Glad to have you here with us.
Manufacturers don't change tank size often. The chart Cliff gave you is most likely on the money. If you have any doubts I'm sure a call to Fleetwood will answer your concerns.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS