Strange probelems here...

Alright, so long story short, I went threw a little flood water
during Harvey. Maybe a little deeper than I should, up to
the top of the tires if not a little over for a few seconds. I
drive a 2005 Z71 chevy avalanche. Couple days later my
cooling fans start kicking on when the truck is off and stay
on all night, killing the battery and then after a charge the
engine light comes on. I run the codes, get back a PO-
327,332,&480. Couple knock sensors and a cooling fan
sensor issue. I pull the fuse for the cooling fan out so
battery doesn't die at night or while at work but I put it
back in when I drive. I do that for a day, get home from
work. Then I get out to the truck and my remote key isn't
working(battery is fine I checked the one in that one too),
go to start it and it won't start. It turns over, it starts to
fire..and then dies. Not getting any codes out of the truck
now and the front doors no longer have any electronic
functions(door lock,windows, mirrors) but the back doors
can still roll their windows down. Really confused...