Get the service manual for your truck. It's about four inches of the thinest paper you'll find - everything from changing sparkplugs in a V10 to rebuilding a 47RE. There isn't a piece of split plastic loom or electrical tape that isn't somewhere in the massive electrical diagrams section. I got mine directly from DC - I think the number is somewhere in the back of the owners manual. If not ask your dealer for the number. It's a well spent $90 - trust me you won't be sorry.
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'00 2500 reg cab LB 4x4, 5spd, LSD, Hot Poweredge, 275 injectors, Warn HS9500I winch, Trans4mer grille guard/winchmount, TracRack, Line-X OTR, G-tech, Loadsaver, and a bunch of other crap I don't technically "need" Name a factory option-I don't have it!