I had a upper shock mount go on the rear passenger side of my 96 K1500. I bought a new one online. It has four bolt holes, 2 for the bottom of the frame and another 2 for the top of the frame. I removed the old broken mount and it only was bolted at the top of the frame and was welded to the bottom of the frame. I have never had this generation GM truck before and both the rear upper mounts are like this on this truck. Bolts were not original as they were SS. Mount wasn't that rusted either.
I will be installing it with just the bolts, but should I bother having it welded to the frame? It will be a pain as the frame is coated in POR15.