The heater/AC fan in my son's car (2000 corvette) only works on high. Do any of you GM tech's out there know what might be wrong? On an older car I would say the high/low blower switch is bad but I don't know if it's the same on this car.
Does anybody know if it's the switch or a resistor or???? and the location of the switch or resistor?

Thanks for any help. My son is in his last year of Pharmacy school and I'm trying to fix this to save him some money.

9 times out of ten that is a resistor. Have seen it be the switch once because the contacts melted and got all screwed up.

Thanks!

Do you know where the resistor is located?

Under right side of the dash next to the blower motor. Check the connections and make sure they aren’t melted.