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How do i change out the heater core on 1995 1500 cheyenna truck?. do i need to remove the dash board?

I wont to change out the heater core

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  • Expert
  • 318 Answers

No short cuts with this . however if you are good you can undo enough to get unit out from passenger side leaving the drivers side of dash up close to the sctreen and get pass side away far enough to get unit out. have fun

Posted on Dec 03, 2012

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  • 2 Answers

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Posted on Jan 02, 2017

lancer721
  • 229 Answers

SOURCE: how to change heater core 2001 dodge 2500

You can probably avoid removing the dash to replace this get under and start dissasembling to find out for sure you should avoid taking that dash out if at all possible they are a real pain - good luck

Posted on Dec 31, 2008

dnewcombe1
  • 1564 Answers

SOURCE: Replacing heater core in 2000 GMC sonoma. Dash is

If the dash is removed you've saved about 9 10ths of the job endurance. Look around, what you believe to be, the perimeter of the heater box. I cannot, and no one else can, tell you exactly where the bolts and nuts that mount the heater box are. Therefore you must viually sixe the box and check outide in the engine compartment and inside under the dash for the mounting bolts.You'll want to start by removing the heater hoses. Then starting at the passenger side engine compartment look for a group of 10mm or 7/16ths nuts retaining the housing and remove them. Do the same inside. The housing is usually held together with screws or clips, it changes year to year. Keep a log or pix of the wires and cables and hoses(vacuum) that are connected to the housing for reassembly. You'll need to "roll" the box out from under the dash depending on how much of the dash has been removed. The core is easy to spot for is has two hoses sticking out, and, is encircled with clips or screws . Also make sure you remove the bracket around the two entry hoses if it has one. Thank you, Dana

Posted on Oct 04, 2009

  • 98 Answers

SOURCE: How to remove the heater core from a VW GolfMK3

there are alot of hidden screws holding the dash in. there are some up across the top of the dash by the windshield and defrost vents. also when you open the doors there are some in there. it is quit a difficult job I really dont recomend doing it yourself but if your not afraid to try and feel confident enough to tackle it good luck. it would be best to have an experienced mechanic do the job but it will cost over three hundred for labor. if you do it yourself go to a parts store that sells haynes repair manuals they cost about twelve dollars and are pretty helpfull.

Posted on Oct 31, 2009

Testimonial: "Thanks for the advice, I will find a manual and if gives some form of help I will do it myself. If not I will pay for it to be done. Thanks."

c17hydro
  • 2984 Answers

SOURCE: heater core

No, you don't have to pull the whole dash board but you have to pull a few panels....here is the steps on how to get to it and remove and replace it:

  1. Disconnect the negative battery cable.
  2. Drain the cooling system and disconnect the heater hoses from the heater core tubes. Plug the hoses and the heater core tubes to prevent coolant leakage.

CAUTION NEVER open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, 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 quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.


  1. Remove the 3 nuts located below the windshield wiper motor attaching the left end of the plenum to the dash panel. Remove the 1 nut retaining the upper left corner of the evaporator case to the dash panel.

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Plenum removal—1990-98 vehicles

  1. Disconnect the vacuum supply hose(s) from the vacuum source. Push the grommet and vacuum supply hose(s) into the passenger compartment.
  2. Remove the right and left lower instrument panel insulators.
  1. On 1989 vehicles:
  2. Remove the 3 glove compartment hinge screws, disconnect the check arms and remove the glove compartment.
  3. Loosen the right door sill plate and remove the right side cowl trim panel.
  4. Remove the bolt attaching the lower right end of the instrument panel to the side cowl.
  5. Remove the instrument panel pad as follows:
    • Remove the 2 screws attaching the pad to the instrument panel at each defroster opening. Be careful not to drop the screws into the defroster openings.
    • Remove the one screw attaching each outboard end of the pad to the instrument panel.
    • On Crown Victoria, remove one pad attaching screw near the upper right corner of the glove compartment door.
    • Remove the 5 screws attaching the lower edge of the pad to the instrument panel. Pull the instrument panel pad rearward and remove it from the vehicle.
  6. On 1990-98 vehicles:
  7. Remove all instrument panel mounting screws and pull the instrument panel back as far as it will go without disconnecting any wiring harnesses.
  8. Make sure the nuts attaching the instrument panel braces to the dash panel are removed.
  9. Loosen the right door sill plate and remove the right side cowl trim panel.
  10. If equipped with manual air conditioning, disengage the temperature control cable housing from the bracket on top of the plenum. Disconnect the cable from the temperature blend door crank arm.
  11. If equipped with Automatic Temperature Control (ATC), proceed as follows:
  12. On 1989 vehicles, disconnect the temperature control cable from the ATC sensor.
  13. Detach the vacuum harness line connector from the ATC sensor harness and detach the electrical connector from the ATC servo connector.
  14. On 1990-98 vehicles, remove the cross body brace and disconnect the wiring harness from the temperature blend door actuator. Detach the ATC sensor tube from the evaporator case connector.
  15. Detach the vacuum jumper harness at the multiple vacuum connector near the floor air distribution duct.
  16. Disconnect the white vacuum hose from the outside-recirculating door vacuum motor.

572e87e.gif
Floor air distribution duct removal—1990-98 vehicles
  1. Remove the 2 hush panels.
  2. Remove 1 plastic push fastener retaining the floor air distribution duct to the left end of the plenum.
  3. Remove the left screw and loosen the right screw on the rear face of the plenum and remove the floor air distribution duct.
  4. Remove the 2 nuts from the 2 studs along the lower flange of the plenum.

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Heater core removal—1990-98 vehicles

  1. Carefully move the plenum rearward to allow the heater core tubes and the stud at the top of the plenum to clear the holes in the dash panel. Remove the plenum from the vehicle by rotating the top of the plenum forward, down and out from under the instrument panel. Carefully pull the lower edge of the instrument panel rearward, as necessary, while rolling the plenum from behind the instrument panel.
  2. On 1989 vehicles with ATC, remove the ATC servo from the plenum.
  3. Remove the 4 retaining screws from the heater core cover and remove the cover from the plenum assembly.
  4. Pull the heater core and seal assembly from the plenum assembly.
To install:
  1. Carefully install the heater core and seal assembly into the plenum assembly. Visually check to ensure that the core seal is properly positioned. Position the heater core cover and install the 4 retaining screws.
  2. On 1989 vehicles with ATC, install the ATC servo on the plenum.
  3. Route the vacuum supply hose through the dash panel and seat the grommet in the opening.
  4. Position the plenum under the instrument panel with the register duct opening up and the heater core tubes down. Rotate the plenum up behind the instrument panel and position the plenum to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the evaporator case.
  5. Install the 3 nuts on the studs along the lower flange and one on the upper flange of the plenum. Install the 3 nuts below the windshield wiper motor to attach the left end of the plenum to the dash panel and the one nut to retain the upper left corner of the evaporator case to the dash panel.
  6. Position the floor air distribution duct on the plenum. Install the 2 screws and plastic push fastener. If removed, position the panel door vacuum motor to the mounting bracket and install the 2 attaching screws.
  7. Connect the white vacuum hose to the outside-recirculating door vacuum motor. Attach the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the floor air distribution duct. Install the floor duct.
  8. If equipped with manual air conditioning, connect the temperature control cable housing to the bracket on top of the plenum and connect the temperature control cable to the temperature blend door crank arm. Adjust the temperature cable.
  9. If equipped with ATC, proceed as follows:
    1. On 1989 vehicles, connect the temperature control cable to the ATC sensor and adjust the cable. Route and attach the vacuum harness connector to the ATC sensor and attach the electrical connector to the ATC servo connector. Do not block the sensor aspirator exhaust port with the excess vacuum harness. Install the ATC sensor tube between the sensor and the evaporator connector.
    2. On 1990-98 vehicles, attach the ATC sensor tube to the evaporator case connector. Install the cross body brace and connect the wiring harness to the blend door actuator.
  10. Install the bolt to attach the lower right end of the instrument panel to the side cowl. Install the right side cowl trim panel and tighten the right door sill plate attaching screws.
  11. On 1989 vehicles, install the instrument panel pad and the glove compartment door. On 1990-98 vehicles, push the instrument panel back into position and install all instrument panel mounting screws. Install the right and left lower instrument panel insulators.
  12. Connect the vacuum supply hose(s) to the vacuum source.
  13. Install the right and left lower instrument panel insulators and install the 2 hush panels.
  14. Unplug the heater core tubes and the heater hoses and connect the heater hoses to the heater core tubes. Fill the cooling system.
  15. Connect the negative battery cable and check the system for proper operation.

Posted on Feb 15, 2010

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PLEASE DON'T FORGET TO RATE!!!

Removal & Installation
  1. Disconnect the battery negative cable.
  2. Remove the instrument panel from the vehicle.
  3. If equipped with air conditioning, recover the refrigerant.
  4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
  5. Ram: remove the accumulator.
  6. Dakota, Durango: disconnect the accumulator inlet tube.
  7. Drain the cooling system.
  8. Disconnect the heater hoses from the heater core tubes.
  9. Ram: remove the powertrain control module from the dash panel. Disconnecting wiring is not necessary.
  10. Remove the four nuts from the heater–A/C mounting studs on the engine compartment side of the dash panel.
  11. Remove the nut(s) that secure(s) the heater–A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
  12. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
  13. Remove the housing from the vehicle.
  14. Lift the heater core out of the housing.
  15. Installation is the reverse of removal
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