Hi everyone I have a 2013 tahoe ltz. I noticed that on the passenger mirror the blind zone alert only turns on and flashes when I hit the turn signal. If a vehicle is just cruising in my blind spot to my right it will not illuminate, again unless I hit the turn signal which then it will start to flash. My driver side light indicator works fine and as it should. And today I noticed it started working fine for a trip but then called it quits after turning on the vehicle again after a while. There are no error codes being displayed either. Any ideas?