SEQUENTIAL LED DRL: The design of the Morimoto XB LED heads for the Sierra was inspired by look of the 16 through 18 Sierra headlights with the full C-shaped LED Daytime running light and honestly! if you didn't know any better, these things could pass for OEM! but it gets a bit better.The LED daytime running light is powered by Osram 5000K LEDs and is insanely bright, easily visible during the day! Daytime running light will also dim down when the parking lights or low beams are on for compliance reasons.
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PLUG-N-PLAY:As for wiring: Morimoto's LED headlights are designed to work on your Sierra without any modifications. They are plug n play on trucks that came stock with and without the integrated LED daytime running lights. No error codes! no flickering. No hyper-flashing! no nonsense.