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This harness makes it so that your DRL's will retain current daytime function and will also be on whenever your ZL1 headlamps are on
This harness eliminates t-taping into the factory harness when installing load resistors
This harness is for all radar detectors that use a phone cord style connector (RJ11)
INSTALL INSTRUCTIONS-CLICK HERE
you can choose to use a manual switch
16-18 Sierra 1500 Non-Denali to 16-18 1500 Denali Headlight Harness GMC "C" Nightime Function:Like Factory (250540) This harness makes it soThis is only for OEM headlights not aftermarket headlights. This harness is for those with 2016 2018 GMC half ton Sierra, Non Denali models and are installing the 2016 2018 GMC half ton Denali Headlights. Harness is plug and play with load resistors to compensate for the addition of LED turn signals. Harness is available in 2 different options. Factory DRL will be bright during the day and dim down at night (250540) Bright at night: DRL's will remain
