heater fan relay

[soatway]

I have a 94 k2500 gmc suburban with the 454 and a/c. I am having a problem with my heater fan motor. The motor works fine but only on low or high. There are two medium settings where nothing happens anymore. As i go though the differnt positions i can hear a soft clicking coming from what appears to be four relays sitting on top of the heater ac unit under the dash. I have the glove box out. How do i isolate the relay? Are they all the same part? Can anyone help me? I have read the available posts and feel like I am close to a solution.

[collinsperformance]

i bet it is the resistor pack or switch that is the issue. the resistors control what speed the motro goes into...........mike

[dwill3015]

Check THIS THREAD (http://www.gmtruckclub.com/forum/showthread.php?t=15075)out and it should give you some good info.

[unplugged]

Check THIS THREAD (http://www.gmtruckclub.com/forum/showthread.php?t=15075)out and it should give you some good info.

Bravo. Not the most complete body of data, but very, very good. Thanks!:rofl:

[soatway]

The resistor pack sounds like what was calling the relays. I work at a gm store so will check it out . Thanks/