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    2002 sierra electric fan upgrade?

    Im trying to complete a Fan update on a 2002 GMC SierraTMC and Im having issues.TMC I had my pcm flashed byTMC a vendor in ColumbiaTMC KY. They have been less than helpful in responding or technical support . I added electric fans factory and harness from 06, and a ac transducer ( in place of...
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