Maybe someone else has had this issue.
I did 5100 shoks and Bilstein spring on my 02 Suburban. The ride is much better now. But, it sags when I hook my travel trailer up. My trailer is only a 13 footer and less than 200lb tongue wt.
So my question..... Is the a good progressive spring the will work well with the 5100s? I'd rather not switch to airbags.

 

Sounds like a frustrating situation. I'd recommend checking your shocks and struts too. Sometimes worn out components can contribute to sagging, even with aftermarket parts installed. Maybe get a second opinion from a different shop?

 

no, the shocks and springs are new, the springs just seem too soft.