2005 Chevy Tahoe WATER LEAK

BUCK5

MEMBER
2005 CHEVROLET TAHOE
V8
2WD
AUTOMATIC
65,000 MILES

I HAVE RAIN WATER LEAKING INTO THE FRONT PASSENGER FLOOR BOARD OF MY 2005 TAHOE. The water is clear and is not antifreeze. My Tahoe is several years old and the leak started several months ago. The local dealer used compressed air to clear the air condition condensation tube from the discharge end, but the leak continues when it rains. I was told by the dealer that the condensation box is uncoverded, collects rain water and overflows due to the drain hose being too small. The dealer says it would cost about one thousand dollars to cap the condensation box to prevent the entry of rain water. The water drips from the interior cowling that surrounds the heater coil area. I believe the condensation box may be full of debris causing the drain hose to be blocked. The dealer has yet to access the condensation box.

3 Replies

IMPALASS

MECHANIC
3,112 POSTS

Hello -

I am very sorry to hear of this problem you are having.......I apologize as I am not sure what your question is you would like me to try and answer.

Please make sure you provide your engine size in liter and the 8th digit of your VIN.

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Wednesday, January 7th, 2009 AT 4:51 PM

BUCK5

MEMBER
2 POSTS

THE MOTOR SIZE IS VORTEC 4800 V8. THE EIGHTH VIN # IS "T". MY QUESTION IS WHERE DO YOU BELIEVE THE WATER IS COMING FROM? WHAT CAN BE DONE TO RESOLE THE WATER LEAK? I AM NOT SURE THE DEALER IS CORRECT IN REFERRING TO CONDENSATION BOX OVERFLOW AS THE CAUSE OF THE INTERIOR WATER LEAK. THANKS

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Thursday, January 8th, 2009 AT 6:00 AM

IMPALASS

MECHANIC
3,112 POSTS

Hello -

Hey thanks for the info...........

I reviewed all the TSBs and didn't see anything on your specific vehicle stating this problem. However.........I believe you both may be correct.........

I just worked two vehicles last week with similar problems..... Different models makes.

One....... They actually had a TSB out that debris would collect and back up and cause the rain water to run through the HVAC system and actually blow on the windshield on defrost and leak on the floor boards. Some would be the passengers side some the drivers side. You know how water is....... It goes everywhere.

Another was the vents/drains coming through the firewall..... Driving no water, sitting the rain would go down the firewall and run through due to the caulking and seal were not holding.

Another several weeks prior to that the info on the vehicle said to remove the outside vent are next to the windshield and see if there is separation down by the HVAC vent area.

My suggestion.......I would first look at the firewall my self and inspect for any areas coming through the firewall and check the seals caulking plugs etc. Then the vents up by the windshield area where they enter the car.......

Get inside... Have someone run a water hose down different spots on the firewall slowly..... And just watch and listen, next move up to the middle of the windshield on the drives side, then the passengers......... Look around in that area for debris... You may be able to drop the blower fan and stick your hand up there and see if it is clogged.....

I would do all of this first. Then either let us know what you find or then go back to the dealer for the fix.

To me. That is a little pricy.I show labor about $500 to replace a evaporator core and that includes removing the dash. I would have them break the charge down for you and let us know what the itemized cost is. Maybe I am missing something.

I hope this helps.........

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Thursday, January 8th, 2009 AT 8:11 AM