Rear heat and Air not working

[ppgbodyman]

I am new here. I did search the forums but didnt find what I was looking for...Anyway I have a 1998 Tahoe. The rear heat and air doesn't work. You can move the switches and the blower does blow but its not heated or cooled air. My question...Does a tahoe have a heater core in the hear somewhere? I had a Serberban and it did but I can't find any heater hoses running toward the rear. It does however seem to have A/C hoses running down into th e frame from the engine compartment. If the Tahoe does have a rear AC Condensor and heater core where are they located? Oh and when I say rear heat I mean just behind the driver in the ceiling. Mine is a 4 door with no third row seat. Thanks for any help!