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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Engine Performance System Removal, Overhaul & Installation - Bi-Fuel) >> Fuel Systems >> Fuel Tanks >> Removal & Installation Front Fuel Tank

Removal & Installation Front Fuel Tank

WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE  .
  2. Disconnect the negative battery cable. Remove the fuel tank shield. See FUEL TANK SHIELD  . Vent the CNG fuel from the CNG fuel tank if necessary. See FUEL TANK VENTING PROCEDURE  under FUEL SYSTEM PRESSURE RELEASE. Disconnect the electrical connectors at the high pressure lock-off solenoid as necessary. Disconnect the fuel outlet line from the High Pressure Lock-Off (HPL) solenoid. Disconnect the fuel inlet line at the high pressure lock-off solenoid fitting. Mark the tanks as front and rear prior to removal from the vehicle.
  3. Place CNG Tank Lifting Fixture (J 45038) using a suitable lifting device such as a transmission lift jack beneath the tank to be removed ensuring placement is between the tank straps. Remove and discard the retaining nut and bolt. Remove the tank strap upper mounting pins. Remove the tank straps from the vehicle. Lower the fuel tank from the vehicle. Remove the tank from the lift jack using CNG Tank Lifting Bar (J 45529) and a suitable lifting device.
  4. To install, position the tank onto the lift jack using CNG tank lifting bar and a suitable lifting device. Raise the fuel tank into the tank mounting frame, ensuring that the high pressure lock-off solenoid is properly oriented to the fuel lines. Place the straps into the tank mounting bracket. Install the tank strap upper mounting pins. Install the new tank strap mounting nuts and bolts. Tighten the tank strap mounting bolts. See TORQUE SPECIFICATIONS  .
  5. Connect the fuel inlet line at the front tank high pressure lock-off solenoid fitting using NEW "O" rings. Lubricate the "O" rings with petroleum jelly or equivalent before installation. Connect the fuel outlet line to the high pressure lock-off using NEW "O" rings. Tighten fittings. See TORQUE SPECIFICATIONS  . Connect the electrical connectors at the high pressure lock-off solenoid as necessary. 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.
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