Avalanche 2500 4WD V8-8.1L VIN G (2003)
Fuel Rail: Service and Repair
FUEL RAIL ASSEMBLY REPLACEMENT
REMOVAL PROCEDURE
IMPORTANT: An eight digit identification number is located on the fuel rail. Refer to this number if servicing, or part replacement is required.
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
2. Remove the engine sight shield.
3. Disconnect the generator electrical connector (1).
4. Disconnect the evaporative emission (EVAP) canister purge valve electrical connector.
5. Disconnect the electronic throttle control (ETC) electrical connector (5).
6. Remove the engine harness bolt and studs.
7. Reposition the engine harness to the drivers side of the engine compartment.
8. Identify the fuel injector connectors to their corresponding injectors in order to ensure correct sequential injector firing order after reassembly.
9. Pull the top portion (2) of the connector up. Do not pull the top portion of the connector past the top of the white portion (1).
