Question about 2007 Chevrolet Avalanche LTZ

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I have a 2007 chevy avalanche. the HVAC blower went out and was replaced 8 weeks ago... I was told that it was one or two components - the fan motor or the controller and possibly both... I was told both and it cost me $400. It went out again yesterday I thought it would be a warranty repair and I am being told that there is another controller that needs to be replaced for $200. Please advise me on what the components are that can affect the HVAC fan in the cab how many potential replacement parts and possbile costs.

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I need to have a little more information to give a well informed answer. I have a 2007 LTZ (dual auto control), and have been experiencing blower problems. Mine seemed to work when it wanted to. At first, I could slap the cover under the passenger side, and it would come on. That trick stopped working, so did some research, and found out that the resistor failure is a common problem. I found a resistor online for $30+. I put it in, and it did not solve the problem. Took the blower out (pretty easy - just pry the plastic locking tab down, and twist counter clockwise - the blower will dop into you hand). I looked at the wire connection on the blower, and noticed the plastic connector was distorted and half melted. I called the local dealer and found out that the connector cost $120.00. I looked online and found an ACDELCO connector for $25.79 (Part # PT731). Put it on, and WAHLA fixed. I hope this helps.

Posted on Jan 25, 2011

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Fig. Typical behind-the-instrument panel view of HVAC related components. Depending on the HVAC option, not all components are used on all vehicles (click for zoom)

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Fig. Typical HVAC operation schematic

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Fig. Blower motor and fan assembly removal

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  5. b8492c4.gif

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