Well the blower motor resistor is bad. Thats the reason for only 1 fan speed.
#7 in this parts diagram.
Part Detail
As for it making noise, pull the motor out. Could be there is crap (leaves and stuff) in it causing the noise. Or it could be a bad blades on the fan or the motor is going bad.
BTW, there is a 4th gen section this should have been posted in.
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