Changing the heater core requires complete removal of the dash panel and plenum box. To do this you have to remove the steering wheel, steering column, evacuate and recharge the refrigerant system and drain the radiator. I would only consider changing the heater core if it is physically leaking into the passenger compartment. If the problem is heat transfer to the HVAC system only, the problem is more likely with the blend doors. Check heatertreater.net for pictures and diagnostic information.
No, the entire dash has to be removed.
I wouldn't replace it, just fix it. Check heatertreater.net for information on how.
A seat from a 1999-2004 Grand Cherokee is what fits in a 1999-2004 Grand Cherokee.
I have a 1999 -- same problem, and I've heard that it's a common one.
where is the ac drain on 1999 jeep grand cherokee limited
You should look here: http://www.links4jeeps.com/writeups/clockspring/
No, they will not interchange.
I get 15 to 17 miles per gallon with my 1999 Jeep Grand Cherokee Lorado.
No.
No. They are not interchangeable.
You need to replace the thermostat and flush the system of crud.
Take out the 6mm bolt and pull outwards on the headlamp assembly.