03 TB LT Heater Fan Speeds

[johnblahblah]

Hi, I was just wondering if any of you knew how to fix, or what the problem was with my heater fan.
It will only work on speeds 4 and 5, 1, 2 and 3 do not work. I tried all settings but nothing will get them to work. they were fine 3 hours ago, but when I started the truck a few minutes ago to run to the store, notta. I will try later to see if it is an intermittent problem.
I haven't heard any weird noises from it at all, it just stopped working.

I've read about resistors and things, but is it something a novice could replace, or is it difficult.


Thanks,

John Griffin

[maxwedge]

Blower relay/resistor is bad, very common, mounted on the heater case under the r/s dash to the left of the glove box, $28.00 from GM

[trailsharky]

funny that yours suddenly only works on 4 and 5
my 2002 did the same thing over a month ago
I haven't bothered to get it fixed yet