Hello,
Hope someone has had the problem, i have a 2007 silverado NBS LTZ Z71 4x4 and its making a clunky noise that is intermitted. I cant figure out where its coming from and 2 shops were able to replicate but not able to fix. There are no warning lights on the dash or messages when starting up. Heres whats been checked.

-transmission rebuilt 2 years ago by presvious owner
-front and rear drive shafts
-T case has been tore down no problems found
-both front CV axels checked
-front and rear Diff

Here is the video you can hear the noise, when it gets louder thats just me rolling down the window

https://www.dropbox.com/s/7yyux3vl7d5bmr3/20210308_173154_001.mp4?dl=0

TIA this one has me stumped