Its a module on the drivers side of the rad support. Its hard to get at. I disabled mine cause the truck looks hella mean with the side markers and signal lights on. Its only mandatory on newer vehicles obviously older vehicles on the road did not have them so no one is going to say anything. Just unplug all wires going to and from the module.

Its kinda peeping out in the picture, the module itself is placed at an angle on the rad support.