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  1. Engine Tunes/Mods
    I'm trying to locate a pinout of the blue PCM for a 2007 Trailblazer LT. I'm installing a remote starter that says I need to connect to the tach wire. Which says it's the white wire on pin #49 in the blue connector. I haven't taken the PCM off to see if there is only one white wire, but I...
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