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Heater core?

Tiny
SIS SWINDALL
  • MEMBER
  • 2000 CHEVROLET BLAZER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
How do yo remove the dash to replace heater core?
Monday, September 7th, 2009 AT 5:27 PM

51 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_945.jpg

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Monday, September 7th, 2009 AT 8:40 PM
Tiny
LJK730
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
My husband needs to replace the heater core in his 2000 2DR, 4WD blazer with AC, which presently has about 80,000 miles. However, and understandably, he is a little concerned as to how involved this will be because he will need to remove the steering column and dash. Any suggestions/recommendations? Please! And thanks!
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Wednesday, August 19th, 2020 AT 8:15 PM (Merged)
Tiny
LOSONE
  • MECHANIC
  • 1,616 POSTS
It is about an 8 hour rough job for an experienced mechanic. For a novice about 3 days
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Wednesday, August 19th, 2020 AT 8:15 PM (Merged)
Tiny
QUIETSOUTH
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
How much is it going to cost to get the heater core replaced? Or how can I replace it my self?
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Wednesday, August 19th, 2020 AT 8:15 PM (Merged)
Tiny
SWILLIAMS
  • MECHANIC
  • 597 POSTS
300-600 dollars depending on the shop. You can DIY if you want. You basically need to pull the dash out and then R&R the core. I would say that you want a copy of the service manual to determine if you wish to do it. Mitchell online works pretty well and it's worth the money.
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Wednesday, August 19th, 2020 AT 8:15 PM (Merged)
Tiny
LOISENGLENY
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
Heater problem
2000 Chevy Blazer 6 cyl Two Wheel Drive Automatic

Hi! My heater core went and I am having someone replace it. He has had my vehicle for two days now. I called today and he stated that he can't get the heater box out of the way to get to the heater core. He says he only found two bolts. Where are the others? Please help. My truck has been broken down for weeks.I need my ride! :(
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Wednesday, August 19th, 2020 AT 8:15 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Here's a tip to give your repair person.

" I started by taking the hoses aloose. Then move the blower resister. Look down in there---unscrew a bolt going the firewall into the blower housing. There is a stud coming through the firewall in the middle. Takes 7/16 socket--take care of that one. Now go to the inside and take the whole dash and put it in the backseat. Scews at the top. A 10mm headed bolt on each side. Drop the column down. Need to do some unplugging. Remove glovebox and you got a big electrical connector-use 7mm socket. A vac. Connector. Get some slack going for the ant. Cable. IMPORTANT-- Take aloose one connector at bcm(plastic box in middle). The one at the top going to dash.I almost pulled it by the roots. After pulling the dash back a little you will see a connector on driver's side with big wires---get it. And get the ant. Cable out the back of radio. None of this bad to do. The housing has a 10mm headed bolt at bottom and two screws coming in backwards through the firewall. Undo the bolt. I used a hammer and big screwwdriver on the other two underthere. Yank back-do the core"

See if that helps them out.
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Wednesday, August 19th, 2020 AT 8:15 PM (Merged)
Tiny
PERCYK
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 178,000 MILES
I think our heater core is the problem, but Im not a professional so I am here. Ha! Anyway. When I turn on the heater, the windows get fogged up and so I bought a heater core thinking that was the problem. But now I have no idea of how to replace this thing so I am asking you?
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Wednesday, August 19th, 2020 AT 8:16 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Heres the best way to describe how to replace heater core in a 2000 blazer..


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_1754.jpg

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Wednesday, August 19th, 2020 AT 8:16 PM (Merged)
Tiny
MREEP
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
Heater problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic 81, ooo miles

I need to replace heater core in 2000 blazer. I have the part but it looks like I have to pull whole dash out. I have had to replace ingine and just replaced the raditor so dont have the money to pay some one to do it. Please HELP!
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Wednesday, August 19th, 2020 AT 8:16 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_1999.jpg

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Wednesday, August 19th, 2020 AT 8:16 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 2000 CHEVROLET BLAZER
  • 180,000 MILES
Heater will not put out heat, checked all the fuses and replaced one 10 amp, but for some reason water does not seam to be getting to the heater core? Any ideas, water relays something like that!
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Wednesday, August 19th, 2020 AT 8:16 PM (Merged)
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
There is a heater actuator that lets either coolant in the core and/or opens the vent door for the heat. You will find controlling vacuum pots, cables and actuators on the heater box under the center of the dash. I am attaching instructions for low heat output. When it says heat output test that just menas is it putting out hot air.
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Wednesday, August 19th, 2020 AT 8:16 PM (Merged)
Tiny
IMTHEWALRUSS
  • MEMBER
  • 1 POST
  • CHEVROLET BLAZER
I just bought a 2000 Chevy S-10 Blazer 4.3L 2WD. The a/c blows really cold but it emits an awful odor and smoke or fog. When I turn the thermostat to a warmer setting, the smoke gets worse. I have flushed the radiator and it does not overheat. It smells a lot like antifreeze. I'm thinking it might be the heater core, but there's no visible leak inside the cab. The smoke comes out through the a/c vents. I don't claim to be good at working on vehicles, but if I can repair this myself and save the cost of having it repaired I will. However, looking in a repair manual at replacing a heater core (if that's even the problem) it seems like quite a task.
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Wednesday, August 19th, 2020 AT 8:17 PM (Merged)
Tiny
MIKE H R
  • MECHANIC
  • 3,094 POSTS
Check around the hose connections on the firewall first. See if there is any kind of leak. If none found then the heater core is leaking. It is a job to do, it tkes time but one could do it. Check the hoses first. One could be letting it leak go to the inside.
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Wednesday, August 19th, 2020 AT 8:17 PM (Merged)
Tiny
UNIQUE DIVAH
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 18,644 MILES
How do I put in a heater core? Its leaking antifreeze and putting a black soot on my wind sheild.
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Wednesday, August 19th, 2020 AT 8:17 PM (Merged)
Tiny
DENNYP
  • MECHANIC
  • 1,824 POSTS
Takes around 7 hours or so. You will need a good service manual. Below is a link to one.
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Wednesday, August 19th, 2020 AT 8:17 PM (Merged)
Tiny
DAVID KENWARD
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
Heater problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Manual

I have to replace the heater core, evry mech. Shop around town wants to charge almost $600.00 to do it, saying they have to completly remove the dash to do it. Is this true and if so, is there an easier way I can do it myself at home?
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Wednesday, August 19th, 2020 AT 8:17 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
It is true and there is no easy way to go about it, the entire dash has to come out
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Wednesday, August 19th, 2020 AT 8:17 PM (Merged)
Tiny
TJ DOPORTO
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 173,069 MILES
I would like to know how to open the evaporator box on a the vehicle listed above (s10) in order to change the heater core?
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Wednesday, August 19th, 2020 AT 8:18 PM (Merged)

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