I think its called the blower fan, but I'm not too sure. The problem is that the fan in my truck does not work. Setting 0-5 are the same thing, but the different settings of where the air blows works. Temperature setting works, just he fan doesn't. I looked at the fuses and couldnt seem to find one. If there is a fuse, what should it be labeled under?

http://www.dieselplace.com/forum/showthread.php?t=326121&highlight=resistor

The resistor module has failed. As for fuses, there is a 40 under hood for high only, and a 30 indash for the bottom 4 speeds, plus the high speed relay.