I had the same exact issue, It is the outside kitchen drain leaking . If you pull out the outside fridge you will see a cheap plastic fitting, this fitting craks very easy. Our dealr took care of us by replacing the fitting with a much more heavier one. Free of charge. There are two of those cheap fiting, one is under the fridge INSIDE THE CAMPER, if you take out the draw that in under the fridge you will see another one of those cheap fittings. I think they are gray in color, not sure. But if you take it in to get fixed, have them replace both of them. Shouold be under warrenty , our was.
2013 Chevy 2500HD-Diesel
Sunset Trail TT 32RL-2013-