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post #1 of (permalink) Old 09-27-2017 Thread Starter
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2007 Impala LS - water leak under glove box

2007 Impala LS, 3.5 Flex
Early last week, we had a couple of days of heavy rain. This weekend I discovered the front and back passenger floors soaked with about a gallon of water (not coolant - only water). After I vacuumed up the water and attempted to dry out the rugs, I found more slowly dripping into the car. Water is coming from under the glove box, above and behind the bunch of wires protruding from where the rug meets the dash.

I replaced the cabin air filter, cleaned out the cowl area (although I did not remove the wipers to do a completely thorough clean out on the drivers side). Water deflector, cowl and weatherstripping are all in good shape, blower had 1 leaf inside it. I then attempted to clean out the ac drain line - located the elbow on the firewall and found no debris clogging it and tried to use compressed air to clear the drain tube. Not sure if it's clogged.

Few days later, water is still dripping onto passenger rug. I have driven very little and not used the defrost or ac or vents. Car has had a lot of condensation lately.

Please help. Supposed to get more rain tomorrow.
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post #2 of (permalink) Old 09-27-2017
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When I had a water leak, I started with a hose without a nozzle on it, and sprayed everywhere there was a seal. Mine ended up being a bad rear windshield seal.
I would make sure the blower and everything is dry, then spray the hose all around, then check again and see where the water has traveled. There isn't a good or easy way to do this, but it needs to be done.
Also make sure no thru-firewall seals have been compromised. Maybe water is dripping behind the hood and getting through the thru-firewall openings. Just some ideas.
Welcome to the forum BTW
Got any pics of your ride?
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post #3 of (permalink) Old 09-28-2017 Thread Starter
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Car was is desperately in need of a bath as I have a tree in my yard that sheds a lot sticky residue and debris. I rechecked the weatherstripping, water deflector, blower, etc. and washed the car. No water leaked in! No drips last night and no drips tonight either and I drove about 70 miles today. Strange.

Re pics: I have pics posted in "my garage" of our 1970 impala convertible - my silver 07 (former unmarked VT State Trooper's car) can be seen in the background. I'll find /take better pics tomorrow.

Thanks for the reply - I've always gone to my kids' father with car issues and he usually fixes (or attempts to fix) the problem, while I assist by fetching tools. Tired of waiting, I thought I'd try to solve this on my own, as I have other projects I need to finish or start (i.e. Prepping and painting the outside of my house, changing our pipes over to pex, etc.).
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post #4 of (permalink) Old 2 Weeks Ago
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Wonder if the passenger window was slightly cracked...
Usually leaks like that can be attributed to a windshield seal opening someplace (this isn't terrible expensive, you'd have to take it to a glass shop and ask them how much they would charge to reseal your windshield, probably run around $100...) The other possibility would be a clogged or badly aimed A/C condensation run-off hose, that's a rubber tube that comes out of the firewall and allows the condensation from the a/c's evaporator to drip outside the car... Fixing this is generally easy but you have to locate that rubber tube... Sometimes the tube is clogged, other times it just isn't aimed proper and water can't rightly drain, when that happens it will drain inside your cabin usually on the passenger side.

Granted it could be the condensate isn't draining from the evaporator proper which would localize the problem to the interior of the dashboard, if that is the case then things can get rather involved...
It is however not too much a feat to narrow this down as it specifically has to do with a/c operation, if you keep the a/c off there should be no water.
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