Neither one of these changed a single thing about your springs. Springs do not get "stiffer"...you can do nothing to change the rate of a spring, so the spacers or the shocks are not the culprit.

As I stated above.

 

I thought that setting the Bilsteins on the higher settings compressed the spring? Giving the spring less room to "flex"?

 

I'm taking it back in Monday to have the spacers put back in and Bilsteins put back to the stock height setting. Crossing my fingers...

 

Both of you are right. The spring rate doesn't increase, but the added preload to the coil to give lift gives the same effect as a stiffer spring.

 

Close enough, yes. However, the perceived increase in stiffness from the adjustable shocks is no where near severe enough to induce the ride characteristics the OP is describing; or at least not on any truck I've ever ridden in. Unless it's just a combination of that, the tires, and super-sensitive OP.

 

I just wanted to throw this out there.

I thought of you yesterday Cuz. My truck is lowered 2" all around and my camber was off. I kept checking the torque on everything and even after finding a few semi loose items, the quality still sucked when hitting a bump. I mean like shake the truck and hear it rattle bad. I have hated driving my truck over bumpy roads for a year plus.

I installed the SPC camber bolt kit and had an alignment specialist (aligns racecars, lowered vehicles, stock etc) align my truck and after ridding my truck of the camber the truck rides like stock. Stiffer obviously because of the high performance shocks. I'm wondering if this might be part of your issue. You might have some positive camber since you truck is leveled. Mine was negative because I'm lowered. Might be worth looking at the prinout because that is what changed how my truck is riding.