Removal & Installation (Rear High Pressure Lock-Off (HPL) Solenoid-To-Front High Pressure Lock-Off (HPL) Solenoid)
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 at the rear tank high pressure lock-off fitting. Disconnect the fuel line at the front tank high pressure lock-off fitting and remove the fuel line from the vehicle.
- Connect the fuel line to the front tank high pressure lock-off fitting using NEW "O" rings. Lubricate "O" ring with petroleum jelly or equivalent before installation. Tighten the fuel line fitting. See TORQUE SPECIFICATIONS . Connect the fuel line to the rear tank high pressure lock-off fitting using new "O" rings.
- Tighten the fuel line fitting. See TORQUE SPECIFICATIONS . 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 45878) in order to inspect for CNG fuel system leaks at each serviced fitting. Install the fuel tank shield. See FUEL TANK SHIELD .