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So, which lights are you having issues with? Your ddl is your low beam. The LED strip is for looks and just about twice as bright as a Christmas tree bulb, but I if you are referring to entire assembly getting moisture, that’s a different question. It can be taken apart, dried and sealed back together. YouTube is tire friend. 16s didn’t come from the factory with any replaceable LED bulbs in the headlight assembly.Can the led driving lights be repaired on a 2016 tahoe or does the whole light assembly have to be replaced?
Mine is a ltz not sure if that makes any difference or not. Would you have a wiring diagram so I would know what pins to check at the plug.If you have a multi meter you could check the voltage with the light on to see if that's your problem.