Question about 2003 Chevrolet Suburban 1500

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How to replace heater core on a 1989 Chev. 1500 (350)

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ALMOST HAVE THE DASH OUT TO REPLACE EVAPORATOR. HANDLE ONTHE DASH WILL NOT COME OUT TO
GET THE TOP TRIM OUT SO I CAN GET THE LAST 2 OF 4 BOLTS OUT OF THE DASH FRME???????

Posted on May 03, 2011

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  • Chevrolet Master
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Start by draining the coolant, disconnect dash board wiring harness from pcm behind kick panels, disconnect eye shaft, unbolt dashboard and remove dash. (Remember to tape steering wheel in place as it might have a clock spring). You might have to remove some trim panel on top of dash or cluster from dashboard to gain access to retaing bolts, disconnect heater hoses from heater core in engine compartment and remove heater core, reverse install.

Posted on Dec 02, 2008

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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

shocktroop40
  • 155 Answers

SOURCE: how to replace heater core in 2002 chev s-10

Well first, if your talking about the radiator hoses when you say the bottom hose is warm and the top is cold, that would suggest to me a stuck thermostat. If not, then the heater core is located inside the truck under the dash. You can follow the heater hoses under the hood to the firewall and that will tell you where, under the dash the core is located. It is kind of a big job, as all the under dash covers will need to come out as well as the glove box. The heater core is inside the heater box, a black plastic box that will also need to be removed. It is important to note that when you are reinstalling the heater box after you change the core, it must be completely sealed, either with RTV or two sided insulating tape.

Posted on Feb 14, 2010

Thompsons196
  • 350 Answers

SOURCE: how to replace the heater core on 02 chev cavlear

  1. Remove top of dash pad, do this by removing several screws located under the foward lip of the pad, don't forget the screws in the defroster vent holes!
  2. Remove the lower trim panel from the underside passenger side dash ( if there is one there)
  3. Look under the dash on the passenger side and you will see the plastic box in which houses the heater core, remove all the screws that surround this box, there will be one screw on the top that will be very difficult to get at, this is why you have removed the top of the dash so you can get at it with two hands,if you need to see this screw get outside of the car and look down at the dash from the passenger side and then your going to have to depend on feeling with your hands.
  4. At this point you should have the plastic box off and now your looking directly at the heater core, the core is held in place by a steel clamp fastened with screws, remove these screws, and remove the clamp.
  5. Now it's time to remove the heater core , get some plastic sheeting and lay it around the passenger foot well because there going to be some water in the core yet, pull it out gently, you might have to wiggle and gently pull, take your time, it should come out fairly easy.
  6. Once you have the old core out, it's time to install the new one, I can't tell you how important it is at this point to be very patient when installing the new core, you may have to slightly bend the new core tubes to get them through the firewall, you may end up taking it out a couple of times BE CAREFULL!!!!!!
  7. Once you have sucessfully got the core in place, install the core clamp, then re-assemble

Posted on Mar 03, 2011

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