Under the couch, where? I've lifted the seats / plywood off, and there's nothing under there. Is there a panel under/under the couch?
You mean that panel with the air duct on it?
The couch had storage room under it, but at the very end by the rear door there was a wood panel from the floor to the bottom of the couch seat that blocked off the area from there to the end of the couch and the top of the opening was covered with a thin piece of wood that was screwed in to the framework of the couch, creating an enclosed space.
By removing that thin piece of wood, we found the water pump hidden inside of that space.
Funny, my dealership had no problem winterizing it when I took it in, but they would never tell me where the water pump was at when I asked them several times!
I think there was duct work running through there, but I don't remember for sure.