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The low fuel indicator illuminates. The ECM records the operating conditions at the time that the diagnostic test fails. The Conditions for Clearing the DTC The DTC becomes history when the conditions for setting the DTC are no longer present. The history DTC clears after 40 malfunction-free warm-up cycles. Diagnostic Aids A defective fuel level sensor most likely will not set DTC P0463. The sensor has a 500 ohm Reference Information Schematic Reference Instrument Cluster Schematics Connector End View Reference Component Connector End Views Description and Operation Instrument Cluster Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for Scan Tool Information Circuit/System Verification
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Ignition ON, verify the scan tool Fuel Tank Level Remaining parameter is between 4-98 percent. Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the fuel level sensor. 2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit terminal B and ground. If greater than the specified range, test the low reference circuit for a short to voltage 3. Ignition ON, install a 3-amp fused jumper wire between the signal circuit terminal C and the low reference circuit terminal B. Verify the scan tool Fuel Tank Level Remaining parameter If less than the specified range, test the signal circuit for a short to voltage or an 4. If all circuits test normal, test or replace the fuel level sensor. Component Testing 1. Ignition OFF, remove the fuel level sender. 2. While sweeping the fuel level sensor through its full range of motion, test for a minimum resistance value of less than 41 ohms and a maximum value greater than 119 ohms between If not within the specified range, replace the fuel level sensor. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Fuel Level Sensor Replacement (Extended Cab w/26 Gal Tank) or Fuel Level Sensor Fuel Level Sensor Replacement (15 Reg Cab w/26 gal Tank) or Fuel Level Sensor Fuel Level Sensor Replacement (Cab/Chassis - Rear Tank) for the 6.6L engine Control Module References for ECM replacement, setup, and programming
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
DTC P0464 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC P0464 Fuel Level Sensor 1 Circuit Intermittent Diagnostic Fault Information Circuit/System Description The fuel level sensor changes resistance in response to the fuel level. The engine control module This diagnostic tests for an intermittent fuel level sender signal. If a change in fuel level is Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance Fuel Level Sensor Signal P0462 1 P0463, P0464 P0463 P0461 Fuel Level Sensor Low - 1 P0463, P0464 P0463 P0461 1. Fuel Gage Inaccurate or Inoperative
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Conditions for Running the DTC The ignition is OFF. DTC P0442 is running. Conditions for Setting the DTC The fuel level change is greater than 10 percent. The above condition is present for less than 30 seconds. Both conditions above occur 2 out of 3 times as part of a refueling event test. Action Taken When the DTC Sets DTC P0442 is aborted. The ECM records the operating conditions at the time the diagnostic fails. The ECM Conditions for Clearing the DTC The DTC becomes history when the conditions for setting the DTC are no longer present. The history DTC clears after 40 malfunction-free warm-up cycles. Reference Information Schematic Reference Instrument Cluster Schematics Connector End View Reference Component Connector End Views Description and Operation Instrument Cluster Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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