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International Automotive Technicians Network
Re: 01 gmc jimmy speedometer
Posted to Technical Discussion Forum on 6/12/2007

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The VSS is actually a PM generator and as such sends a pulsing AC voltage to the PCM terminating at pins 20 and 21 in the C2 red connector. The AC voltage can vary from .5 to 100 volts depending on tr... Login to read more.