2004 GMC sierra 1500 with quadrasteer please only if you know?

I need to change the rear wheel bearings and I cant get a straight answer from anyone. I had someone check their all data and its suppose to be a hub like the fronts according to their diagram which I know how to do the Haynes manual I have doesnt even mention the quad steer rearend and every parts store I call says its a press in style bearing where the fluid must be drained and rear end taken apart axle removed and so on...now this is a huge cost difference for me if its the hub I can do em myself if its the other more involved press in style then I wouldn't feel comfortable and would need to pay someone an arm and a leg to do it. its an 04 gmc sierra 1500 5.3L non flex fuel with quad steer (to me it would have to be hubs I don't see how you'd get a solid axle to turn without hubs to pivot) I was also thinking maybe its a combo of the 2 a hub you remove to pull the bearing from it maybe? Any GM techs out there ever deal with this before? any do it yourselfers like me? any help would be greatly appreciated