sagging

Just checking if this is normal rear end sag. I have about 500-600lbs of camping equipment in the back of the truck. Is this an issue with, Springs, Leaf Springs, or shocks. thanks.

Replaced the shock and lower control arm on the passenger side of my truck this past weekend and now the front end sits lower on that side. Any help would be greatly appreciated. Could it be that this shock is just shorter than the one on the driver side? (no clue what is on the driver side, it...

I pull a trailer 5 days out the week and having problem with the ass end sagging is there a load caring shock or even a heavy duty shock that will fit my truck.