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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 266 (ENGINE CONTROLS - REMOVAL & INSTALLATION)FUEL SYSTEMS (CNG)FUEL TANKINSTALLATION
2004 Oldsmobile Bravada AWD

Fuel Tank: Installation

2004 Oldsmobile Bravada AWDSECTION Installation
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the CNG Tank Remover into the tank strap bolt holes. See Figure. The straps are not required for installation.
  2. Lower the tank onto the CNG Tank Remover using a lifting device and the CNG Tank Sling. See Figure.
  3. Roll the tank to the proper position using the orientation marks.
  4. Raise the CNG Tank Remover and roll the tank into position in the tank cradle.
  5. Verify the alignment of the HPL inlet fitting. The fitting should be at the 3 o'clock position.
  6. The HPL should be 10.5" (26.7 cm) from the left edge of the left tank strap. See Fig 1.
  7. Remove the CNG Tank Remover from the bracket.
  8. Install the tank straps.
  9. Install the tank strap bridge pins and the clevis pins. Figure
  10. Install the NEW tank strap bolts and the NEW nuts. See Figure. Tighten the tank strap nuts to specification. See TORQUE SPECIFICATIONS .
  11. Install the Pressure Relief Device (PRD) line and the HPL to HPR lines and the vent hose as an assembly. See Fig 2.
  12. Connect the PRD and the HPL to HPR lines using new "O" ring face seals. Lubricate the "O" rings with petroleum jelly, or equivalent. Tighten the PRD line fitting to specification. See TORQUE SPECIFICATIONS .
  13. Install the fill valve to union fill line using new "O" ring face seals. Lubricate the "O" rings with petroleum jelly or the equivalent. Tighten the fill line fittings to specification. See TORQUE SPECIFICATIONS .
  14. Install the union to HPL fill line using new "O" ring face seals. Lubricate the "O" rings with petroleum jelly or the equivalent. Tighten the fill line fittings to specification. See TORQUE SPECIFICATIONS .
  15. Connect the harness connectors and the HPL power connector.
  16. Connect the negative battery cable. Tighten to specification. See TORQUE SPECIFICATIONS .
  17. Fill the CNG fuel system.
  18. Start the engine. Check for CNG fuel leaks at each serviced fitting using the Combustible Gas Detector (J 45878), or equivalent.
  19. Position the 4 hose clamps at the vent boot, the vent hose and the fill valve boot. Tighten the four hose clamps to specification. See TORQUE SPECIFICATIONS .
  20. Install the vent boot cover and the cover nuts. Tighten the vent boot cover nuts to specification. See TORQUE SPECIFICATIONS .
  21. Install the left side trunk carpet.
  22. Install the cargo net knobs and the cargo net.
  23. Install the trunk trim.
  24. Install the spare tire bracket and the spare tire bracket bolts. See Figure. Tighten the spare tire bracket bolts to specification. See TORQUE SPECIFICATIONS .
  25. Install the fuel tank cover. Tighten the fuel tank cover nuts to specification. See TORQUE SPECIFICATIONS .
Fig 1: Positioning CNG Tank
G00217314Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.