I googled Lippert slides and found a youtube video from the mfg on lubing the slides so I bought the specific lube brand they recommended and we went for a drive this weekend [about 30 miles] and it was SILENT
What upsets me the most about this whole episode is I contacted Camping World dealer and it would be 3 weeks for an appointment and I would have to leave it for several days he never suggested lubing the slides . As far as the side vent I am going to try a thin self stick foam or vinyl weatherstrip to minimize the noise. Here is the email from Winnebago.
We would advise you to your Winnebago Industries, Inc. Authorized Service Center to get the slideouts looked at, possibly they can try a lube spray that is recommended by the manufacturer of the slideout mechanisms to help with the noise. Another scenario that will help with the customer that have complaints with the noise from the slideouts has been to use travel rods.