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99 gmc 5.3 engine is there a fused circuit for the knock sensor?

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September 15, 2008 7:51PM

the knock sensor is not a fused circuit, it consists of a wire from the sensor to the pcm or ecm, when the motor knocks(misfires), the sensor( a piezo electric device, like the ignitor for a grill)outputs voltage into the pcm, its a closed circuit and not much to it.