Im having the same issue in my 2015 Silverado 1500 LT... vibrates between 70 -80. I have to puy my hoodie underneath the console because the change i have in cup holdet about jumps out of it! I had road force tire balance done. Did NOT fix anything. Im at a loss for words.... next trip.is to Carmax where i bought it 8 months ago. I have bad experiences with them but what do I do? I have the Maxcare coverage that cost me $2500... ive heard most have to have the drive shaft changed to a steel one. Had anyone heard about this? Any suggestions???
Jason