2019-2023 GMC Sierra New Body Foglight Wiring Harness(Adding Fog Lights)
- Foglight Function:
- Auto on/stay on with highbeams 250500
The 2019-2023 GMC Sierra New Body Foglight Wiring Harness(Adding Fog Lights) is a plug-and-play wiring solution built specifically for the T1 Gen (2019–2024) GMC Sierra. No cutting, splicing, or professional installation required — simply connect to your existing factory harness connectors and go.
Have you added fog lights to your new Sierra and need a proper way to connect them, well look no further.
Harness is available in 1 of 3 options.
This harness will work on both GM lights as well as aftermarket fog lights as all aftermarket fog lights, for this year range, use the same GM plug.
Some states require this..
Both the 250500 and 250505 option, trigger the fog lights on when the parking lights are on.
They are not triggered off of the low beam bulb as many trucks use the low beam as the DRL's.
If you are to manually turn your headlight switch, to the parking light position, you will have parking lights and fog lights.
In auto mode, they will just come on automatically at night as the parking lights come on at night.
Unfortunately the GM switch cannot be used as the GM switch is not a simple on/off switch.
Our harness will come with all the necessary wiring and a 1 inch round on/off switch.
You can use our switch or feel free to use a on/off switch of your choice.
- The fog lights will not be on during the day unless you manually turn on your headlight switch.
- Switch Installation-Click Here Does not require dealer programming..
- Harness is designed to work with OEM GM fog lights Harness works on 19-21 Silverado 1500 (New Body) 2022 Silverado 1500 Limited 2020-2023 Silverado HD models WILL NOT FIT 22+REFRESH MODELS OVERVIEW VIDEO
Please verify your specific model year and trim before ordering. Some harnesses are built to order — review all options carefully.
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