I have a 2005 trailblazer ext, my blower motor resistor is going bad. Does any one know where i can buy one? I called around some of the part store's and they said they don't carry them yet for my year. Called a chevy parts dealer and they want $170 dollars, does that sound right? I pulled the part down from under my dash never unplugged it, but notice rust on it. I cleaned up the rust with a piece of sand paper, turned it on and it worked but 5 did not, I could live with out 5 for a while, but laiter the next day it went out again, so I assume I need to replace it does that sound right?