285/60/20 BFG K02 absolutely no issues. I added the larger GM splash guard as well, they fit a bit larger than the originals but still clear. I travel some gravel roads and the K02's will certainly throw some rocks. I feel the guards, especially the larger fronts help keep them off the rockers (and for the guys that keep asking about the exhaust tips mask and plastidip in place, 6 months no issues).
It is actually not that tough of a fix. Found the door panel removal on YouTube and the harness is pretty straight forward unplug and replug. Took maybe an hour to remove and replace.
Update on mine. I pulled the entire wiring harness out of the door and did a continuity test. The green/yellow wire seemed to be an issue. Circuit 6134 Which is the linear interconnect network (communication with the BCM). Replaced wiring harness with GM#84290987. Problem solved.
Did this get resolved? My 2015 is having the same issue. Checked the harness and power seems to be getting to both the switch and the window motor.
Also I swapped the switches out for the ones from a buddies truck. No change.
Help please.