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Fuel Rail Assembly (CNG Only): Reassembly

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.
WARNING: Natural gas is stored under high pressure. If a leak occurs, the high pressure could cause a personal injury. In order to prevent Compressed Natural Gas (CNG) fuel leaks, always replace the CNG fuel system "O" rings during service.
  1. Install the fuel rail pressure sensor and fuel rail temperature sensor into the fuel rail using NEW "O" rings. Lubricate the NEW "O" rings with petroleum jelly. Install the fuel rail pressure sensor and fuel rail temperature sensor hold-down and bolt, if equipped. Tighten the bolt to specification. See TORQUE SPECIFICATIONS  .
  2. Install the fuel injector into the fuel rail using a NEW "O" ring. Lubricate the NEW "O" ring with petroleum jelly. Install the fuel injector retainer clip. Lubricate the NEW injector tip "O" ring with clean engine oil. Repeat procedure for the remaining fuel injectors.
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