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PCM controlled A/C 2003 Silverado, is it possible?

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Old 04-22-2009, 05:31 PM
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Default PCM controlled A/C 2003 Silverado, is it possible?
I'm not sure this is even going to be possible because there is no A/C request wires in the PCM harness. It looks like I would have to use the original switch on the dash for it to work, because it sends a signal through the serial data line to the PCM. Anybody found a way around this?
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Old 04-23-2009, 09:11 PM
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Nobody's done this?
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Old 04-24-2009, 01:12 PM
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maybe a different OS you can flash that does have an AC request pin?
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Old 04-24-2009, 04:49 PM
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Yeah, I'm thinking about changing everything to 2002, but haven't had the wiring diagrams side by side to see how much repinning it would take.
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