Rear Suspension Noise (Click)

Hey guys I have 1000 miles now on my truck and noticed if I step on the brakes enough for the back end to raise slightly I'm getting a 100% repeatable clicking noise from the passenger rear. I can actually hear in inside the truck with the windows up. If i have the windows down and am near an object it's pretty loud. I'll have to look into this once the rain stops

Could be fuel tank sliding around. I have this too, but only when tank is full after being empty, then the noise disappears after a short while? Maybe you are hearing the same.