K 2500 Yukon 4WD V8-6.0L VIN U (2000)
The scan tool has several parameters for diagnosing the KS circuit:
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Knock retard indicates the amount of spark the PCM is removing from the Ignition Control (IC) spark advance in response to the signal from the
knock sensors.
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Spark indicates the amount of spark advance being commanded by the PCM on the IC circuit.
DTC P0325 indicates an internal PCM malfunction related to the KS system. DTCs P0327 and P0332 indicates that a knock sensor or knock sensor
circuit is malfunctioning. If these DTCs are set, refer to the applicable DTC table.
