[jfnz24]

As stated in the subject, I believe I have a problem with the blower fan as it only works on the highest speed (first only one speed stopped working, now 3 of the 4 don't work). I can get a new blower motor (if this does sound like what it is causing the problem), however, 1) I don't know for sure this is the problem and 2), is this something I can do myself?

Does this sound like a typical resistor problem that would be solved by a new fan? Also, does somebody (heres talking to you GMCSonoma) have a diagram as to what needs to be done? Any help/suggestions would be appreciated.