Removal & Installation (High Pressure Regulator (HPR) Union-To-High Pressure Regulator (HPR) Hose)
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
- Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect the negative battery cable. Remove the fuel tank shield. See FUEL TANK SHIELD . Disconnect the fuel line fitting at the line union.
- Remove the fuel line clamp bolt. Remove the clips that hold the fuel line to the brake line. Observe where the clips connect to the brake line for reinstallation. Disconnect the fuel line from the high pressure regulator. Remove the fuel line assembly from the vehicle.
- To install, route the fuel line assembly along the frame between the line union fitting and the high pressure regulator. Lubricate the "O" rings with petroleum jelly or equivalent before installation. Connect the fuel line to the high pressure regulator using new "O" rings.
- Tighten the fuel line. See TORQUE SPECIFICATIONS . Install the fuel line clamp bolt. Install the clips that hold the fuel line to the brake line at the locations previously observed. Connect the negative battery cable. Prime the CNG fuel system by cycling the ignition ON and OFF several times. Start the engine and use Ultrasonic Leak Detector (J 41416) in order to inspect for CNG fuel system leaks at each serviced fitting. Install the fuel tank shield. See FUEL TANK SHIELD .