CTS V8-5.7L VIN P (2004)
Fuel Rail: Service and Repair
FUEL RAIL ASSEMBLY REPLACEMENT
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
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.
1. Remove the fuel injector sight shield.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure.
3. 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.
4. Remove the engine compartment fuel line (3).
5. Disconnect the engine compartment evaporative emission (EVAP) line (1) from the chassis EVAP line.
6. Disconnect the engine compartment EVAP line from the purge valve.
7. Remove the EVAP line from the vehicle.