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Hello, I am having an issue with the headlights in my 2018 Premier. The passenger side headlight sometimes works and sometimes doesn't. When it powers on there is a high pitch hum coming from the ballast. I looked around and it seems like the ballast available for this model car is round but the one in the car is square with model 044663. Does anyone know where I can find a replacement? GMpartsdirect only shows the round one and every other site shows as sold out.
