2001 Chevrolet Silverado 1500 - Heating issue

chevrolet

#1

heater blowing cold air ,climate control working ,actuator door working,water going into core hot coming out cold


#2

Coolant constantly flows through your heater core, whether you want heat or not

So you’re talking about the blend door actuator . . . ?

So you’re saying one heater hose is hot, while the other is cold . . . ?

Assuming the engine had reached proper operating temperature when you made that statement . . . your heater core is at least partially plugged, maybe completely