I did the "red carpet" walk-through for my 2017 Winnebago 5th wheel and the slideouts (opposing slides in living room) were very noisy, squeaky and squealy going out and in. They said it is totally no...
It's is going to be impossible for someone on this forum to tell you whether the noise is normal or not. No one on here can hear it and a salesman will tell you whatever. Do they make noise - yes. However "very noisy, squeaky and squealy" doesn't sound normal to me. Maybe your exaggerating what you are hearing but better yet have someone you know and trust (that has an RV with slides) give you an second opinion.