Does any one know if schematic diagrams are available for the 2020 2500RL TT? I'd like to see things like the location and orientation of the holding tanks, plumbing, wiring, etc, without removing the underbelly.
GD support might be able to acommodate you on some of that. Black tank is usually under toilet, a grey will be located near or under shower, and (if applicable) the other grey will be under the kitchen sink. Tank outlets usually are on the end of tanks which typically run length wise with RV.
Wiring....... well..... pretty much where you find it.
Maybe worth while taking a peek under the coroplast skirt anyway to see what your dealing with.
I was sent an "electric plan" for ours when I asked. It was just a schematic of the breakers and what they were connected to. It was not 100% accurate when it came to the outlets. It does not show wiring details.