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Matt
OEM does have electronic dampening on the front just not auto leveling. Thats why there is a wire connected to your shocks. Arrnott doesn't offer them because there is nothing special about the elec shock except for the price and they cant reproduce them because they don't have the OK from GM. I believe Delco is the only company that can reproduce them (legally) to work with their system thats why they are so expensive. Thats why the aftermarket bilstein rears do not have the elec dampening only the airshock.
They give you resistors with the bilstiens to fool your ECM (auto dampening system) into thinking you still have 2 OEM shocks on the rear. Same thing that you would do if you were going to put regular bilstein 5100's or any air shock on them. They just bump up the price because they think your too stupid to do your homework or have a place like this to get info from others.
My dad can get pretty killer deals on GM OEM stuff through his work so trying to figure out what path I wanna do! Thinking about doing the rear reman OEM shocks and compressor package deal on Ebay and buying OEM fronts from my dads work, that way I still have the factory dampening option in the shocks!