One of the first things I did with my recently acquired 2008 XLR was swapping out the DRL/Turn signal 3757A bulbs with VLEDS V6 Extreme White Amber Switchback 3157-Resistor Free kit. The kit is a bit on the expensive side but is of high quality and there was no cutting or splicing of the factory wiring required. Video of the VLEDS in my XLR.
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