I have a Fleetwood Excursion that did the same thing. If you remove all the drawers on the right side of the slide you can see where it came loose and push it back to where it needs to be and then screw it.
We are traveling today and and stopped in Connecticut for fuel the Pilot price was $3.65 a gallon and the Citgo truck stop right next door was $2.99 a gallon they had the big fuel nozzles and fast flow pumps. It makes no sense to me to pay the higher...