[DetroitDan]

I did check the shock bounce, it feels stiff, not soupy like what I think of bad shocks being. That's why I didn't think it was shocks. The shocks don't look new but they aren't leaking. I've worn shocks out before without getting this. Although I can't remember doing it to a stock truck, usually lift springs and longer shocks are one of the first things I do. So these bumpstop marks are making me suspicious.
At this point I will try anything, but I have heard from everyone and everywhere that every single component can and will cause this. One friend had it happen and said it was the stabilizer and that fixed it. Another said it happened and it was wheel bearings. If you think a particular component is the cause, please offer a little explanation as to how it is happening.
Like I said, I think it is a wheel hopping up and down, but I've been told thats in my head, and it's actually the wheels going left to right. I can feel it in the steering wheel, but it;s just a rapid shake so I cant tell by that. But the bumpstop marks tend to agree with it being up and down motion as opposed to side beside.
Steering, tierods all feel ok, not new but not sloppy loose either. Again, I've worn out tierods before and not experienced this.
Thanks for all the input