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Originally Posted by Titan2006
I know this is a chev forum but I've posted this in the Buick aswell.
My question is my when I turn the heat or air conditioner on the fan only works on 4 and 5 position. It will not work at all in 1, 2, or 3rd position. I have a 2003 Rendezvous.
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Welcome to the forum!
The good news is: A blower is a blower -- they are all about the same.
The first thing I would suspect is the "Blower Motor Resistor Pack." It controls all the speeds below HIGH. Since your lower speeds are out, I would suspect it first. Should be mounted near your blower motor.
After the resistor pack, I would suspect the controls, or the connections to it.
Take Care,