Anonymous
You put the shocks on upside down, or, you broke the weld on the underside. Either way, you're not a good mechanic. Go take a look.
fuzzy
I do not know what a fine shock is.
My guess is that you put real shocks on instead of the factory GM mush ride amatics. Yukons aren't really trucks, just really large sedans, and as such they are programed to ride as such.
Pearl
maybe you should get a mechanic to check it out