2016-2019 GMC Sierra 2500/3500 Switchback DRL LED Boards

The Diode Dynamics Switchback DRL LED Boards are a direct-fit lighting upgrade for the GMC Sierra 2500 and 3500, replacing the factory LED accent strips in your headlights with boards that do significantly more. Where your stock setup illuminates in a single white tone for DRLs and parking, the Switchback boards add a second color — shifting to amber when you activate your turn signal. That switchback function gives you a sharper, more visible turn indicator built right into the daytime running light position.

Installation is straightforward because these boards are engineered specifically for your truck — no cutting, no splicing, no generic fitment headaches. They drop into place where the factory boards live, using your existing housing and wiring. The result is a clean, OEM-style appearance with noticeably improved front-end visibility for other drivers, whether you're hauling on the highway, navigating a worksite, or running in low-light conditions.

If you want more functional turn signal presence without modifying your headlight housings or compromising the factory look of your Sierra, these boards are the straightforward solution.