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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 4.3L (LV1) - Repair Instructions) >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement - Bank 1 >> Removal Procedure

Removal Procedure

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  1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection (Single Battery) , or Battery Negative Cable Disconnection and Connection (Dual Battery)
  2. GM4853010Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    The noise cancelling foam component MUST be replaced if it has been exposed to engine fluids. Failure to replace the noise cancelling foam component that has been exposed to engine fluids may result in an engine fire resulting in catastrophic engine damage, and possible injury or death.

    Remove the fuel pump insulator (1). Fuel Pump Insulator Replacement 

  3. GM4856258Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe. If the fuel feed intermediate pipe fittings are loosened or the pipe is removed, the pipe MUST be replaced.

    Remove and DISCARD the fuel feed intermediate pipe - position 1. Fuel Feed Intermediate Pipe Replacement - Position 1 

  4. Remove the fuel feed pipe - at engine. Fuel Feed Pipe Replacement (Short/Long Wheel Base) , or Fuel Feed Pipe Replacement (Chassis Cab Front Tank) , or Fuel Feed Pipe Replacement (Chassis Cab Rear Tank) , or Fuel Feed Pipe Replacement (At Engine) 
  5. GM4855330Courtesy of GENERAL MOTORS COMPANY

    Disconnect the electrical connector (1).

  6. GM4855333Courtesy of GENERAL MOTORS COMPANY

    Open the tape (1) holding the fuel injector wiring harness (2) to the fuel injection fuel rail.

  7. Disconnect the fuel injector wiring harness (2) from the fuel injectors, the fuel injection fuel rail fuel pressure sensor, and the bracket.
  8. Reposition the fuel injector wiring harness (2) to make room for the special tools.
  9. GM4855428Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The fuel injection fuel rail bolts are retained with the fuel injection fuel rail insulators and may be difficult to remove.

    Remove the fuel injection fuel rail bolts (1).

  10. GM4855430Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The EN-49248  remover hooks MUST be properly seated on the underside of the fuel injection fuel rail.

    Install the EN-49248  remover components (1) and slowly work the fuel injection fuel rail (2) upwards in small, even increments.

  11. Once the fuel injection fuel rail (2) is free, remove the EN-49248  remover components (1).
  12. GM4855432Courtesy of GENERAL MOTORS COMPANY
    CAUTION:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.

    Remove the fuel injection fuel rail (1).

  13. Remove the fuel injection fuel rail fuel pressure sensor. Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement 
  14. GM4855984Courtesy of GENERAL MOTORS COMPANY

    Inspect the fuel injection fuel rail insulators (1) and replace if necessary.