how much should a heater core replacement cost? on 2002 Chevrolet S10

steam coming out of vents after the radiator was replaced

Asked by for the 2002 Chevrolet S10
My labor guide says it is about a 9 hour job if you have air conditioning to replace the heater core parts would be another $175 or so.
2 more answers
Around $800 which I did myself and wish Ive paid the $800. It took me 6hrs to take out the Heater core with some help from youtube. Now heat wont blow from the front vents ( motor vale or temp control switch probably went bad )
the heater cole