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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1026 (Engine Controls And Fuel - 6.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Injector Replacement (Left) >> Removal Procedure

Removal Procedure

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    Fig 1: View Of Fuel Injector Electrical Connectors
    GM1335536Courtesy of GENERAL MOTORS CORP.
  1. Remove the left fuel injection fuel feed pipes. Refer to Fuel Injection Fuel Feed Pipe Replacement - Left Side .
  2. Remove the left fuel injection fuel return pipe. Refer to Fuel Injection Fuel Return Pipe Replacement - Left Side .
    3. NOTE: Label all the injector electrical connectors before the connectors are removed in order to prevent reconnecting to the wrong injector. Failure to properly connect the injectors in the correct sequence will cause severe engine damage.
  3. Disconnect the engine wiring harness electrical connectors from the fuel injectors.
    4. Fig 2: View Of Left Fuel Injector Bracket Bolts
    GM1335618Courtesy of GENERAL MOTORS CORP.
  4. Remove the fuel injector bracket bolts.
    5. Fig 3: J-46594 Installed In Bolt Hole In The Fuel Injector Bracket
    GM1866973Courtesy of GENERAL MOTORS CORP.
  5. Install the J-46594  (1) into the bolt hole in the fuel injector bracket. See Special Tools .
  6. Install a flare nut wrench onto the J-46594  and pull back away from the fuel injector, until the injector releases from its seat. See Special Tools .
  7. Remove the J-46594  . See Special Tools .
    8. Fig 4: View Of Left Fuel Injectors W/Brackets
    GM1335621Courtesy of GENERAL MOTORS CORP.
  8. Remove the fuel injectors with brackets.
    9. Fig 5: Identifying Fuel Injector Copper Washers
    GM1335628Courtesy of GENERAL MOTORS CORP.
  9. If necessary, remove the fuel injector bracket pins.
  10. Remove and discard the copper washer from the fuel injector bore.
  11. Remove and discard the O-ring from the fuel injector.
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