Crown Designed Into Chev and GMC Truck Beds

I'm on a second 2006 GM, before that was a 2005 GMC (in sig) and I had to put Stable loads on my leaf springs to make the Porpoising go away on both rigs and that was before I fixed the airbags on the GM.

Funny that a 3/8's crown can still support (rock) a 2 ton camper, you'd think that load would be the number to make it lay flat.