CTS-V V8-6.0L VIN U (2006)
Fuel Injector: Service and Repair
Fuel Injector and Fuel Rail Replacement
FUEL INJECTOR AND FUEL RAIL REPLACEMENT
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
CAUTION: Refer to Battery Disconnect Caution.
2. Remove the engine sight shield.
NOTE:
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Carefully remove the fuel rail assembly in order to prevent damage to the injector electrical connector terminals and the injector spray tips.
Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
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Prevent dirt and other contaminants from entering the open pipes and passages. Cap the fittings and plug the holes when servicing the fuel system.
3. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief.
4. Clean the fuel rail assembly with a spray type engine cleaner, GM X-30A or equivalent, if necessary. Follow the package instructions. Do not soak
the fuel rail in liquid cleaning solvent.
5. Remove the engine compartment fuel line.
6. Disconnect the engine compartment evaporative emission (EVAP) line from the chassis EVAP line.
7. Disconnect the fuel injector electrical connectors. Identify the connectors to their corresponding injectors in order to ensure the correct sequential
injector firing order after reassembly.
8. Remove the fuel injector wiring harness retainers from the fuel rail.