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  #1  
Old 10-28-2008, 09:47 AM
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chigowolfs chigowolfs is offline
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2005 Chevy TrailBlazer LS
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Replacing heater core

Ok, 05 TB LS v6

Since it has started getting colder out I have been using the heat. Found out I have that lovely coolant smell in my car when I am using the dash vent. I have not noticed it using the defrosters or the floor heat. Well my spidy senses tell me that my heater core is leaking. I know if I used stop leak it will be useless, so my next choice is replacing it. I can get a new one for 71.00 with shipping from GM parts Direct. Well this brings me to the question WTF is involved with replacing it.
Anyone happen to have step by step instruction on replacing it. Or should I just take it to a dealer, which I am trying to avoid.

Any help greatly appreciated.
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  #2  
Old 10-28-2008, 11:20 AM
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Irish2685 Irish2685 is offline
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2003 Chevy TrailBlazer LTZ
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Don't know about the TV, but my Jimmy was a b****. Had to remove the driver's seat, drop the steering column to the floor, and take the entire dashboard off. Took about 8-9 hours by myself, but it was worth the savings. Had about $60 in to it (including the Haynes), but the fix-em-up guy wanted $800+.

It is doable, but the best advice I can give you is BUY A HAYNES (or similar) manual and read that. Also, make sure you keep track of EVERY single bolt, etc... that you remove. I had a few left over when I was done with mine, and could have avoided that if I took my time and marked everything. Hope this helps, and good luck
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  #3  
Old 10-28-2008, 11:21 AM
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MAY03LT MAY03LT is offline
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The HVAC assembly has to come out....labor is around 7 hours.

Are you losing water? Do you have access to a coolant system pressure tester? I find it unusual that it only happens in panel mode
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  #4  
Old 10-28-2008, 11:55 AM
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JFSebastian JFSebastian is offline
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Seems like it would be early for an '05 to have a heater core problem. With no leak on the floor, how do you know it is not a leak under the hood? Your vents could be pulling in the smell. Also, did you recently put coolant in? If overfilled, it could be the overflow. For such a difficult job, I would try to rule out the simpler stuff.
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Old 10-28-2008, 12:05 PM
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chigowolfs chigowolfs is offline
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Ok, I have not touched the coolant system and or any hoses attached to it since last winter or early spring this year.
It has me confused why I only get the smell from the panel vents also and not anywhere else, but if I move temp controls all the way to cold, no smell from the panel vents. I have to remeber to check the carpet in the front to see it has a damp feeling. I have not noticed and puddles or anything under the truck. the smell seems to go away at idle, sat in my truck at lunch yesterday, smelled it going to pick up lunch, and coming back, but if I remember after about 20 mins of idleing with the heat on the smell went away.

I do not have access to a pressure tester, I guess I can rent one from the zone....
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  #6  
Old 10-30-2008, 10:48 AM
mike_kh2410 mike_kh2410 is offline
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Hi
what happened with your car?
how did you fix this problem?
I am having the same problem with my car.
thanks
Michael
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  #7  
Old 11-02-2008, 09:03 PM
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Sorry guys I have been busy between working and finishing up school.
Ok back to my problem, it is the front heater core, It has been nice here so I have not been using the heat. but come friday after the TB warmed up I turned the heat up and I had steam coming out of only the two driver side vents.... So far nothing is wet inside the truck, carpeting is dry, and I ran my hand along the firewall on the passenger side and I didnt feel nothing wet..... So I hope it can hold out for a few more weeks. Right now I am just using the the passenger side heat while leaving the drive's side on cold.... this stops the antifreeze smell
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Old 11-03-2008, 10:37 AM
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It definitely sounds like the heater core except for where you said that putting only on the passenger side stops the coolant smell. If it all runs through the same heater core, how does one vent smell and the other doesn't?
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  #9  
Old 11-03-2008, 11:06 AM
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How long have you had the TB? Could a past owner gotten antifreeze on the drivers side while replacing the core?
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  #10  
Old 11-08-2008, 12:00 AM
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chigowolfs chigowolfs is offline
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Ok well scratch what I have said previously....
I now get the coolant smell thru all the vents and windshield if fogging badly. I ordered a new core today from gmpartsdirect so I should receive it sometime next week.... I know what I will be doing next weekend WOOT!!!

I have had the TB for almost 2 years now, and this is my second winter with it, so hey all is good $h^t happens right?!!!?
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