Oracle 16-18 GMC Sierra Headlight DRL Upgrade Kit - ColorSHIFT w/o ControllerThis new ORACLE Halo Kit is C. A. D designed to specifically install behind the stock diffuser of the 2016 2018 GMC Sierra Headlight. This kit includes the ORACLE ColorSHIFT(tm) controller and does not affect the function of the Headlight factory DRL or Turn Signal. Everything you need to add ORACLE ColorSHIFT(tm) Halos to your Headlights! Installation Instructions This Part Fits: Year Make Model Submodel 2016 2018 GMC Sierra 1500 Base 2016 2018 GMC