Ohhh... you are asking about this?
I believe that the shock absorbers (dampers) have electronically variable valving. The premium arnott shocks are a standard shock and do not have electronically variable valving, however they do have air bags as you can clearly see. These shocks maintain the vehicles auto levelling ability with the bags. It is simply the variable valving that is commonly problematic that is eliminated in this particular case. Does that help?
https://www.arnottindustries.com/part_GMC_yid15_pid96_gid976.html