I am trying to figure out what my next step is. Have a 1999 grand prix GT. the fan completely quit working so I have replaced the blower motor and blower resistor. now it wont work on level five but works perfectly on 1-4. I would think that the next step is the blower switch but i am not finding any info on if my car really has a blower switch and where it located. I am new at working on the mechanics end but REALLY want to learn.