Hey guys, I noticed that my new suburban has some interesting things that I haven't seen before on 3100's. I think I have a factory installed sway bar up front? Also, in the rear, I have springs over the rear axle (looks like helper springs) as well as the typical ones under the axle. Does anybody put the helper springs back in the rear? Is this factory? I guess I need to poke through my assembly manual tonight when I get home.