If you take a look at the Fleetwood Bounder Forum page, there are several discussions on “Bounder” dash “noises” of all sorts. Everything from popping to squeaking to wind noise, most everything was cured by repairing loose bolts and or nuts depending on year and model. Pulling the top of the dash cap is tedious but not real painful. Might gain some insight as to what may have come loose. Read that forum though, there may be some good insight.
Retired US Army Infantry Paratrooper (OIF and OEF Vet)
2017 Fleetwood Bounder 35K pulling the bass boat, Wife and two German Shepherds
20 years of RV life and still going