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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1645 (Engine Control System & Fuel System - 4.8L, 5.3L, 6.0L, 6.2L - DTC P0300 To DTC P1175) >> DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or P0333 (Without Heavy Duty L96) >> Circuit/System Testing >> P0325, P0326, P0327, P0328, P0330, P0332, P0333

P0325, P0326, P0327, P0328, P0330, P0332, P0333

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the affected KS.
  2. Ignition OFF. Connect a DMM to both KS signal circuits, terminals A and B, at the affected KS. Set the DMM to the 400 mV AC scale, select the Hz mode. Let the reading stabilize at 0 Hz.
    3. NOTE: DO NOT tap on plastic engine components.
  3. Tap on the engine block with a non-metallic object near the affected KS and observe the DMM for a fluctuating frequency.
    • If the DMM does not display a fluctuating frequency while tapping on the engine block then replace the affected KS.
  4. Verify the affected KS is properly tightened, refer to Fastener Tightening Specifications .
  5. Ignition OFF, with appropriate length jumper wires, connect the KS1 harness to the KS2 sensor and the KS2 harness to the KS1 sensor.
  6. Monitor the DTCs using a scan tool. Operate the vehicle within the conditions for running the DTC. Verify the fault does not follow the sensor in question.
    • If the fault follows the sensor in question, replace the appropriate KS.
  7. Ignition OFF, remove the jumper wires from the previous step.
  8. Measure for 2-3 volts between each of the following circuits and ground on the ECM side of the harness connector:
    • The KS signal circuit, terminal A
    • The KS signal circuit, terminal B
    • If less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the ECM.
    • If greater than the specified range, test the circuits for a short to voltage. If the circuits test normal, replace the ECM.
  9. Test for intermittent or poor connections at the ECM, KS, and in-line connectors where present.
  10. If all circuits test normal, replace the ECM.
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