Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
If any other DTCs are set other than DTC P009E, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Remove the fuel pressure relief valve return hose and plug the hose to prevent fuel leakage.
- Install a section of rubber fuel hose on the fuel pressure relief valve connection and place loose end of hose into a clean fuel container.
- If the engine cranks but does not start, crank the engine for 15 seconds. Observe for no fuel leaking from fuel pressure relief valve.
IMPORTANT: Fuel that is contaminated with gasoline may cause permanent damage to the fuel pressure relief valve. Refer to Contaminants-in-Fuel Diagnosis .- If fuel leaks from the fuel pressure relief valve, replace the pressure relief valve. Refer to Fuel Pressure Relief Valve Replacement .
- If the engine starts and runs, idle the engine while commanding the fuel rail pressure to 180 MPa with a scan tool. Observe for no fuel leaking from fuel pressure relief valve.
- If fuel leaks from the fuel pressure relief valve, replace the pressure relief valve. Refer to Fuel Pressure Relief Valve Replacement .
- If the circuits test normal, go to Diagnostic Aids.