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How to replace a heater core in a 1980 chevy c10 silverado

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 231 Answers

SOURCE: Heater Core

1) disconnectnegative battery cable
2) remove coolant reservoir
3) dis-connect heater hoses from heater core and plug holes in heater core, some coolant will drain out
4) remove mounting bolts and nuts on fire wall
5) remove glove box liner and door
6) lable and dis-connectheater controls
7) dis-connectand remove computer and mounting bracket
8) move radio antenna wire
9) remove kick pannel and un-bolt lower corner of dash
10) remove screws and nuts holding the housing inside the cab
11)remove the heater housing from the vehicle
12) detatch the core retaining straps and remove the heater core
13) installation is this procedure in reverse
I hope that this fixes your problem good luck and please take the time to rate this response.

Posted on Oct 17, 2008

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Shouldibuyit
  • 44 Answers

SOURCE: replace heater core 1994 chevy g20 conversion van

Here a are the instuctions to remove it. I did not know if you have A/C or not so I included both for you.

REMOVAL & INSTALLATION
Without Air Conditioning
ALL MODELS
See Figure 1

  1. Disconnect the negative battery cable.
  2. Remove the coolant recovery bottle.
  3. Place a pan under the van and disconnect the heater intake and outlet hoses. Quickly remove and plug the hoses and support them in an upright position. Drain the coolant from the heater core into the pan.
CAUTION When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
  1. Remove the heater distributor duct-to-case attaching screws and the duct-to-engine cover screw. Remove the duct.
  2. Remove the engine cover.
  3. Remove all the instrument panel attaching screws.
  4. Carefully lower the steering column. Raise and support the right side of the instrument panel. Refer to for further details.
  5. Remove the defroster duct-to-case attaching screws and the two screws attaching the distributor to the heater case.
  6. Disconnect the temperature door cable. Carefully fold the cable back and out of the way.
  7. Remove the three nuts from the engine compartment side of the distributor case and the screw from the passenger compartment side.
  8. Remove the heater case and core assembly.
  9. Remove the core retaining straps and remove the core.
To install:
  1. Install the core.
  2. Install the core retaining straps.
  3. Install the heater case and core assembly.
  4. Fasten the three nuts on the engine compartment side of the distributor case and the screw on the passenger compartment side.
  5. Connect the temperature door cable.
  6. Install the defroster duct-to-case attaching screws and the two screws attaching the distributor to the heater case.
  7. Install the steering column.
  8. Fasten all the instrument panel attaching screws.
  9. Install the engine cover.
  10. Install the duct. Install the heater distributor duct-to-case attaching screws and the duct-to-engine cover screw.
  11. Connect the heater intake and outlet hoses.
  12. Fill the cooling system.
  13. Install the coolant recovery bottle.
  14. Connect the negative battery cable.
1990-95 MODELS With A/C

  1. Disconnect the battery ground cable.
  2. Remove the engine cover.
  3. Remove the steering column-to-instrument panel bolts. Lower the column carefully.
  4. Remove the upper and lower instrument panel attaching screws. Remove the radio support bracket screw.
  5. Raise and support the right side of the instrument panel.
  6. Remove the lower right instrument panel bracket.
  7. Remove the vacuum actuator from the kick panel.
  8. Disconnect the temperature cable and vacuum hoses at the case. Remove the heater distributor duct from over the engine hump.
  9. Remove the two defroster duct-to-firewall attaching screws below the windshield.
  10. Under the hood, disconnect and plug the heater hoses at the firewall.
  11. Remove the three nuts and one screw (inside) holding the heater case to the firewall.
  12. Remove the case from the van. Remove the gasket for access to the screws holding the case together. Remove the temperature cable support bracket. Remove the screws and separate the case. Remove the heater core.
To install:
  1. Install the heater core.
  2. Assemble the case and fasten the screws.
  3. Install the temperature cable support bracket.
  4. Position the gasket, then install the case in the van.
  5. Fasten the three nuts and one screw (inside) holding the heater case to the firewall.
  6. Connect and plug the heater hoses at the firewall.
  7. Fasten the two defroster duct-to-firewall attaching screws below the windshield.
  8. Install the heater distributor duct.
  9. Connect the temperature cable and vacuum hoses at the case.
  10. Install the vacuum actuator at the kick panel.
  11. Install the lower right instrument panel bracket.
  12. Fasten the radio support bracket screw.
  13. Fasten the upper and lower instrument panel attaching screws.
  14. Fasten the steering column-to-instrument panel bolts.
  15. Install the engine cover.
  16. Connect the battery ground cable.
  17. Refill the cooling system as necessary.

Posted on Nov 28, 2008

boscia
  • 163 Answers

SOURCE: replace a heater core in 2000 chevy blazer

it is located under the dashboard against the firewall of the passenger seat. i recomend buying a repair manual from your local auto parts store before attempting as it requires draining, flushing, refilling and bleeding the cooling system as well as removing many other componets like the entire dashboard and thermostat

Posted on Dec 01, 2008

  • 289 Answers

SOURCE: How to replace a heater core in a 1994 chevy 1500

As with all vehicles it seems the first part that they build around is the heater core. It is under the dash above the floor housed in a black plastic sealed box. Sealed with goop. Locate that box and start removing everything around it that is peventing taking the cover off. Of course disconnect the heater hoses under the hood a thefirewall.

Warning it is never as easy as it sounds.

Posted on Nov 29, 2009

Jim1969pa3
  • 152 Answers

SOURCE: I have a 1999 chevy silverado and I need to change heater core

Not a whole lot different. Just need to keep removing plastic down at the heater until you get to the heater core. Then disconnect it on the firewall side.

Posted on Dec 22, 2009

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1 Answer

Where is the heater core located on 1999 chevy silverado 1500


I have a Late 1999 Chevy Silverado C1500 Z71. I had one of the heater hose nozzle snap off this past weekend. I looks like the heater core hase some kind connection fitting. And I had the same situation!

Feb 10, 2012 | 1999 Chevrolet Silverado 1500

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I just got a 1999 chevy silverado 2wd and the temp reaches 210 but the air dosnt blow hot


1.)heater core restricted-check both heater hoses coming from the heater core if one is cold your heater core is restricted and you will need to flush the core.
2.)Your air mix door actuator in the vehicle is inoperative and you will need to replace it.It is located on the bottom of the heater case in the center of the vehicle.It mounts straight up with a couple bolts.

Dec 23, 2010 | 1999 Chevrolet Silverado 1500

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How do i replace the heater core on a 2001 chevy silverado 2500


pull the dash off theres the heater core on passenger side theres a inlet and outlet hose pull both off remove mountin bolts install new one reassemble dash

Sep 13, 2010 | 2001 Chevrolet Silverado 2500

1 Answer

How do I replace heater core in 98 chevy silverado? Heater blows fine, just not getting hot.


before you think it is your heater core try replacing your thermostat or flushing your system your heater core could be clogged feel the two hoses going into the heater core at the firewall they both should be hot

Jan 17, 2010 | 1998 Chevrolet C1500

2 Answers

How to replace a heater core in a 1994 chevy 1500


As with all vehicles it seems the first part that they build around is the heater core. It is under the dash above the floor housed in a black plastic sealed box. Sealed with goop. Locate that box and start removing everything around it that is peventing taking the cover off. Of course disconnect the heater hoses under the hood a thefirewall.

Warning it is never as easy as it sounds.

Nov 29, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Antifreeze leaking into cab under glove comp.


heater hose or heater core you can solder the heater core if you can find the leak oh and if the rest of it is good

Nov 22, 2009 | 1984 Chevrolet Chevy

1 Answer

My heater in my 2005 chevy silverado is blowing warm air but not hot


Your heater core is probably getting plugged up. THis is a common problem with any car as the flow through the heater core is not as much as through a radiator which causes silt deposits in the inside of heater core itself. If you replace that your problem should go away. You should be able to feel a difference in temperature of the coolant in the supply line versus the return line going to the heater core. If there's a dramatic difference then the core is plugged.

Nov 20, 2009 | 2005 Chevrolet Silverado 1500 2WD

1 Answer

How tough is it to replace heater core on '85 chevy c10?


shouldnt be hard at all on pass side under dash being a truck you should have plenty of room. line run thru fire wall and hook up to rubber hose under hood 1 hour at the most

Oct 30, 2009 | 1985 Chevrolet Chevy

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