How do I replace the heater core in my 2008 chevy aveo

Are you talking about blower motor, speed control? I didn't realize the temp control had number settings? I'm just trying to make sure I understand?

There are 2 knobs generally to control air; 1 for hot/cold & the other for strength of air pressure which mine just happens to be 1-4. It blows out really strong on 4/highest setting, not at all on 2 & 3 and very low/can barely feel it on 1. Idk if maybe it is clogged or something else is going on. If it is the resistor where do I find that? I haven't had this car that long & am trying to fix it's issues. I didn't have a choice on getting this car as my last cars' engine seized up & the car lot said this car was the only one they could get us in.

need to replace heater hose

is 2 hose connectec to fire wall and where is connecte