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Home >> GMC >> 2001 >> Sierra 2500 HD, 2D Pickup, 6.6 1, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L - Repair Instructions >> Repair Instructions >> Fuel Injector Replacement (Left Bank) >> Installation Procedure

Installation Procedure

    Fig 1: View Of Fuel Injectors, Brackets & Injector Locating Pins
    GM660480Courtesy of GENERAL MOTORS COMPANY
  1. If the injector sleeve was pulled from the cylinder head when removing the injector(s), refer to Fuel Injector Nozzle Tube Sleeve Replacement in Engine Mechanical - 6.6L.
  2. Install a NEW O-ring onto the fuel injector(s).
  3. Lubricate the O-ring with clean engine oil.
  4. Install a NEW copper washer into the fuel injector bore in the cylinder head.
  5. Install the fuel injector with injector bracket.
  6. Refer to FASTENER NOTICE in Cautions and Notices.

    Install the injector bracket bolt.

    Tighten 

    Tighten the bolt to 50 N.m (37 lb ft).

    7. Fig 2: View Of Fuel Injector Return Pipe
    GM660477Courtesy of GENERAL MOTORS COMPANY
  7. Install the fuel injector return pipe assembly.
  8. Install the fuel injector return line to injector eye bolts and washers. Lubricate the washers with diesel fuel prior to installing.

    Tighten 

    Tighten the fuel injector return line to injector eye bolts to 16 N.m (12 lb ft).

  9. Install the fuel injector return line to cylinder head eye bolts and washers. Lubricate the washers with diesel fuel prior to installing.

    Tighten 

    Tighten the fuel injector return line to cylinder head eye bolts to 17 N.m (12 lb ft).

  10. Install the lower left valve rocker arm cover. Refer to Valve Rocker Arm Lower Cover Replacement - Left Side in Engine Mechanical - 6.6L.
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