Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
If you had not already replaced the resistor, that would be the first thing I would have checked. If you can access it without too much trouble, you can test right at the resistor and see if you are getting voltage to all of the terminals on it when you move the fans speed control switch. If you do not, this would be a further indication of a bad blower switch. As far as the fuses go, there is no in line fuse for the blower motor. The only fuses that would affect it would be the 20 amp fuse that says ign. gages or the 25 amp that says heater ac, both in the fuse block. I will enclose a copy of the wiring diagram just in case. Good luck with it and thanks.