Finally happened to me
Got the coach back from the dealer with plenty of time before leaving for the winter.
Rain, rain, rain. Finally get to Georgia, yesterday. Wife has to go to potty. Pull over at turnaround. Walk around rig and notice right side tires are about an inch apart. Look underneath and find rear leaf spring hanger separating from frame.
Rv park half a mile from me. Pull in and start looking for repair welding place. That was this morning.
So far, have welder on hook for tomorrow. Parts if he needs them here Wednesday.
I'd heard some issues with this chassis, but always felt it was the 'other guy'. Can't say that now.
Good thing is welder works with extended warranty. Parts are $11 for the hanger (I bought 3). Rv park people are super nice.
Might want to check your LCI correct track system for signs of excess rust, cracking and separation.
2017 CC38EL Silverado 3500HD