deal with the computer not being happy as the ride control also talks to the braking system etc. I’m glad it worked out too cause I love the thing having the 6.0 and the heavier Suspension it tows nicely and hauls some ass all while riding in style.