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resistance. If the circuit tests normal, replace the ECM. 3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 2 and ground. If less than the specified range, test the 5-volt reference circuit for a short to ground or If greater than the specified range, test the 5-volt reference circuit for a short to 4. Verify the scan tool Engine Oil Pressure Sensor parameter is less than 8 kPa (1.2 psi). If greater than the specified range, test the signal circuit terminal 3 for a short to 5. Install a 3A fused jumper wire between the signal circuit terminal 3 and the 5-volt reference circuit terminal 2. Verify the scan tool Engine Oil Pressure Sensor parameter is greater than If less than the specified range, test the signal circuit for a short to ground or an 6. If all circuits test normal, test or replace the EOP sensor. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Engine Oil Pressure Sensor and/or Switch Replacement for the 4.3L engine Engine Oil Pressure Sensor and/or Switch Replacement for the 4.8L, 5.3L, 6.0L, and Engine Oil Pressure Sensor and/or Switch Replacement for the 6.6L engine Control Module References for ECM replacement, setup, and programming DTC P2066 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 P2066
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fuel Level Sensor 2 Performance Diagnostic Fault Information Circuit/System Description The primary fuel level sender and the secondary fuel level sender changes resistance based on fuel This diagnostic tests for a stuck fuel level sensor signal. The ECM sets this DTC if the fuel level Conditions for Running the DTC The engine is running. Fuel level is greater than 32 liters (8.5 gallons). Conditions for Setting the DTC The ECM detects a change in fuel level less than 3 liters (0.8 gallon) over a distance greater The vehicle is at rest and the primary fuel tank increases by 3 liters (0.8 gallon) and the Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance Fuel Level Sensor Signal P2067 1 P2068 P2068 P2066 Fuel Level Sensor Low - 1 P2068 P2068 P2066 1. Fuel Gage Inaccurate or Inoperative
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
greater than 500 seconds. Action Taken When the DTC Sets The fuel gage defaults to empty. 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. 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 Component Testing
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Ignition OFF, remove the secondary fuel level sender and verify there are no obstructions interfering with the fuel level sender. If any interference is present, repair the fuel sender interference. 2. Ignition OFF, disconnect the harness connector at the secondary fuel level sensor. 3. 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 secondary 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 DTC P2067 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 P2067 Fuel Level Sensor 2 Low Voltage Diagnostic Fault Information
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Displays and Gages - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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