left rear turn signal only works durring the day
i have an 04 silverado 1500 4x4 ls, the rear left turn signal for the past week will not work once its dark only in the daytime, extremely weird to me. the front works the 194 bulb in the rear works but the 3157 bulb in the rear wont work. durring the day it works fine and the right side works fine all the time. anyone have any ideas?