This is only for OEM headlights not aftermarket headlights.
On all 2019-2021 1500 GMC Sierra's your DRL will actually turn off when you use the turn signal during daytime use. This harness will override that feature and keep your DRL on. This harness will not work on the AT4, SLT or Denali models. If unsure please contact us prior to ordering with your VIN#.
Works with the base models, SLE models and elevation models only. Will not work on the new body HD models at this time.
Please enter your VIN # below and we will confirm fitment before it ships.
