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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 977 (Engine Controls - 6.6L (LLY) (Introduction)) >> Repair Instructions >> Fuel Injector Feed Pipes Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement in Engine Mechanical - 6.6L (LLY).
  2. Drain the cooling system. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
    4. IMPORTANT: After removing the charged air cooler duct, cover the turbocharger opening with tape in order to prevent entry of objects.
    IMPORTANT: Do not use a screwdriver or other tool to pry the hose loose. The hose can be torn or damaged. Loosen the hose by twisting.
    Fig 1: View Of Turbocharger Clamp & Charged Air Cooler Inlet Duct Connector
    GM1334380Courtesy of GENERAL MOTORS CORP.
  4. Loosen the charged air cooler inlet duct connector to turbocharger clamp (1).
  5. Remove the charged air cooler inlet duct connector (4) from the turbocharger.
    6. Fig 2: View Of Battery Cable Junction Block Bolt At Power Steering Pump Bracket
    GM1409332Courtesy of GENERAL MOTORS CORP.
  6. Remove the battery cable to generator nut.
  7. If equipped, remove the battery cable to auxiliary generator nut.
  8. Remove the battery cable harness clip from the bracket.
  9. Remove the battery cable junction block bolt (1) from the power steering pump.
  10. Move and secure the battery cables out of the way.
    11. Fig 3: View Of Fuel Line Bracket & Nut
    GM1378748Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the fuel lines. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  12. Remove the fuel line bracket nut.
  13. Remove the fuel line bracket from the stud.
    14. Fig 4: View Of Main Engine Electrical Harness Connector Latches & Harness Clip
    GM1409327Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the main engine electrical harness connectors. Lift up on the latches (1) in order to disconnect the connectors.
  15. Open the harness clip (2).
  16. Remove the main engine electrical harness connectors.
    17. Fig 5: View Of Main Engine Electrical Harness Connector Bolts
    GM1334916Courtesy of GENERAL MOTORS CORP.
  17. Remove the engine harness main electrical connectors bolts.
    18. Fig 6: View Of Main Electrical Connector Harness Bracket & Bolts
    GM1334948Courtesy of GENERAL MOTORS CORP.
  18. Disconnect the barometric sensor electrical connector.
  19. Remove the engine harness main connector bracket bolts.
  20. Remove the water outlet tube. Refer to Water Outlet Tube Replacement (6.6L (LB7) Engine) or Water Outlet Tube Replacement (6.6L (LLY) Engine) in Engine Cooling.
  21. Remove the auxiliary generator, if equipped. Refer to Generator Replacement - Auxiliary (6.6L (LB7) Engine) or Generator Replacement - Auxiliary (6.6L (LLY) Engine) in Engine Electrical.
    22. Fig 7: View Of Glow Plug Controller Electrical Connectors
    GM1335531Courtesy of GENERAL MOTORS CORP.
  22. Disconnect the glow plug controller electrical connector.
    23. Fig 8: Glow Plug Controller Battery Feed Electrical Connector
    GM1409333Courtesy of GENERAL MOTORS CORP.
  23. Disconnect the glow plug controller battery feed electrical connector (1).
  24. Remove the positive crankcase ventilation (PCV) hose/pipe. Refer to Crankcase Ventilation Hoses/Pipes Replacement in Engine Mechanical - 6.6L (LLY).
    25. Fig 9: View Of Left Fuel Injector Pipes
    GM1335608Courtesy of GENERAL MOTORS CORP.
  25. Prior to removing the fuel injector pipes, use compressed air to blow any debris from between the injector line and fittings. Wipe the fittings clean of debris.
  26. Spray lithium grease, GM P/N 12346293 or equivalent, between the fuel injector line and fittings to assist in containing any debris during removal.
    27. NOTE: DO NOT use compressed air to clean debris from the fuel injector inlet after the fuel line is removed. Using compressed air can allow debris to enter the fuel injector inlet and damage the fuel injector.
  27. Remove the left fuel injector pipes.
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