Question about 2004 GMC Envoy

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Water in passenger floorboard...not antifreeze...water not draining out underneath vechicle...does this sound like stopped hose or heater coil?

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Air con drain off pipe in the cab is blocked ,look outside under the bonnet by the firewall passenger side and look for a rubber outlet hose its blocked

Posted on May 27, 2010

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In most cases it condensation from the ac, find the and seal it that should do it

Posted on May 27, 2010

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I had that problem with my car but it turned out to be a bad seal on the windshield from the factory.

Posted on May 28, 2010

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1 Answer

97 K1500 passenger side floorboard gets soaking wet with really hot water. No sign of leaks in hoses or radiator and air conditioning drain is draining. Help??


Check the heater core it has a leak in it. Is the radiator losing antifreeze or a small amount at a time. Then it would be the heater core if no other leaks are showing.

Jul 12, 2014 | 1997 Chevrolet K1500

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A/C part condensation water in center under dash is leaking on floor. Is there a way to put a pan around it to catch the water and then drill hole in it and run it out side.


YOUR EVAPORATOR DRAIN TUBE HOLE STOPPED UP.SAFELY RAISE SUPPORT VECHICLE ON JACK STANDS.MAKE SURE VECHICLE PARKED ON SOLID LEVEL GROUND.GO UNDERNEATHER VECHICLE ON PASSENGER SIDE WHERE HEATER CORE HOSES GOES INTO FIREWALL LOOK UNDER THAT AREA FOR THE EVAPORATOR DRAIN TUBE HOLE USE SHOP VAC TRY VACUUM DEBRIS AND TRASH BUILD UP OUT OF DRAIN TUBE HOLE SEE WHAT HAPPENS.

Sep 30, 2011 | 1994 Pontiac Grand Prix

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My 2003 Saturn L-Series is leaking cool water into my passenger floorboard. I think the AC drain is clogged, and I need to know where the drain is located.


Guys at oil change locations are usually good at this and have some heavy gauge long pipe cleaners just right for the job. Easier to do from underneath, drain is below the heater hoses.

Jul 11, 2011 | 2001 Saturn L-Series

1 Answer

1997 Chevrolet Camaro; water in passanger floor.


Hello Friend:

You said it was Just Water & not Anti-Freeze, Sounds like your Air Condition Drainage Hose off the Evaperator is Plugged.

1- Way to Find out is Start your Vehicle and Look under the Passenger Side see if your getting a Fairly Good Flow of Water out of the A/C Drain Tube. Run it on Max Air and High Fan.

You can Also Try this Turn on your Heater and Take a Look inside on Passenger Floor.

Hope This Helps you Let me Know if you Would of the Quality of the Solution i gave You.

Thanks For Using FIXYA From: d_hubbs

Jul 16, 2010 | 1997 Chevrolet Camaro

1 Answer

Either a leaking hose going to the heater coil or a bad heater coil. Water gets inside car on front floorboard.How do I replace heater coil?


To be honest, most mechanics hate replacing heater cores because of their location. They are usually on the firewall on the inside of the car underneath the glove box under the dashboard and behind a plastic black cover. If you look under the hood at the firewall on the passenger side, you should see on inlet hose and one outlet hose which should be replaced along with the heater core. They must be removed first before you can remove the heater core. Basically you have to lay on your back on the passenger side Front) floorboard, remove the necessary panels to get to the cover, remove the heater core and install the new one first, then intall the new hoses, reinstall the cover and any panels you removed. Lastly, be sure to bleed and top off the coolant while you run the heater, then check for leaks

Apr 28, 2010 | 1997 Pontiac Grand Am

3 Answers

How do i know if heater core is leaking?


if you have a puddle of water on your floorboard and you dont know where its coming from that would most likely be your problem because the same thing happened to my cavalier and i had to replace it its in the plastic shroud behind the middle console towards the bottom and the 2 heater core hoses you can see if you pop your hood and look behind the motor around the area where your rack and pinion is they arent hard 2 miss theyre 2 small hoses right next to each other and theyre easier to get off from underneath the car

Oct 19, 2009 | 1994 Chevrolet Cavalier

2 Answers

2004 Chevrolet Tahoe-front passenger side floor is wet


Check the heater core unit located underneath the dashboard on the passenger side of the vehicle. Even though your car's antifreeze is red, it may appear to be clear when there is only a small amount present. Was the liquid in the vehicle sticky and have any smell to it?

Aug 02, 2009 | 2004 Chevrolet Tahoe

1 Answer

Water in passenger floorboard


Is it antifreeze, or water? If you have been using your air conditioning, it could be condensation running in because the drain is plugged. Check it closely before you rip out your heater core, because, yes, sometimes that can be a big job.

Jun 07, 2009 | 1998 Jeep Grand Cherokee

1 Answer

Over heating


it is most likely your heater core possibly the hose connection but really its the heater core

Apr 20, 2009 | 1989 Oldsmobile Eighty Eight Royale

2 Answers

Water leak on the passenger side


were at on the passenger side? If its in the front floorboard,passengers side.the heater core may be leaking antifreeze.Also the a/c drain it also located in the same area.check your antifreeze,if not low,drive for a few miles with a/c on,stop on dry level place.there should be water dripping under passengers front.that is were the a/c drain is supposed to be.

Aug 12, 2008 | 1999 Plymouth Voyager

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