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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Electrical >> Starter >> Battery, Charging System And Starting System - Introduction >> Repair Instructions >> Starter/Generator Control Module (SGCM) Replacement (5.3L Engine w/RPO HP2) >> Removal Procedure

Removal Procedure

  1. Disconnect the energy storage box (ESB). Refer to Energy Storage Box (ESB) Service Disconnect/Connect (5.3L Engine w/RPO HP2) .
  2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
  3. Remove the surge tank. Refer to Surge Tank Replacement in Engine Cooling.
  4. Remove the starter/generator control module (SGCM) coolant tank. Refer to Coolant Tank - Starter/Generator Control Module Replacement in Engine Cooling.
  5. Remove the SGCM cover bolts, and cover.
    Fig 1: View Of SGCM, Cover & Bolts
    GM1237061Courtesy of GENERAL MOTORS CORP.
  6. Remove the 3-phase cable nuts to the SGCM.
  7. Remove the 3-phase cable from the SGCM.
  8. Remove the connector position assurance (CPA) retainer on the engine harness electrical connector.
    Fig 2: View Of CPA Retainer On Engine Harness Electrical Connector (5.3L Engine w/RPO HP2)
    GM1480429Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the engine harness electrical connector.
  10. Disconnect the accessory power receptacle electrical connector from the SGCM.
    Fig 3: View Of SGCM Accessory Power Receptacle Electrical Connector (5.3L Engine w/RPO HP2)
    GM1257479Courtesy of GENERAL MOTORS CORP.
  11. Reposition the SGCM coolant outlet hose clamp (2).
    Fig 4: View Of SGCM Coolant Outlet Hose & Clamp (5.3L Engine w/RPO HP2)
    GM1480439Courtesy of GENERAL MOTORS CORP.
  12. Remove the SGCM coolant outlet hose (1).
  13. Loosen the 14-volt positive/negative battery cable bolt (1).
    Fig 5: View Of 14V Positive/Negative Battery Cable Bolt (5.3L Engine w/RPO HP2)
    GM1237045Courtesy of GENERAL MOTORS CORP.
  14. Remove the red connector position assurance (CPA) retainer.
  15. Disconnect the 14-volt positive/negative battery cable.
  16. Loosen the 42-volt positive/negative battery cable bolt (1).
  17. Remove the red CPA retainer.
  18. Disconnect the 42-volt positive/negative battery cable.
    Fig 6: View Of 42-Volt Positive/Negative Battery Cable & Jumper Ground Wire Connector (5.3L Engine w/RPO HP2)
    GM1237049Courtesy of GENERAL MOTORS CORP.
  19. Disconnect the 42-volt jumper ground wire connector (2).
  20. Remove the SGCM rear bolt (2).
    Fig 7: View Of SGCM, Brace & Bolts
    GM1237056Courtesy of GENERAL MOTORS CORP.
  21. Remove the SGCM front bolt (3).
  22. Remove the brace (4).
  23. Remove the SGCM.
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