No Parking or Tail Lights

[mr.wikid]

Hey guys. New member here. I have an 07 Denali XL. My tail lights and parking lights will not work. Brake, turn, headlights all work....but no parking or tail. Fuses are good and so are the relays. Anybody have a clue?

 

[08grey]

Check harness distribution box under rear bumper.