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Home >> GMC >> 2004 >> Sierra 2500 HD, 2D Pickup, 6.6 1, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L (Lb7) (Introduction) >> Repair Instructions >> Fuel Injection Control Module Replacement >> Removal Procedure

Removal Procedure

  1. 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.
  2. Unsnap the positive battery cable cap.
  3. Loosen the positive battery cable bolt.
  4. Remove the positive battery cable.
    5. Fig 1: View Of Battery & Positive Battery Cable
    GM662504Courtesy of GENERAL MOTORS CORP.
  5. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  6. Remove the fuel fill cap in order to relieve the fuel pressure.
  7. Cut and discard the large tie straps from the control module (6) and harness.
  8. Remove the fuel line bolts (4) from the control module (6).
  9. Remove the control module bolts (1, 5).
  10. Remove the control module insulators (2) between the module and bracket.
    11. Fig 2: View Of Fuel Injection Control Module Components
    GM660358Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not break off the tab on the electrical connector.
  11. Disconnect the control module electrical connectors (2).
    12. Fig 3: Fuel Injection Control Module Electrical Connectors
    GM744247Courtesy of GENERAL MOTORS CORP.
  12. Remove the fuel lines (2) from the control module (1) and discard washers.
  13. Remove the control module (1) from the bracket.
    14. Fig 4: Fuel Injection Control Module & Fuel Lines
    GM744237Courtesy of GENERAL MOTORS CORP.
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