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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
The headlights will automatically come on at night when headlight switch is left in Auto mode
IF YOU CURRENTLY HAVE A USB/AUX PORT
As of December of 2025 GM has discontinued the X5 screen cable
6-Mounting Brackets(GM)
14-15 Sierra SLT to 16-19 HD Headlight Harness roto fab The headlights will automatically comeThis 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
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