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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1680 (Engine Mechanical - 6.6L (LMM) - Repair Instructions - Off Vehicle (1 Of 3)) >> Engine Wiring Harness Assembly Removal

Engine Wiring Harness Assembly Removal

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Left Glow Plug Harness Bracket Bolts
    GM1335443Courtesy of GENERAL MOTORS CORP.
  1. Remove the left glow plug harness bracket bolts.
    2. Fig 2: View Of Right Glow Plug Harness Bracket Bolts
    GM1335450Courtesy of GENERAL MOTORS CORP.
  2. Remove the right glow plug harness bracket bolts.
    3. Fig 3: View Of PCV Hose Clamp
    GM1335454Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the positive crankcase ventilation (PCV) hose clamp.
    4. Fig 4: View Of Right PCV Hose/Pipe Bolt
    GM1335456Courtesy of GENERAL MOTORS CORP.
  4. Remove the right PCV pipe bolt.
    5. Fig 5: View Of Left PCV Hose/Pipe Bolt
    GM1335460Courtesy of GENERAL MOTORS CORP.
  5. Remove the left PCV pipe bolt.
    6. Fig 6: View Of PCV Pipe
    GM1335462Courtesy of GENERAL MOTORS CORP.
  6. Remove the PCV pipe.
    7. Fig 7: Identifying EGR Valve Electrical Connector
    GM1662870Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the exhaust gas recirculation (EGR) valve electrical connector.
    8. Fig 8: Identifying Ground Bolt On Engine Block
    GM1662872Courtesy of GENERAL MOTORS CORP.
  8. Remove the ground bolt.
    9. Fig 9: View Of Crankshaft Position Sensor Electrical Connector
    GM1335470Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the crankshaft position sensor electrical connector.
    10. Fig 10: View Of Fuel Pressure Control Valve Electrical Connector
    GM1335482Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the fuel pressure control valve electrical connector.
    11. Fig 11: View Of Oil Level Sensor Electrical Harness Connector
    GM1335526Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the oil level sensor electrical harness connector.
    12. Fig 12: View Of Fuel Temperature Sensor Electrical Connector
    GM1335528Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the fuel temperature sensor connector.
    13. Fig 13: Identifying Glow Plug Controller
    GM1662873Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the glow plug controller electrical connector.
    14. Fig 14: View Of Turbocharger Vane Position Sensor
    GM1335534Courtesy of GENERAL MOTORS CORP.
  14. Disconnect and remove the turbocharger vane position sensor.
    15. Fig 15: View Of Fuel Injector Electrical Connectors
    GM1335536Courtesy of GENERAL MOTORS CORP.
    CAUTION: 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.
  15. Disconnect the fuel injector electrical connections.
    16. Fig 16: View Of Turbocharger Vane Control Solenoid Valve & Electrical Connector
    GM1335540Courtesy of GENERAL MOTORS CORP.
  16. Disconnect the turbocharger vane control solenoid valve.
    17. Fig 17: View Of Fuel Rail Pressure Sensor & Electrical Connector
    GM1335543Courtesy of GENERAL MOTORS CORP.
  17. Disconnect the fuel rail pressure sensor.
    18. Fig 18: View Of Oil Pressure Sensor Electrical Connector
    GM1335546Courtesy of GENERAL MOTORS CORP.
  18. Disconnect the oil pressure sensor electrical connector.
    19. Fig 19: View Of Oil Level Sensor Harness Bolt
    GM1335549Courtesy of GENERAL MOTORS CORP.
  19. Remove the oil level sensor harness bolt.
    20. Fig 20: Identifying glow Plug Controller Bolts
    GM1650645Courtesy of GENERAL MOTORS CORP.
  20. Remove the glow plug controller bolts.
  21. Remove the glow plug controller.
  22. Remove the glow plug controller shield bolts.
  23. Remove the glow plug controller shield.
    24. Fig 21: Glow Plug Controller Bracket Bolt
    GM1650648Courtesy of GENERAL MOTORS CORP.
  24. Remove the glow plug controller bracket bolts.
    25. Fig 22: Identifying Glow Plug Controller Bracket
    GM1650651Courtesy of GENERAL MOTORS CORP.
  25. Remove the glow plug controller bracket.
    26. Fig 23: View Of Left Glow Plugs
    GM1335554Courtesy of GENERAL MOTORS CORP.
  26. Remove the left glow plugs.
    27. Fig 24: View Of Right Glow Plugs
    GM1335557Courtesy of GENERAL MOTORS CORP.
  27. Remove the right glow plugs.
    28. Fig 25: View Of Fuel Injector Control Module Harness
    GM1335560Courtesy of GENERAL MOTORS CORP.
  28. Remove the engine wiring harness.
    29. Fig 26: Identifying Engine Harness Bracket & Bolts
    GM1662875Courtesy of GENERAL MOTORS CORP.
  29. Remove the engine harness bracket bolts.
  30. Remove the engine harness bracket.
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