02 Avalanche Starting problem that went away

Asking this one for a friend of mine. He jumped someone with his avalanche and the next day the truck would crank but not start. Not sure all of what he did with it but he said he fooled around with the 'fuse box' under the hood and swapped relays around. The truck now starts and runs fine. He is looking for a diagram of the fuse box for what relay drives what parts of the electrical system. I have not seen the truck so I don't even know where the box that he is referring to is located. Sorry for the lack of specific information.
This may even be listed in the owners manual but he doesn't have one. Anyone care to share a print of the diagram?
Thanks

I don't know how to delete a post but you can ignore this one....I found a copy of the owners manual online and the diagram was listed....