not sure if it will work for you, but when we were in the market for a cruiser we looked at a used one (2 or 3 yrs old) and it had a squeak in the floor. We found it from underneath in the front storage area. It seemed that the floor was slightly warped and there was a gap between the aluminum framing and the floor board. I thought that a simple wedge jammed in there would do the trick.
Maybe some others will have better solutions.....
Matt & Kathy and the newest little camper Lucas
Chance (Yellow lab)
'10 Dodge Ram 3500 CC/LB
'11 Crossroads Cruiser CF325CK
I did what Old Farmer suggested, in the upper bedroom we had a squeak. I lifted the carpet (just a rolled stapled edge from the factory) and used course thread self tapping screws. I grabbed the pneaumatic stapler and re-did the rolled edge. About an hours job and no one knew except me and the wife. No more squeak!
2013 Jayco Eagle 334RBTS
Crossroads Forum Lurker