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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1097 (Instrument Panel System Displays & Gages) >> Diagnostic Information and Procedures >> DTC P0462 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the primary fuel level sensor.
  2. Ignition ON, verify that the scan tool Fuel Tank Level Remaining parameter is 4 percent or less.
    • If greater than the specified range, test the primary signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the ECM.
  3. If all circuits test normal, perform the fuel level sensor component test before replacing the primary fuel level sensor.
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