Point being ALL MANUFACTURERS have problems period. For the most part you can get good results not modifying crap that effects other systems. Not saying you have or did but the majority of complaints come after some kind of modification(lift, delete, re programming,etc.). Saying that GM or Ford or whoever need a class action suit doesn't represent all owners, unless you have access to all owners.
1500 is rack and pinion. Car suspension. 2500 is torsion bar A frame Truck suspension. The only people having "trouble" are on the internet. Not everyone is unhappy. When you start vibrating or shaking you'll be back talking how GM suxs, etc. Good luck with your class action.