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It leaks coolant.
You know the heater core is bad when your truck leaks antifreeze onto the floor of the passenger side.
Check both the heater core as well as the heater hoses for leaks...........
Heater box drain It is just below the heater hose conections, If the heater core leaks it drains the coolant outside to keep the carpet dry.
its most likely the heater core that's leaking
Tie the 2 water lines that run to heater core together
heater core leaks
smell of antifreeze and no visable leaks usually indicates that the heater core needs replacing
Bad heater core?
replace heater core under dash passenger side
i believe your heater core has died
A heater hose or heater core is in need of repair. stonemkr reverse painting on glass