The holes for the sensors aren't round. They have cutouts for the tabs on the sensor housing to snap in and to orient them. Plus, you can't drill through chrome without causing some flaking and opening it up to rust (you have a Laramie with chrome bumper, right?). But whatever. I'm sure your service people know best.

 

huh.....never saw a Laramie without it. I thought that was standard. Like so many of the electrical options on the higher end models, it's surprising the wiring isn't already there.