You will need to replace the heater core.
Typically that leak is caused by a leak in the heating system. The heater core is under the dashboard, just above the passenger side.
Most likely a leak in the heater core, should be on the passenger side under the dash.
No vehicle actually burns antifreeze. If the antifreeze level in your Saturn seems to be going down, it's because of a leak.Possible antifreeze leak locations are:Coolant hoses.Radiator cap.Water pump.Heater core.Head gasket.Cracked head or block.Find out where the leak is occurring and repair it.
You have to determine the source of the leak then decide on how to fix it.
hater core is bad
water pump
Heater core leaking?
it has a bad rear heater core
This probably means that your heater core has sprung a leak ; you will probably find the passenger side damp form the leak itself - check with your mechanic .
An antifreeze leak.An antifreeze leak.
You will need to replasce the heater core.
A leak.