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Home >> Chevrolet >> 2014 >> Impala LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Hybrid/EV System Energy Storage) >> Repair Instructions >> Generator Control Module Replacement >> Removal Procedure
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Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    WARNING:

    Ensure all High Voltage safety procedures are followed. Failure to follow the procedure exactly as written may result in serious injury or death.

    WARNING:

    Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

    The High Voltage Disabling procedure includes the following steps:

    • Identify how to disable high voltage.
    • Identify how to test for the presence of high voltage.
    • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

    Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

    • Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
    • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
      • Visually and functionally inspect the gloves before use.
      • Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

    Failure to follow the procedures may result in serious injury or death.

  1. Ignition OFF, disable the high voltage at the A4 hybrid battery pack. Refer to High Voltage Disabling, for Servicing Internal Components within the A4 Hybrid/EV Battery Pack High Voltage Disabling .
    2. Fig 1: Generator Control Module Connector
    GM2596589Courtesy of GENERAL MOTORS COMPANY
  2. Disconnect the generator control module X4 connector (1).
    3. Fig 2: Drive Motor Battery Wire Junction Block Relay
    GM2680588Courtesy of GENERAL MOTORS COMPANY
  3. Remove the fasteners (1) securing the battery energy control module wiring junction block assembly (2), to the top of the generator control module.
  4. Remove the fasteners (3), securing the drive motor battery wire junction block relay assembly (4), to the top of the generator control module.
    5. Fig 3: High Voltage Bus Fasteners
    GM2701369Courtesy of GENERAL MOTORS COMPANY
  5. Remove the high voltage bus fasteners (1) from the drive motor battery wiring junction block relay assembly (2).
    6. Fig 4: Drive Motor Battery Wire Junction Block Relay
    GM2680586Courtesy of GENERAL MOTORS COMPANY
  6. Lift the drive motor battery wire junction block relay (2) and the battery energy control module wiring junction block (1) with the harness attached, and place on top of the battery energy control module (3).
    7. Fig 5: Generator Control Module
    GM2596567Courtesy of GENERAL MOTORS COMPANY
  7. Remove the generator control module mounting fasteners (1) and (2).
  8. Remove the generator control module (3) from the support tray.
    9. Fig 6: Drive Motor Battery Cooling Blower Outlet Duct Fastener
    GM2571127Courtesy of GENERAL MOTORS COMPANY
  9. Remove the generator control module cooling air outlet duct (2) from the generator control module. Refer to Drive Motor Battery Cooling Blower Outlet Duct Replacement (LUK) .
    10. Fig 7: Generator Control Module Cooling Air Outlet Duct And Tighten Fasteners
    GM2601904Courtesy of GENERAL MOTORS COMPANY
  10. Remove the generator control module cooling air outlet duct lower fasteners (1) and remove the generator control module cooling air outlet duct (2).
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