Do i need a specific knuckle for a 6 in lift kit

[newtogmc]

I'm new and clueless to lifts, my father is the actual owner of the 2004 yukon 4.8 rwd I'm referring to. He paid a shop to install a RC 6" lift kit but they botched it and outright didn't install everything, I already replaced the wheel bearings, center link, inner/outer tie rods, pitman/idler arms,sway bar links and control arms to start but i noticed the control arm was loose despite the proper torque on the knuckle....so the hole is stretched or whatever so now the knuckle has to be swapped but I don't know if I need a 3" lift specific knuckle or stock or maybe even swapped from another gm compatible part. I'd greatly appreciate some help, Thank You

 

[swathdiver]

If yours were mine the first thing I would do is get a part list from the specific lift that was purchased and see what, if anything, is missing.

 

[bodabdan]

You may get better responses in lifted section.

 

[Fless]

You may get better responses in lifted section.

Moved to the lifted section.