I need help from you experts out there- During hurricane Katrina here in Miami, I got about a half a foot of water in my 2001 Tahoe, but at one time the wateer had come up to about halfway up the grille. I drove the truck (which was running erratically) to a hill so that any residual water could drain out of the exhaust and replaced the moist air filter. The truck drove great all weekend, but suddenly the "reduced engine power" light came on, which it is supposed to do in case the truck overheats, but the temperature guage was saying everything was fine. The traction control ight began to show "Traction off" and would not respond to the button. I am very mechanically inclined, but the Haynes manual gives no hint as to where to start looking in something like this. I think that maybe the computer thinks that the truck is overheating due to the fact that there still may be restriction in the exhaust, but do I need a computer to clear the trouble code so that the engine will run normally once all the water is out?