2015 Tahoe front driver blinker
 

My wife and I bought a 2015 Tahoe back in August and the front driver headlight seal had broken causing a build up of condensation inside. About 6 weeks ago the front driver side blinker quit working. I replaced the bulb, and everything went back to normal for about a week before the blinker quit working again. Since then I have checked the fuses and everything is fine there. Tonight I replaced the entire headlight assembly (and tried 2 different blinker bulbs), but the problem persists. I'm at a loss of what to try next. The error message we get on the dashboard reads "Front Left Indicator Failure" every time we use the blinker. Thoughts?