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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 985 (Instrument Panel System Displays & Gages) >> Diagnostic Information and Procedures >> DTC P0462 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector at the fuel level sensor.
  2. Ignition ON, verify that the scan tool Fuel Tank Level Remaining parameter display is less than 4 percent.
    • If greater than the specified range, test the signal circuit terminal C for a short to ground. If the circuit tests normal, replace the ECM.
  3. If all circuits test normal, test or replace the fuel level sensor.
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