14-15 Sierra SLT to 16-19 HD Headlight Harness roto fab Upper led strip will be

Upper led strip will be on during the day as your DRL

If unsure please feel free to contact us with your VIN# prior to ordering

6-Mounting Brackets(GM)

Relay can be mounted to a suitable location under the hood

The headlights will automatically come on at night when headlight switch is left in Auto mode

14-15 Sierra SLT to 16-19 HD Headlight Harness roto fab Upper led strip will beThis is only for OEM headlights not aftermarket headlights. This harness is for those with 2014 and 2015 GMC Sierra SLT models that want to upgrade to the 2016 2019 HD(2500&3500) HID headlights. The 2016 2018 HD headlights look identical to the the 2014 2015 SLT headlights except they utilize a HID bulb for a much brighter and functional look. This harness provides the "clean power" needed to run the GM HID bulbs. For use with these 16 19 HD