The 1 ton Suburban is for government & ultra rich folks who think they are VIPs...
Armor plating is the main reason. Towing is NOT in their vocabulary
As for travelnman's bouncing...key is that he says only on certain parts and not on other parts of the highway/roadway...
Harmonics of the distance between concrete joints, speed traveling, weight vs dampening power and a host of other contributing factors.
Slow down to even speeding up might move the joint harmonics off of your TV's natural harmonics
Tire pressure, tire class and/or rating, rim width, suspension bushings, shocks, etc all contribute to either reducing to amplifying