Just searched for the problem. Several postings on it. Probably #35 the blower fuse in the underhood fuse block. The blower motor gets power from that fuse only in the high "5" position.
Thanks for the timely response, This would make sense, due to my amp blowing 2 fuses in the rear fuse box 3 days ago lol (fixed that problem already tho)
more likley your blower resistor. mines been dead for over a year. resistor harness likely all melted too. Chevy wanted to charge me 300 to fix. 30 dollars of parts. No thanks- pretty easy fix and I can really live without #5.
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