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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1020 (Engine Mechanical - 6.6L (LLY)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Fuel Injection Control Module Harness Assembly Removal

Fuel Injection Control Module Harness Assembly Removal

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 left glow plug harness bracket bolts.
    2. Fig 1: View Of Left Glow Plug Harness Bracket Bolts
    GM1335443Courtesy of GENERAL MOTORS CORP.
  2. Remove the right glow plug harness bracket bolts.
    3. Fig 2: View Of Right Glow Plug Harness Bracket Bolts
    GM1335450Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the PCV hose clamp.
    4. Fig 3: View Of PCV Hose Clamp
    GM1335454Courtesy of GENERAL MOTORS CORP.
  4. Remove the right PCV pipe bolt.
    5. Fig 4: View Of Right PCV Hose/Pipe Bolt
    GM1335456Courtesy of GENERAL MOTORS CORP.
  5. Remove the left PCV pipe bolt.
    6. Fig 5: View Of Left PCV Hose/Pipe Bolt
    GM1335460Courtesy of GENERAL MOTORS CORP.
  6. Remove the PCV pipe.
    7. Fig 6: View Of PCV Pipe
    GM1335462Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the EGR valve electrical connector.
    8. Fig 7: View Of EGR Valve Electrical Connector
    GM1335463Courtesy of GENERAL MOTORS CORP.
  8. Remove the two ground bolts.
    9. Fig 8: View Of Ground Bolts
    GM1335467Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the crankshaft position sensor electrical connector.
    10. Fig 9: View Of Crankshaft Position Sensor Electrical Connector
    GM1335470Courtesy of GENERAL MOTORS CORP.
  10. Remove the tie strap from the electrical harness.
    11. Fig 10: View Of Electrical Harness Tie Strap
    GM1335476Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the fuel pressure control valve electrical connector.
    12. Fig 11: View Of Fuel Pressure Control Valve Electrical Connector
    GM1335482Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the turbocharger boost sensor electrical connector.
    13. Fig 12: View Of Turbocharger Boost Sensor Electrical Connector
    GM1335490Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the oil level sensor electrical harness connector.
    14. Fig 13: View Of Oil Level Sensor Electrical Harness Connector
    GM1335526Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the fuel temperature sensor connector.
    15. Fig 14: View Of Fuel Temperature Sensor Electrical Connector
    GM1335528Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the glow plug controller electrical connector.
    16. Fig 15: View Of Glow Plug Controller Electrical Connectors
    GM1335531Courtesy of GENERAL MOTORS CORP.
  16. Disconnect and remove the turbocharger vane position sensor.
    17. Fig 16: View Of Turbocharger Vane Position Sensor
    GM1335534Courtesy of GENERAL MOTORS CORP.
    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.
  17. Disconnect the fuel injector electrical connections.
    18. Fig 17: View Of Fuel Injector Electrical Connectors
    GM1335536Courtesy of GENERAL MOTORS CORP.
  18. Disconnect the turbocharger vane control solenoid valve.
    19. Fig 18: View Of Turbocharger Vane Control Solenoid Valve & Electrical Connector
    GM1335540Courtesy of GENERAL MOTORS CORP.
  19. Disconnect the fuel rail pressure sensor.
    20. Fig 19: View Of Fuel Rail Pressure Sensor And Electrical Connector
    GM1335543Courtesy of GENERAL MOTORS CORP.
  20. Disconnect the oil pressure sensor electrical connector.
    21. Fig 20: View Of Oil Pressure Sensor Electrical Connector
    GM1335546Courtesy of GENERAL MOTORS CORP.
  21. Remove the oil level sensor harness bolt.
    22. Fig 21: View Of Oil Level Sensor Harness Bolt
    GM1335549Courtesy of GENERAL MOTORS CORP.
  22. Remove the glow plug controller bolts.
    23. Fig 22: View Of Glow Plug Controller Bolts
    GM1336490Courtesy of GENERAL MOTORS CORP.
  23. Remove the glow plug controller.
  24. Remove the glow plug electrical connector nuts.
  25. Remove the left glow plugs.
    26. Fig 23: View Of Left Glow Plugs
    GM1335554Courtesy of GENERAL MOTORS CORP.
    Fig 24: View Of Right Glow Plugs
    GM1335557Courtesy of GENERAL MOTORS CORP.
  26. Remove the right glow plugs.
  27. Remove the fuel injector control module harness.
    28. Fig 25: View Of Fuel Injector Control Module Harness
    GM1335560Courtesy of GENERAL MOTORS CORP.
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