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GMC
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2003
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Sierra 2500 HD, 2D Pickup, 8.1 G, RWD, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self Diagnostics - 8.1L
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Diagnostic Tests
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DTC P0325: Knock Sensor Module Circuit
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Conditions For Setting DTC
Conditions For Setting DTC
A malfunction with the KS system or the circuits within the PCM are faulty for 15 seconds or more.