Truck bounces badly after replacing suspension parts

Hello, I'm Danny.

Just a quick question first. Did you mark the torsion bars for correct re-installation?
Torsion bars are marked front-to back, side-to side, directional. That makes a difference and makes sense of your symptom. Let me know. Hope this helps and thanks for using 2CarPros.

Danny-

Hello again.

Did you install the torsion bars correctly? If you look at the hex end on the face there is a directional stamp telling you direction and placement. It has a directional arrow showing which direction (side) to be installed. Also, Did you use a torsion bar clamp? It makes things easy. Your local auto parts stores might be able to rent you one through the tool loaner program. Picture attached below. Hope this helps and feel free to ask any questions if needed for this problem.I can get you through this as I personally owned a 1997 K1500 and now also an 1989 K1500. Thanks again for using 2CarPros.

Danny-

Hi,

If I can jump in here, I think the point Danny is making is if your truck is bouncing after this then clearly the torsion bar is the likely issue. If you didn't completely remove them which means you didn't use the tool that he pictured to relieve the tension from the adjuster and then remove the adjuster, I suspect you did not get the proper amount of torsion back on the bar to prevent it from bouncing or at least you don't have even tension.

When replacing the lower arms you need to remove the torsion bars using that tool so that you are loading and unloading them properly. I suspect you are going to have to completely remove them and then add the tension back on properly. I have never heard of someone removing some of the tension and then trying to get the control arm out. The bar needs to be completely relieved and then reloaded.