shaddow said:
Here's a bump,do it.Not that difficult a repair at all.
Under the hood remove the 2 heater hoses from the heater core ends.
Then inside the car,Remove the 2 covers under both sides of the dash.Then there are about 11 small screws that hold the heater core cover plate to the A/C-heater plenum.Make sure you remove them all as there are some that are hidden pretty good.Once thats out remove the 2 straps (4 screws)that hold the heater core in and then just re-assemble.Chances are good that you'll find then heater core tubes are either cracked or completely broken off,very common failure.
Hopefully its not a console car as that makes it a little more difficult but still do-able.