This 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 bright day and night. (250520)
PLEASE PROVIDE YOUR VIN # AT CHECKOUT AND WE WILL VERIFY THE MODEL OF YOUR CURRENT VEHICLE
