Hello I'm new to the forum and happy I found it.. I love my Suburban... I have had it for years.. Many hour and $ spent on mods and maintenance. I recently needed shocks for my rig front and rear they were shot and it showed.. I also had a squeak when I went over speed bumps and humps... I figured it was the blown factory air ride but I replaced the shocks with with new ones the noise was still there.. I have also replaced the sway bar and links.. I cannot replicate the sound by jumping on the bumper so I'm a little stumped.. The noise is a squeak but its kind of a deeper tone/sound kind of like I got a big monkey in the back going whooo whooo when I go over the bumps Really annoyed... Any Ideas?

 

Did you ever figure it out? Mine is doing the same thing. Sounds like the rear end is going to fall out

 

Welcome to the forum...
Year and model ?
Slip yoke is dry? bad shock? U-joint?
what have you tried so far to isolate it?

 

It's a 2001 it has brand new shocks and u joints and recently serviced trans I greased the slip yoke and installed a new tail shaft seal. When I go over large bumps it feels like the whole rear axle is loose and also feels like it moves side to side.

 

Things that come to mind:
Body bushings worn or missing
engine and transmission mounts torn
Leaf spring clamps or bolts loose or missing
Wrong shocks used or bushing at shock connection missing
loose shock retaining bolt(s)
do the rear axle seals leak?

Has the vehicle been lifted or dropped, check the shackles....
Leaf spring bushings...