Schematics

Does anyone know how to get the plumbing and electrical schematics for a 2008 Malibu by Skyline? The same water damage is occurring that I had before right at the point where the pantry and "front" door are. I've looked up some troubleshooting tips for finding a leak, but I just have a gut feeling that it is coming from some lines underneath. I want to gather all the info I need to at least figure out what I'm dealing with. Then I can decide whether to take it in for repairs or fix it myself.
Thanks,