One other thing you need is a factory assembly manual for your truck. The wiring diagram will show you what wire connects to what but it won't show you where it goes/how it is routed. The assembly manual will have pictures that you can follow to see where the wires were bundled/routed/hung from the factory. Those two documents together and you will be golden.
Thanks Larry. I do have the factory assembly manual. I think it will be helpful.