Blower Switch?
 

With AC or vent heat ect on. I turn the blower on the #1 position, and its nothing, move it to to #2 and its nothing, you dont start to feel air blowing out of the vent till you hit #3. Anyone know what causes this? What can I replace to fix this?

Heard about this before and seen some suggestions about a resistor gone bad inside the HVAC unit.

Sounds like a blower resistor gone bad. What year truck is it?

1999
 

1999 Silverad 4WD Ext Cab.

mine does the same thing!!! so it's prob the resistor??? if so im going to the part store tom and getting it!

I've had this problem and it was the blower resistor unit. Mine (different make) was a unit that had wire wound resistors for each blower speed. They get pretty hot and failure was fairly common. Mine was mounted from the inside underneath the glove box. All you could see was the bottom of the unit and the wiring plug. Like I said, mine was a different vehicle and yours probably will be different but I'll bet that is where the problem is. Good luck.

went and bought the resistor today, the first one i got it was already broke then went back and got another one, works perfect!!!! thanks for yalls help!

Yes thanks guys! Went to autozone got it for around $25. Put it in in about 30 minutes. Now all 5 settings work!

thats great !! Let us know if you need anymore help