These look like LEDs, but I can make them turn on, nor have I ever seen them do anything. Anyone have know what they are? @ls1mike has a very similar truck, hoping he will know.
They are LEDs, which light the side and rear of the ground near the truck. They work only when the cargo light button is in the "On" position AND the truck is in Park, Reverse, or Neutral. I turned them on while my wife was standing beside the truck in the dark. They are very bright, or at least that's what she told me.