Hit curb hard upper control bushing came out - 2005 GMC Envoy Denali

control arm bushings or upper or lower ball joints are worn and or out of grease

The sway bar gives from side to side so I doubt your problem is in that. Of course it is really hard for me to pinpoint your problem without inspecting the vehicle, how hard did the vehicle hit the curb? If it hit it pretty hard and severely bent the lower control arm, I would suspect that you have some frame damage.

You need to really inspect the frame where the lower control arm mounts, it may help to look at the other side and compare it to the damaged side. You'll be looking for slight wrinkles or bends in places near where the control arm mounts or follow back and keep looking for any signs of slight signs of damage.

And, are we talking about the front, rear or both on the vehicle?
If it's the rear, the rear is weaker than the front. Follow the frame rail all the way towards the middle and look for signs of damage.

If you look closely, you should be able to find the damaged area.
It being a '94 it doesn't take much damage for your insurance to total the vehicle out, (if you happen to have full coverage insurance and file it.)
I hope this may help.

the wiper control arms bushings are worn out and need replaced..

1. Your clutch is not releasing. This is commonly caused by a leaking slave cylinder. Replace it.
Could also be an indicator of really hard driving.
2. Leaks like this usually don't fix themselves.Flush the rad, replace it it the bottom fins are rotted, double check the themostat and the hoses.

3. Bent in at the bottom? Someone has hit a curb, HARD! You've bent the lower control arm and this has to be replaced. If this was just a control arm bush (these are replacable with a shop press) you'l usually hear rattling.

SD

yes, you may have hit the curb, and done some damage to upper or lower arms etc.

Possible that the chassis is damaged on the side that hit the curb, the front suspension has gone out of alignment. Get the alignment checked, replace balance rods, bushes or lower arm.

these cars have indepentant rear suspention with mant moving parts possible upper and lower control arms,rear swaybar, torsion bar very hard to say with out pictures. recommend garage and put on lift tire removed and inspection by trained tech. comparing setup to a suspention diagram

Check the bushings in the wheel well that is making the noise - it could be a ball joint, sway bar end link, control arm link, or even an upper strut mount. Lots of things can cause the noises like that, but usually they're not too hard to see - failing bushings usually have visible tears and/or leakage of fluid.

If you did not damage the frame, you more than likely damaged the lower control arm (a triangle shaped aluminum part which mounts to steering knuckle(tire side) and two bushing mounts (To frame) Check the condition against the undamaged side. If the control arm is damaged see if you can get one from a junk yard. If you do replace any part yourself Get an alignment immediately after repair.

It could well prove to be a big job? by the sounds of it I would get it to a Jag dealer or indi Jag garage to be looked at properly.
It might mean that you need a new or second hand IRS unit.