GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L (LBZ and LLY) 🢒 Fuel Injection Fuel Feed Pipe Replacement - Left Side

Removal Procedure

    Important: After removing the charged air cooler duct, cover the turbocharger opening with tape in order to prevent entry of objects.

  1. Remove the air cleaner . Refer to Air Cleaner Replacement .
  2. Drain the cooling system. Refer to Cooling System Draining and Filling .
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  4. Remove the charged air cooler inlet pipe from the turbocharger. Refer to Charged Air Cooler Hoses/Pipes Replacement
  5. Remove the fuel filter. Refer to Fuel Filter Replacement .

    6. Object Number: 1395836 Size: SH
  6. Remove the battery cable to generator nut.
  7. If equipped, remove the battery cable to auxiliary generator nut.

    8. Object Number: 1378748 Size: SH
  8. Disconnect the fuel lines. Refer to Metal Collar Quick Connect Fitting Service .
  9. Remove the fuel line bracket nut.
  10. Remove the fuel line bracket from the stud.

    11. Object Number: 674653 Size: SH
  11. Disconnect the engine harness main connectors. Lift up on the latch in order to disconnect the connectors.

    12. Object Number: 1334916 Size: SH
  12. Remove the engine harness main electrical connectors screws.

    13. Object Number: 1334948 Size: SH
  13. Remove the engine harness main connector bracket bolts.
  14. Remove the water outlet tube. Refer to Water Outlet Tube Replacement .
  15. Remove the auxiliary generator, if equipped. Refer to Auxiliary Generator Replacement .

    16. Object Number: 1335454 Size: SH
  16. Reposition the left positive crankcase ventilation (PCV) hose clamp.
  17. Disconnect the left PCV hose.

    18. Object Number: 1335460 Size: SH
  18. Remove the left PCV pipe bolt.
  19. Remove the left PCV pipe.

    20. Object Number: 1335608 Size: SH
  20. Remove the fuel injector pipes.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1335608 Size: SH
  1. Install the fuel injector pipes.

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


    Object Number: 1335460 Size: SH
  2. Install the left PCV pipe.
  3. Install the left PCV pipe bolt.

    4. Tighten
    Tighten the bolt to 18 N·m (13 lb ft).


    Object Number: 1335454 Size: SH
  4. Connect the left PCV hose.
  5. Position the left PCV hose clamp.
  6. Install the auxiliary generator, if equipped. Refer to Auxiliary Generator Replacement .
  7. Install the water outlet tube. Refer to Water Outlet Tube Replacement .

    8. Object Number: 1334948 Size: SH
  8. Install the engine harness main connector bracket bolts.

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


    Object Number: 1334916 Size: SH
  9. Install the engine harness main electrical connectors screws.

    10. Tighten
    Tighten the screws to 10 N·m (89 lb in).


    Object Number: 674653 Size: SH
  10. Connect the engine harness main connectors.

    11. Object Number: 1378748 Size: SH
  11. Install the fuel line bracket from the stud.
  12. Install the fuel line bracket nut.

    13. Tighten
    Tighten the nut to 21 N·m (15 lb ft).

  13. Connect the fuel lines. Refer to Metal Collar Quick Connect Fitting Service .

    14. Object Number: 1395836 Size: SH
  14. Position the generator positive cable.
  15. Install the generator positive cable in the clip on the engine front cover.
  16. Install the generator positive cable and nut to the generator.

    17. Tighten
    Tighten the nut to 9 N·m (80 lb in).

  17. Install the battery positive cable junction block bracket and bolt to the power steering bracket.

    18. Tighten
    Tighten the bolt to 9 N·m (80 lb in).

  18. Remove the tape from the turbocharger openings.

    19. Important: Lubricate the end of the duct prior to installation.

  19. Install the charged air cooler inlet pipe to the turbocharger. Refer to Charged Air Cooler Hoses/Pipes Replacement .
  20. Install the fuel filter. Refer to Fuel Filter Replacement .
  21. Install the air cleaner. Refer to Air Cleaner Replacement .
  22. Fill the cooling system. Refer to Cooling System Draining and Filling .
  23. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  24. Prime the fuel system. Refer to Fuel System Priming .
  25. Start the engine. If the engine stalls, repeat the above step.
  26. Once the engine starts, inspect for fuel leaks.