Question about 2003 Chevrolet Silverado 1500

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How to replace heater core in 2003 chevrolet truck

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

chiquititas
  • 1010 Answers

SOURCE: heater core on a 2003 Chevrolet pickup 4 wheel drive crew cab

if you have air conditioning you will need to take it to a garage and recover the r134, you will need to remove the dash to allow you to remove the heater box, it's an ugly job, I've done a dozen or so and can do it in about 6 hours now, the first time it was closer to 11 hrs, good luck

Posted on May 15, 2008

leetamara
  • 702 Answers

SOURCE: 1998 chevrolet k-1500 heater-core replacement

Remove the heater hose clamps and the hoses from the engine side of the firewall. From the inside under the dash on the pass. side, remove the lower panel screws and slowly pry the lower cover down and the heater core will slide out of the heater box. Installation is reverse of removal.

Posted on Sep 20, 2008

tripletauto
  • 1450 Answers

SOURCE: 1999 S10 Chevy truck

you will have to remove the dash assembly and then the heater/a/c box it is in the hvac module.

Posted on Oct 02, 2008

  • 82 Answers

SOURCE: bad heater core

look undre the passenger side dash and you will see a black box. Look closely and you will see screws in it around the edges. remove all the screws then remove the cover,there is the heater core, held in by 1 screw that is kinda hard to see. next look under the hood on the passenger side firewall right in front of the dash, you will see 2 hoses with clamps on them. loosen the clamps and remove the hoses. you may want to drain the radiator first but I never do

Posted on May 05, 2009

msbigdog7
  • 332 Answers

SOURCE: replace heater core in 2006 chevrolet HHR

Just like all other vehicles open hood and remove the bolts on the fire wall around the fan the fan will be bolted to the metal plate that is hiding the heater core.Know im not talking about the fan removel im talking about the plate the fan is bolted to.

Posted on Jan 03, 2010

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1 Answer

Replacing rear heating coil in a 2003 Chevrolet suburban


i am assuming you mean heater core, you have to remove the pass rear cargo trim panel and any trim that interlocks to it as well as any connectors then the heater box and hoses from under the vehicle as well as if it has rear ac the ac system needs to be discharged first and those lines removed as well, then remove the box from the vehicle and seperate the case halves and replace the core, the reinstall in the reverse order of removal

Jan 15, 2013 | 2003 Chevrolet Suburban 1500

1 Answer

How to replace the heater core to a chevy astro 2003


  1. Drain the engine coolant.
  2. Reposition the outlet heater hose clamp at the heater core.
  3. Remove the outlet heater hose from the heater core.
  4. Reposition the inlet heater hose clamp at the heater core.
  5. Remove the inlet heater hose from the heater core.
  6. Remove the screws that retain the cover to the heater case assembly. This is located underneath the dash on the passenger side.
  7. Remove the straps that retain the heater core to the heater case assembly.
  8. Remove the heater core from the vehicle.

Sep 05, 2011 | 2002 Chevrolet Astro

1 Answer

Changing a heater core


If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Dec 13, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Heater core replacement


Heater Core Removal & Installation To Remove:
Heater core removal gm-10-00-651.gif

  1. Remove the heater/vent module.
  2. Remove the heater core access cover screws.
  3. Remove the heater core access cover.
  4. Remove the heater core from the heater/vent module
To Install:
  1. Install the heater core to the heater/vent module.
  2. Install the heater core access cover and screws to the heater/vent module.
  3. Install the heater/vent module assembly to the vehicle.
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Oct 08, 2010 | 2003 Chevrolet Blazer

1 Answer

Need instructions for replacing heater core on 2003 Chevy S-10


The heater core may be behind the dashboard,passenger side. If you have never taken one out before,it may be best to take the truck to a shop.

Dec 30, 2009 | 2003 Chevrolet S-10

1 Answer

I am need to replace the heater core in my truck. I have the dash out but can't get to the heater core


Not certain about yours, but some trucks have a "drip pan" that covers the heater core.

Dec 13, 2009 | 2003 Chevrolet S-10

1 Answer

Heater core is clogged, not hot heat coming out.


you can try to flush it out by removing both heater hose going into the core and coming from the core. Hook a garden hose to the hose going in and then try flushing the hose going out. Normally once a heater core is clogged there is only the option of replacing it.

Oct 06, 2009 | 2003 Chevrolet S-10

1 Answer

2003 malibu


A heater core is located behind the dash on the passenger side. If you look under the hood you will see 2 heater hoses going to the fire wall again, on the passenger side, your heater core is located behind the hoses. You will need to take the dash loose or off to get to the air box the heater core rides in.

Mar 01, 2009 | 2003 Chevrolet Malibu

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