Installed Bilstein 5100s in the rear. Easy job, just need a 21mm socket, ratchet, torque wrench and a 21mm wrench. Didn’t have one so I subbed the 21mm wrench for 13/16s. Top bolt on the drivers side was a little tough to reach between the spare tire and exhaust but not impossible. Didn’t need to jack anything up, just leave the straps on the shocks and you only have to compress them by hand a little more to get the lower bolt through.
Part number below for non-factory lifted 2019+.
Immediately noticed a difference while taking the truck over some broken down railroad crossing. Rear end no longer wants to bounce sideways, even with the stiff NHT suspension and 22s. Good bang for the buck, plus one of my original shocks already had an oily film on it like she may have been letting go. I guess 14k miles is nearing the end of life for cheap GM shocks. ?