Replace heater motor resistor.
There is a fuse under the hood for the blower motor.
Bad bearing in blower motor?
It should be in the heater blower motor case which is located under the glovebox.
NO
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It is over the passenger side strut tower, accessible from under the hood.
No.
NoNo
There are similar, but not the same.
The resistor block or blower motor resistor is used to control the speed of the blower motor. That is how you get the lower speeds on your air conditioning or heater. The higher the resistance the lower the speed of the motor.
No. The bolt pattern is different.
Usually if the resistor is bad the heater will only run on full blast.