Removal Procedure
An 8-digit identification number is located on the fuel rail assembly. Refer to this model identification number if servicing or part replacement is required.
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
- 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.
- Prevent dirt and other contaminants from entering the open pipes and passages. Cap the fittings and plug the holes when servicing the fuel system.
- Remove the left fuel rail cover.
- Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure .
- Remove the right fuel rail cover.
- 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.
- Disconnect the fuel feed hose (2) from the fuel rail (1). Refer to Quick Connect Fitting(s) Service (Metal Collar) .
- 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.
- Note the location of the fuel rail ground strap (1) on the intake manifold. The fuel rail ground strap must be installed during assembly.
- Remove the fuel rail attaching bolts.
- Remove the fuel rail assembly.
- Remove the injector lower O-ring seal from the spray tip end of each injector.
- Discard the lower O-ring seals.
CAUTION:
Refer to Battery Disconnect Caution
in Cautions and Notices.
NOTE: