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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1142 (Engine Controls - 6.0L - Alternative Fuels (Introduction)) >> Repair Instructions >> Fuel Tank Bracket and Mounting Replacement (Cab/Chassis) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the CNG fuel tank. Refer to Fuel Tank Replacement (Pickup with Type 2 Tank)  or Fuel Tank Replacement (Cab/Chassis with Type 2 Tank) .
    2. Fig 1: Identifying Fuel Line Hold-Down Components
    GM1203079Courtesy of GENERAL MOTORS CORP.
  2. Remove the fuel line hold-down clips (1, 4).
  3. Disconnect the fuel line at the fuel filter inlet (2).
  4. Disconnect the fuel line at the high pressure regulator (HPR) inlet (3).
  5. Remove the fuel lines from the vehicle.
    6. Fig 2: Identifying Fuel Filter/Fuel Line Assembly Components
    GM1203089Courtesy of GENERAL MOTORS CORP.
  6. Remove the fuel filter bracket mounting bolts (2, 4)
  7. Remove the fuel filter/fuel line assembly from the vehicle.
    8. Fig 3: Identifying High Pressure Regulator (HPR) Components
    GM757008Courtesy of GENERAL MOTORS CORP.
  8. Partially drain the engine coolant. Refer to Draining and Filling Cooling System (with HP2) Draining and Filling Cooling System (without HP2) in Engine Cooling in the C/K Pickup Service Manual.
  9. Loosen the hose clamps (2, 6) enough to move the clamps away from the HPR coolant fittings.
  10. Disconnect the HPR coolant hoses (3, 5) from the HPR.
  11. Pull the HPR coolant hoses through the tank mounting frame.
  12. Disconnect the HPR fuel outlet line (4).
    13. Fig 4: Identifying High Pressure Regulator (HPR) Inlet Fitting Components
    GM327075Courtesy of GENERAL MOTORS CORP.
  13. Remove the HPR fuel inlet fitting (6). Capture the filter spring (4), filter (3) and seal (2) that are located behind the inlet fitting.
    14. Fig 5: Identifying High Pressure Regulator (HPR) Components
    GM757008Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not hold the HPR at the cover hex flange. As required, wedge a wrench between the HPR and the tank frame in order to keep the HPR from spinning in the bracket.
  14. Remove the HPR mounting nut (1) and washer.
  15. Remove the HPR from the mounting bracket.
    16. Fig 6: Locating Tank Mounting Plate-To-Frame Bolts and Nuts
    GM1203085Courtesy of GENERAL MOTORS CORP.
  16. Remove and discard the tank mounting plate to vehicle frame bolts and nuts (1, 2).
  17. Remove the CNG fuel tank mounting plate from the vehicle.
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