Question about 1999 GMC Jimmy

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Water under pasenger side carpet not from heater core

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Find the drain for the A/C located under the hood, firewall, nearest the bottom of the firewall. It will be a black tube and if plugged, the condensation from use of the A/C (which also turns on when the defrost is used to evaporate moisture) will back up into the blower box and drain onto the floor. Long term effects include; rotted floor board, mildew, shorted blower motor and loss of effective defrosting, heating and cooling. Use a coat hanger or other long thin item to clear the drain and allow the water to drain. The system will be much more efficient. Let me know if you need anything else.

Posted on Nov 08, 2010

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1 Answer

Test heater core


Robert,
Using a cooling system pressure test tool to pressurize the entire cooling system, a heater core will leak into the HVAC [heater, ventilation and air conditioning] box [located under the dash board]. Once coolant leaks into this box, it will either drop onto the carpeting on the passenger side front floor OR drip out the condensate tube [where the A/C condensate water leaks out under the truck] The condensate tube is a rubber pipe located on the lower end of the passenger side firewall.
Leakage into the passenger carpet [most common place for it to leak] will appear as a wet carpet.
If heater core replacement is required, do yourself a favor. Buy and install a new A/C evaporator [located in the HVAC box with the heater core] at the same time. This is a big job to do. No sense replacing the heater core now, only to have the A/C evaporator fail next summer, forcing you to repeat all that labor [8 hours for a pro mechanic who knows what he is doing].

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99 grand caravan ..carpet is soaking wet on passenger side and in to the rear on the passenger side. I bypassed the heater core on the drivers side but still continues to leak water and antifreeze. Is...


Under the hood is a drain for the cowling under the wiper arms. There is a plastic tube that gets clogged and water can't drain from that area. It is against the firewall on the passenger side. I found mine full of pine needles

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Water leaking onto passenger side floorboard,soaking the carpet


Your heater core has developed a leak - the wetness on the passenger side carpet is engine coolant
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Your strategy: disassemble dash down to heater core, determine whether you'll need a new heater
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1 Answer

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if your smeling it you car and a greasie film is on the inside windsheld or check for water on the pasenger floor board pull back carpet and check for leaks it may be yuor heater core this happen to me twice

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2 Answers

I have water mostly under my driver front side floorboards. There is some water under the passenger side but only about 1/4 of what is on the driver side. I am not sure where the water could be coming...


is it water or anti-freeze
if it is anti-freeze i would have to say your heart core is leaking bad
also check you engine coolant and see if you have lost any
get back to me and leave some feed back
hope i was a help

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1 Answer

I have no heat in the winter and it sounds like i got water in my dashboard.


Most likely a bad heater core. It's behind/under the dash. There should be two hoses that go into the firewall under the hood. These carry and return warm coolant to the heater core. The blower motor blows across the heater core and pushes the warm air into your car. Try feeling the carpet under the dash on the passenger side. See if it's damp. Many times if the core starts leaking, your carpet will be damp over there. I've also seen them completely plugged up with dust/dirt/debris/insects, so the air wouldn't flow through it from the fan.

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1 Answer

Smelling antifreeze inside cab of 2000 gmc jimmy


Chanses are that little hole will turn into a big hole its only a matter of time, its not that hard, don't be inteminated by it, even if you have never done one before. Chk. the carpet on the pasengers side floor see if its wet, anyhow if you can smell antifreeze thats what it is heater core.

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2 Answers

Water leak passenger side in dodge caravan 2005 carpet soaked


look at the firewall on the engine side and you will see a small stub hose coming out on passenger side about even with the bottom of the heater box inside. that hose drains condensation from the ac...clear it out and you will have a dry floor. (unless heater core is leaking but you didn't mention any overheat or coolant loss so likely that's not a problem)

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2 Answers

Coolent leak on fire wall in engine compartment on pasnger side


Hi , if you lift up your passenger side floor carpet and check underneath if there any coolant. If it`s dry you know the leak is in the engine bay ,if it`s wet could be either inside or outside of the firewall. In the engine bay check the hose clamps on both side of the hose if you can tight them or if one a those spring clamps try to reposition them. If you have hose clamp right at the firewall then you can easily change the hoses otherwise you have to access it from under or worst case behind the dash. Hope that helps.

May 29, 2009 | 1997 Pontiac Grand Am

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