The truck has 15000k on it and only like one load of firewood and yet the rear is 3\4 of an inch lower than the front now, pro comp says thats normal??? they want to put shackles on? if this was a truck that was used more wouldnt it sag right away then? seems weird also my pro comp rims are chipped all over the little fake bolts and they havent told me wether or no they will replace ???? ne1 had this happen?

what wheels? better not be the 7031's! thats what im putting on lol!

As far as the rear sagging, I assume you took some before and after measurements to determine the 3/4 sag. If so, it might just be your stock leafs breaking in more too. All the pro comp kit does is add a 3" block (obviously cant sag) and a 1" AAL (very unlikely to give you 3/4" sag when fully broken in)