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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls - 6.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Injector Replacement (Right) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. If necessary, install a NEW O-ring onto the fuel injector.
  2. If necessary, install a NEW copper washer to the fuel injector bore.
    Fig 1: Identifying Fuel Injector Copper Washers
    GM1335628Courtesy of GENERAL MOTORS CORP.
  3. If necessary, install the fuel injector bracket pins.
    4. Fig 2: View Of Right Fuel Injectors W/Brackets
    GM1335625Courtesy of GENERAL MOTORS CORP.
  4. Install the fuel injectors with brackets.
    5. Fig 3: Installing Right Fuel Injector Bracket Bolts
    GM1335619Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  5. Install the fuel injector bracket bolts.

    Tighten:  Tighten the bolts to 30 N.m (22 lb ft).

    6. Fig 4: View Of Fuel Injector Electrical Connectors
    GM1335536Courtesy of GENERAL MOTORS CORP.
  6. Connect the fuel injector electrical connectors.
    7. Fig 5: View Of Right Fuel Return Hose & Injectors
    GM1335592Courtesy of GENERAL MOTORS CORP.
  7. Install the fuel return hose to the injectors.
  8. Install the fuel return hose clips.
    9. NOTE: Ensure proper torquing of the fuel injector line. An under-torqued fuel injector line will not seal properly and an over-torqued fuel injector line may damage the fuel injector fitting. An improperly sealed or damaged fuel injector line or fuel injector fitting will cause a fuel leak.
    Fig 6: View Of Fuel Injector Pipes
    GM1335614Courtesy of GENERAL MOTORS CORP.
  9. Install the fuel injector pipes.

    Tighten:  Tighten the fittings to 41 N.m (30 lb ft).

  10. After installing the fuel injector pipes, clean the injector pipes and apply sealant GM P/N 97720043, at the fittings to prevent moisture and debris from collecting between the line and fitting.
  11. Install the bracket.
  12. Install the oil level indicator tube bracket bolts.
    Fig 7: Installing Tube Bracket Bolts
    GM1601448Courtesy of GENERAL MOTORS CORP.

    Tighten:  Tighten the bolts to 21 N.m (15 lb ft).

  13. Install the oil level indicator tube bolt.

    Tighten:  Tighten the bolt to 21 N.m (15 lb ft).

  14. Install the wiring harness retainer to the bracket.
  15. Install the fuel filter with bracket. Refer to Fuel Filter Replacement .
  16. Install a NEW quick connect fitting clip to the charged air cooler duct.
  17. Install the charged air cooler outlet duct to the intake.
    Fig 8: Installing Charged Air Cooler Outlet Duct
    GM1653035Courtesy of GENERAL MOTORS CORP.
  18. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  19. If the fuel injectors were replaced, refer to Fuel Injector Flow Rate Programming .
  20. Prime the fuel system. Refer to Fuel System Priming .
  21. Start the engine. If the engine stalls, repeat the above step.
  22. Once the engine starts, inspect for fuel leaks.
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