I have a 2015 Vista 31KE and have noises from my single slide. Learning that lube, in the right places may help.
On a sidebar, one thing that has significantly changed the "noise" level in my coach is Sumo Springs. They are not cheap, but wow do they change the environment.
She still launches when she hits a big bump, but when she lands, its like.. 'Ah..." so gentle... and half of what used to rattle, rattles less.
I know that is not your question, but it has made a significant difference in ride and in the "noises in the night" that make a driver crazy because he/she cannot go back and find them!