Escalade/Tahoe/Suburban suspension upgrades

Yeah, I've stayed stock to make sure I don't accidentally alter the factory tow ratings (which is 8400 pounds max).

I'm not looking to increase the tow rating - in fact, I've never been anywhere near the max rating with my trailer (which is an aluminum frame ultra-lite with a single half-slide and other weight conscious design elements).

I'm looking for aftermarket solutions that will improve the experience within the factory specifications I'm already operating within. Anything that will improve ride, stability, sway. I know they sell springs, stabilizers, air spring and airbag systems and other aftermarket solutions. I'm just not familiar with any of them and I'm wondering if anyone here has any experience and what their thoughts are.

The 2006 Escalade has a 6l V8 engine. It is plenty powerful enough. When I first started driving with this rig I was worried about the short wheelbase of the Tahoe chassis, but I've been through serious storms, insane wind in Wyoming, and other sketchy weather and it has never been a challenge. But if I can purchase some extra peace of mind - I'm not opposed to after market upgrades that will provide this.

There is a 3 inch lift kit, but it wouldn't help much. Then the rubber bushings and other suspension parts need to be replaced if worn. You can reflash it for better MPGs at certain speeds. That's about it other than tires.

The towing capacity of a vehicle is ultimately determined by the axle, tire and rim ratings. Assuming a powerful enough engine. Nothing you do above the axles will affect that tow rating.

If you want a smoother ride maybe you should look at the other suspension elements: shocks and springs ect.