Your tanks MAY be empty. You might have something on the 3/4 tank sensor giving a false reading. If you can, flush the tank real good. I fill mine again with water to help wash the "culprits" off the sensors.
2013 Jayco Eagle 328 RLTS
2012 Ford F250 6.2L 4x4 CCSB W/Air Lift air bags
2002 Coleman Bayside Elite (traded)
Me, Momma and Charles (RIP buddy)
And introducing Sofie!! ;)