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Possibly a blower motor resistor that reduces the current to motor on the lower speeds? At least that is the way manufacurers used to do it.



For sure, this is what they look like for chevy.

They are located in the heater box somewhere.

Don't fret about replacing the blower motor, it needed it anyway because more than likely the old one was starting to draw too much amps and burned out the speed resister and the new one(resister) would have got cooked by the old blower motor sooner than later.

And then you would have thought you got a bad blower resister.