1-2 fan position not working.
 

Hey guys. I got one for you. my fan dosent work on the one or two position, but it works fine on three and above. do you think it`s the switch or could it be something else.

Same Problem
 

Had same problem on my 99 silverado. I had to buy a part that was located near the inside filter kit at the passenger floor board. I changed that and now mine works on all settings. Part came from auto zone an was about a 20 minute fix.

It's called a blower resistor - since we usually use 1 & 2 the most they will burn out first.

thank you i`ll check it out.

Not to hijack it, but is it the same part on my neighbors 2004 Tahoe? he lost 2, 3, and 4

Could be. The ones I have seen are wire wound resistors and each position (fan speed) has a resistor or a combination of two. As was said earlier, the fan speeds that are used the most are the first ones to burn out. If a combination of resistors are used, one resistor could take out two speeds.

same thing happened to my truck

im just too lazy too fix it

Don't the 2004's have the electronic display with a bunch of lines instead of 1,2,3,4 like the older trucks? I know my wife's 2003 Tahoe has all the lines so there are a lot more than just 4 speeds.

Well I fixed it. I went to autozone and twenty-five dollars later it was fixed. The blower motor resistor controls all five speeds, But only some of it quits. about 15 min. to do the repair.

Hi Guys-My AC blower started working only in HI. Have a 98 Silverado and replaced the RESISTOR inside the blower motor under the dash. It worked a few minutes, then quit. Any suggestions? Clarence