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2000 suburban wet floorboard

07-10-2005, 11:17 PM
The right side(passenger) second row floorboard is wet in my 2000 LT Suburban. I see no leaks or wetness on the underneath side of the vehicle. The carpet and pad are pretty well soaked.

It has been extremely hot with no rain. We are using the air conditioning alot. Although it has been recently washed, I'm not convinced the water is from an outside source. Could this be related to the airconditioner? Are any parts or lines in the vicinity as to be the source? Both front and rear units cool very well. Is there a rear condensor or part that could be "icing" over and then melting which could be the culprit?

07-12-2005, 12:54 AM
It sounds like the A/C is leaking onto your floorboard. First I would get under and the dash and make sure that all the duct work is connected properly, make especially sure it is connected at the firewall. If that looks good then there should be a drain hole around the bottom of your evaporator(which is under the hood on the passeger firewall), and it is probably clogged. Clean that out and that should take care of it. Yes it is a pain to deal with but it beats a wet floor all the time. If yours is like my 88 Suburban then that A/C really pulls the moisture out, and it relly drains a lot of water.

07-14-2005, 08:46 PM
I had the same problem with my '99. Check the drain tube around the lower right side of the fire wall in the engine compartment. Mine was cracked somehow but they can get clogged with spider webs or mildew. When that happens the evaporator case fills up with the condesation and leaks into the passenger compartment. I would say the easiest thing to do first is to try to clean out the drain with some pipe cleaners since they are bendable and the drain tube usually has a 90 degree bend. You'll know if it works when water starts to flow out. If not then you may have a crack like I did and have to do some repairs to the housing. Good luck!!

07-28-2005, 07:13 AM
Been there with my 99. I posted a while back to someone else with this issue and maybe this will help. Ours did the same thing and I noticed that ONLY when the engine was running and the AC on, there was a steady stream of water coming from the area where the condensate drain line penetrated the firewall (could not detect it with the engine off). Turns out that the radiatior fan builds up enough air pressure under the hood to force the water back into the opening around the tube. We bought our 99 used and the drain line looked as though it was missing an extension tube. It only protruded about 1/2" inch from the firewall and had a collar on it like it was missing something. So I fabricated a tube out of an old pre-molded heater hose and it solved the problem. Hope this helps.

07-28-2005, 07:53 PM
I had the same problem. Mine was fixed by resealing the wire passages that go to the door. The audio installed didnt reseal them properly and water POURED in

08-15-2005, 03:15 PM
just in case you didnt fix your problem on my 2000 suburban the little cover that goes around the antenna was missing so i had to buy another one and the problem was fixed but i had blow dry the carpet because it was super wet.

in your case it could be weeks without rain but since the under carpeting doesn't breathe its very difficult for it to dry without heating it directly.

check if it smells wierd it could be a/c coolant

the best way to diagnose it would be too lift the carpet up and spray water on the outside while someone sits inside and checks for water if its a/c coolant then your a/c system should be pretty low on refrigerant so have that checked out or buy a meter.

08-14-2010, 11:19 AM
I have a 2002 Suburban that was leaking condensate onto the passenger side floor in the front. I checked the drain tube and it seemed alright. I decided to remove the black cover in the passenger side floor area. There are three screws - one next to the console which is not easy to remove, one in the middle, and one next to the door opening. While attempting to remove the center screw I discovered the problem. The center screw turnd freely but would not back out. It turns out that the area where the screw is supposed screw in to the blower casing had broken leaving a hole about the size of a quarter in the casing. I turned the A/C on and after a few minutes water began pouring out of the quarter sized hole. I dry fitted the piece back into the hole and covered the area with silicone caulk and the problem was solved.:)

08-24-2010, 09:27 PM
I had a similar problem on my 2001 Suburban. I went from resealing the roof rack bolts, to checking the drains for the sunroof. Come to find out it was the pilar right next to the top of the windshield where the seals had dried. Fixed it in 30 min. just some places to look at. Roof rack bolts, Sun Roof seal and drains down each front pilar and the second pilars, possibly coming in through the air selector fin in the hvac unit. Also becareful I let mine go figuring it was small, cost me a new hvac blower motor and blower resistor. I can send pics of where I found my leak. All these suggestions are just that, I make no guarantee as I am a noob!!

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