Pulled every thing apart to get the heater core out and I can't figure out how to get it out. What am I doing wrong??????

You will need to get a service manual as it is too complicated a job to advise here.

do the heater copper water pipes go through the firewall of the engine bay ?
or are they connected via rubber hoses through the fire wall.
If so it could be a rubber hose.
if the core is leaking you have to pull the whole dash apart to get at it. It is a big job to do.
http://workshop-manuals.com/daihatsu/charade/l4-1295cc_1.3l/engine_cooling_and_exhaust/cooling_system/heater_core/component_information/service_and_repair/
I have not found instructions on how to remove the instrument panel
you may need to purchase service manual or figure it out by trial and error . Watch out if airbags involved disconnect any air bags first .

Well if your 1500 is any thing like my 03 2500 hemi 4+4 then you need about six hours of free time. The heater core is behind the passenger side dash area you have to first begin to take the front dash all the way apart and I mean all instrument cluster drop steering wheel from middle support bracket after that you will disconnect the ac lines into firewall this is not easy task but can be done with specialty ac tool then in both sides passenger four bolts on each side take those the whole dash can then be pulled back far enough to take two hoses of heater core and in engine compartment four bolts hold it in then follow steps to install

Sounds like you have two problems. One would be a leak of antifreeze into the A/C Plenum or duct assembly and or that and a stuck motor that's not switching from hot to cold. If this is the case you have a lot of work to do. First check to see in the engine coolant is low if it is You would see a oily spot on concrete where you park and would be red yellow or orange in color, if you have antifreeze leaking it is most likely the heater core But could be several things like a bad clamp or a bad hose. You will have to pull apart to look and figure out what is wrong. If you want more information on how to fix this let me know. If the A/C is still not working there could be several things wrong, AC low on freon or bad thermostat or blown head gasket but would need more information to know for sure. Also could be switching motor on the inside of the engine compartment. Thanks for using fix-ya.

follow your heater core lines to find the position of the heater core some where near there will be a heat door the heat door is run by a small square thing about the size of a deck of cards it comes off and it also comes apart itself if youre carefull because if you got the wrong one /there may be up to 3 / look for shreded teeth inside the square thing is usually black and about the size of a deck of cards

make sure water line is going to the heater core inside car will be on passenger side sometime when heater core goes out people will by-pass the heater core and plug line going into car

The heater core mission. As for discharging the A/C system, I would like to state for the record that it is not necessary to discharge the A/C system to exchange the Heater core on an 98 Expedition/Navigator, just drain the coolant, remove the dash, open up the box that house the A/C system core and the Heater core, remove and inspect the blend door for cracks where it attaches to the actuator, check the blend door actuator then cut the metal lines on the top of the heater core off for easy removal, from the engine compartment pull the heater core lines through the firewall for easy disconnect and that is it, you are now ready to start the re-install process. One thing I recommend is while you have everything apart change the blend door actuator, especially if you see traces of where the coolant was leaking in the box. 9 out of 10 times the coolant leaked out through the actuator and it is just a matter of time before the electrical circuitry in the actuator quits working leaving you with no heat or only heat. Well moving on to other issues now that heat works and spring is near. Good luck and install in reverse, take pictures with your cell phone to use as reverence on things you took apart and Merry Christmas.

the best I can recommend at this time is go to auto zone and ask if they can provide a diagram print out for you I have a Haynes book and it states: to pull off the cover of the heater core/evaporator core housing it has small screws and then pull the blend door assembly out to expose the heater core

2002 diamante heater core sits in center of the dashboard just over the on board computer for the car. To access it you need to take out the console between the seats and the entire dashboard to get to it. The only thing wrong with the heater core is the leaking gaskets (about $10 in parts). Mitsubishi knows about the problem and when the dash is taken apart you will see a plastic sheet over the onboard computer to somewhat protect it from the leaking heater core gaskets. So the expense in the repair is in the labor to get it all apart and back together again. The dealers seem to replace entire heater core when they fix this problem. I did just the gaskets and that solved the problem. I have read others who did it themselves only replaced the gaskets and that solved it for them as well. Maybe the dealers think you will feel better replacing a larger part for so much labor.

We found out that you do not have to pull the dash out to replace the heater core. Thanks for you follow up