Torklift does not make an upper stable load for alot of the later Chevy/GMCs. Its due to the way the upper spring support mounts to the truck.Some have made home made ones. On my 09 dually I use the lower ones only...upper ones were never available from Torklift.
2009 Silverado 3500 dually D/A, Supersprings, Stable Loads, Bilsteins, Hellwig Sway Bar.
2010 Arctic Fox 1140 DB, 220 watts solar, custom 4 in 1 "U" shaped dinette/couch, baseboard and Cat 3 heat, 2nd dinette TV, cabover headboard storage, 67 TC mods