Leaking heater core

Its located behind the dash and the repair time is 5.2 hours and doesn't include AC recharge if you have AC, Its a big job that probably should be done by a shop

i have done this job & it would be hard to do without some of the expensive tools i own. there are many small plastic clips & hidden screws that are difficult to undo or even worse you could break something. but do check to see if your heater hoses may be leaking were they attach to the heater core outlets.