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Q:

car is leaking coolant on 1995 Chevrolet Corsica

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
weither the car is on or off the coolant goes into the expansion tank and back out the a/c drain hose
(1) Answer
If the coolant is coming out of the A/C evaporator drain you need to have the heater core replaced as it is leaking. In most cars the heater core and the evaporator share the same housing.