Help!

I have a 1989 Chevy Silverado which I need some help with. I ran the truck into nine seven feet of water two nights ago while I was out messing around in a guarry. When she went down and the engine died. I brought it home pulled the plugs that night to drain the cylenders, front and rear diffs, engine oil, and put dye electric grease on connections. What else needs to be done?