PIT5318B
Possibly:
“My 2015 Silverado doesn't have the MRC so it may have a different solution. My tech understands very well the underlying cause of the vibrations. The GMdesign of the suspension damping is to have very light damping (compression and rebound) in the first 1-2 inches of vertical...
Is there a Jeep owners forum you can check?
When our old Saturn started flashing outside and inside lights when I turned the key - ch Co the Saturn forums and found out it wa the ECM. Took to dealer and they had to call district to figure out it was the ECM.