B+ motorhomes

I have all the RPO codes ( build codes for GM ) and the T/L has "computer selected suspension" listed for the suspension codes. It doesn't break it down to components. I don't know if the ride is the result of the dual rear wheels, weight, springs or shocks or a combo of other factors but it is a pleasure to drive. I have read some C posts talk about semi bow waves and other problems but the T/L is steady in heavy truck traffic. When I make the same trips to see the kids / grandkids in our Kia or Blazer I'm a human pretzel when we get there, even with breaks every few hours.