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Home >> GMC >> 2005 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Engine Mechanical - 6.6L (Lb7) (Repair Instructions 2 Of 4)) >> Repair Instructions (Off-Vehicle - Part 2) >> 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. Disconnect the four injector harness connectors.
  2. Disconnect the turbocharger boost sensor connector.
    3. Fig 1: View Of Turbocharger Boost Sensor Connector
    GM755187Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the fuel injection control module connectors.
  4. Disconnect the engine coolant temperature sensor connector.
    5. Fig 2: View Of Engine Coolant Temperature Sensor Connector
    GM755191Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the crankshaft position sensor connector.
    6. Fig 3: View Of Crankshaft Position Sensor Connector
    GM755194Courtesy of GENERAL MOTORS CORP.
  6. Remove the two engine block ground bolts from the right front side of the engine.
    7. Fig 4: View Of Engine Block Ground Bolts (Right Front Of Engine)
    GM761235Courtesy of GENERAL MOTORS CORP.
  7. Remove the main engine harness connector hold down bolts (1, 2).
    8. Fig 5: View Of Main Engine Harness Connector Hold Down Bolts
    GM674680Courtesy of GENERAL MOTORS CORP.
  8. Remove the main engine harness connectors.
  9. Remove the turbocharger coolant inlet hose from the turbocharger.
    10. Fig 6: View Of Turbocharger Coolant Inlet Hose
    GM761227Courtesy of GENERAL MOTORS CORP.
  10. Remove the water outlet bolts.
  11. Remove the water outlet.
  12. Remove the O-ring from the water outlet and discard.
    13. Fig 7: View Of Water Outlet, Bolts & O-Ring
    GM798877Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the fuel rail pressure regulator valve connector.
  14. Disconnect the fuel injection control module harness to the oil level sensor harness connector.
    15. Fig 8: View Of Fuel injection Control Module Harness To Oil Level Sensor Harness Connector
    GM755200Courtesy of GENERAL MOTORS CORP.
  15. Disconnect the barometric pressure sensor connector.
  16. Disconnect the fuel temperature sensor connector.
    17. Fig 9: View Of Fuel Temperature Sensor Connector
    GM755205Courtesy of GENERAL MOTORS CORP.
  17. Disconnect the 3 fuel injector control module harness to glow plug controller connectors.
  18. Remove the fuel injection control module harness assembly.
    19. Fig 10: View Of Fuel Injection Control Module Harness Assembly
    GM755210Courtesy of GENERAL MOTORS CORP.
  19. Remove the main engine harness connector bracket bolts.
  20. Remove the main engine harness connector bracket.
    21. Fig 11: View Of Main Engine Harness Connector Bracket
    GM660434Courtesy of GENERAL MOTORS CORP.
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