If the heater hoses are hot and circulating hot water through the heater core, the problem is almost always with the blend doors. This is a very common failure on the GC. Check heatertreater.net for diagnostic processes and pictures.
The dealer will have to remove the dash and plenum box, about 8hrs labor. Depending on location and dealer, this is very expensive. The web site above will help you do it yourself at a fraction of what a dealer will charge.
Yes
no
No. one heater core, two airflow control doors. Called blend doors, very prone to breaking.
No.
Yes, they are both 5 on 5.
No. They are not interchangeable.
Your 2007 Jeep Grand Cherokee 16 inch aluminum wheels will fit on to the 2000 Jeep Cherokee Sport. Any wheel larger than 16 inches will not yet on to the 2000 Cherokee.
Probably engine coolant. The heater core is leaking coolant.
No
No.
The fog lamps are activated on a 2000 Grand Cherokee via the headlight switch. Pull the END of the lever OUT.
where is the heater core at