Helper springs for 2018 tundra dealer says no

I would like to get some assist for mr truck to tow a 8500 pound RV. The dealer season because it will affect the stance and then therefore the safety alerts are unreliable. Anyone have any thoughts?

 

The dealer, though *possibly* correct in arguing that “safety” would be a concern, is otherwise an idiot.

Find some online, install yourself. Pretty straight forward. The helper springs may lift the rear of the truck a 1/4”?? Maybe??? They don’t come into play otherwise until there is a load in the back.

My .02

 

How about load helpers ? Air bags or the huge bump stop kind

 

https://www.partsgeek.com/cfq1mwh-toyota-tundra-suspension-rubber-helper-spring-kit.html

That's what I have on my truck pulling my camper they work great