04 Yukon, 185k. Pulled the boat out of winter storeage last weekend. Hit the trailer/tow button and nothing happened, no light, trans didn't shift, nothing. I pressed the button a few different times, nothing. Not sure if this is related, but I had the carrier bearings replaced in the front diff earlier this spring. Any relationship? I searched around here and didn't see much. Maybe a bad wire in the column? Anybody have any ideas?