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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 865 (Instrument Panel System Displays And Gauges) >> Diagnostic Information & Procedures >> DTC P0462 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  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 is less than 4 percent.
    • If greater than 4 percent, test the signal circuit 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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