SSynical-1

I have a 2016 Sierra that I began to notice minor issues on a couple of years ago. This started with flickering dash lights for the gauges. The driver information screen wasn’t affected, but gauge lights flickered day and night. Last summer, I experienced the radio and radio screen shutting off for only a second or so then the truck downshifted during highway passing or hill climbing when a downshift was required to maintain speed. This progressed to the low speed steering wheel jerking out of my hand and stabilitrak warning messages. It began to do this on nearly every drive and even when briefly moving the truck around on the property. I disassembled the dash and my grounds appeared to be fine. I did take the grounds loose and cleaned the terminal ends and re-tightened the grounds. This step made no difference. I took the truck in to GM and they found no codes and could not duplicate the issues. In January, I removed the from passenger side wheel and removed the ground cable that comes direct from the battery and grounds to the frame. I thoroughly cleaned the ground end, the bolt, and the frame with CRC QD electronic cleaner. I was careful to clean the threads on the bolt and tried my best to clean the internal threads as well. I used a small amount of dielectric grease on the parts and reassembled. Since doing this I have had zero issues with this truck. I have put approximately 3500 miles on it with several uses, both long highway days and many short trips. I truly think that the protective coating on the frame is causing intermittent ground issues for the BCM. Hopefully writing this isn’t going to jinx me, but wanted to let everyone know what I tried with at least success for now and was hoping it may help. If it works for others as well, maybe we found something.