Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
511377
As per Lippert Components Technical Service Bulletin 11-004-21. The slide room actuator was assembled incorrectly, which may cause the room to become stuck in the out position and prevent from fully retracting.
831334
It was discovered that the manufacturing plant did not cut a stress relief line in the upper deck Driver Side and in on certain models, Passenger Side under the slide room(s). The upper deck in the Impression Fifth-Wheel needs to flex, without the "stress relief cut" the sidewall filon may crack under the slide room(s).
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.