I've been fighting rough ride for years now, previously on a 2005 ext cab Chevrolet 2500 and now a bit with my new rig below. The previous truck bucked badly on segmented highways when towing a TT.
Turns out I was running WAY too high of pressure with my tires. I consistently ran 75-80 psi which caused an awful ride. Now my pressures are set to the actual weight on the tires, not what the door placard says, this is especially true with aftermarket tires. I run 45 front, 35 rear when unloaded and 45 front, 55 rear when loaded.
These numbers came from my tire manufacturer according to their load tables.
Weigh your rig fully loaded, call your tire manufacturer for their recommended pressure.
Something to try.
