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I have a 2015 GMC Yukon with condensation in the right and left front headlight assemblies. My turn indicator stopped working which usually indicates a burned out bulb. I did not notice the condensation and I took my Yukon to the dealership for what I thought was going to be a simple bulb replacement. The headlight assemblies are completely sealed which requires the replacement of the complete lamp assembly if a bulb filament burns out. The dealership told me the bulb malfunction is likely caused by the condensation. Since my visit to the dealership yesterday, the turn indicator has worked intermittently. A call back to the dealership with the update and the response was that the condensation likely caused corrosion and still needed to be replaced. They advised me the other headlight was likely to malfunction as well. It is obviously an ongoing issue since the technical service bulletin was modified to include 2016-17 models. GMs technical service bulletin notes that if certain conditions are noted (such as in my case), the replacement of the lamp assembly may not correct this condition. The condensation covers the entire lens. I live in Florida and there is little temperature differential and we have mid to high humidity most of the time. The dealership quoted me $1256 for parts and labor to replace the headlight assembly PER SIDE. Tech Service Bulletin.pdf Tech Service Bulletin.pdf Tech Service Bulletin.pdf Tech Service Bulletin.pdf
