I've read some other forums and see conflicting answers regarding blower motor problems. I have a 98 c1500 1/2 ton 2WD 5.7L reg cab. I've had it for a year and a half now and the blower fan has always worked on all but 1 setting. It's a 5 position switch (off/low/med/med-hi/high). It was always dead on the medium setting until today. Yesterday, all the speeds quit working altogether(not blowing any air at all). I pulled and cleaned the 25amp inside fuse and 50amp fuse under the hood with no luck. Today every single one works. ?????? I've been reading and been told it's either the switch itself or the resistor going bad or the fan itself.I have noticed lately that the fan has a low pitch growl on the low setting but went away on higher settings. Any suggestions?