A smaller version of GM's rebirth of the Hummer.

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Under the dash AC Housing Unit

Under the dash board there is a housing unit for the air conditioner. Where is it located exactly and how do I get to it?

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I found it. It's the Blower Motor Reristor and wiring harness which had gone bad. They are located on the passenger side just under the dash. The wires had melted.

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Since I am not quite sure what part you are looking for, here is the HVAC part of the service manual for your H3. See if this will help. Good Luck

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