Schematics
http://www.gmupfitter.com/index.html
Seems to be a GM site that has info for companies buying a base van / truck and building on the chassis. I found a fairly complete body electrical manual that has TONS of the info I needed. I doesn't really have an "all in one" page, but there is a lot of useful info here. The one for my vehicle has over 300 pages in typical high end dealer manual format, and it's FREE! I hope this can help someone else out.
Cheers!






