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Fuel Rail Assembly (CNG Only): Removal

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Combustible Gas Detector (J-45878) is required for this procedure. See Figure .
  1. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE  . Disconnect the negative battery cable(s). Before removal, clean the fuel rail assembly with a spray type engine cleaner if necessary. Do not soak fuel rails in liquid cleaning solvent. Remove the engine sight shield.
  2. Loosen and remove the fuel line-to-rail clamps. See Figure . Remove the fuel line retainers. Disconnect the fuel lines from the fuel rails. Disconnect the fuel rail temperature sensor and fuel rail pressure sensor electrical connectors. See Figure . Identify the injector connectors to their corresponding engine cylinder to ensure correct sequential injector firing order after reassembly. Disconnect the 8 fuel injector electrical connectors. Remove the fuel rail attaching bolts. Remove the fuel rail with injectors as an assembly.
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