[FrostZ]

The DRL’s have a few modes, when the car is in park with the lights on auto they are off entirely, once you put the car in drive / reverse they turn on to “bright mode.” Once the auto headlights activate, or you manually select parking lights / headlights, they go into their “dim mode”. It is my understanding they are PWM controlled so you probably need the proper GM harness that gets the PWM info from what I assume would be the BCM. If they just removed the DRL’s you might be in luck and it could just be plug and play, if not you maybe going down a rabbit hole chasing a BCM if that needs programming as well.