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not sure the exact location of the wire in the harness, but i can tell you that the speed sensor has 2 wire leads, that run directly to the PCM. they are in ports 20 and 21 on the PCM wire connector. Pin 20 is for speed sensor low signal and is Light green and black in color. Pin 21 is for speed sensor high signal and is purple and white in color

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โˆ™ 2007-09-17 16:24:58
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Q: Which wire is for the speed sensor behind the radio in a 2004 Cadillac Escalade GMC?
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