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Removal Procedure

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. Disable the high voltage system. Refer to High Voltage Disabling .
  2. Remove the high voltage disconnect circuit cover. Refer to High Voltage Disconnect Circuit Connector Cover Replacement .
  3. Remove the high voltage battery disconnect control module. Refer to High Voltage Battery Disconnect Control Module Module Replacement (with quick charge) , High Voltage Battery Disconnect Control Module Module Replacement (without quick charge) .
  4. Remove the drive motor generator power inverter module. Refer to Drive Motor Generator Power Inverter Module Replacement .
  5. Remove the generator control module coolant hose at the front of the APM module. Refer to Generator Control Module Coolant Hose Replacement (PE From APM TO TPIM) .
    6. Fig 1: Engine Harness Connector And Accessory DC Power Control (APM) Module
    GM3239594Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the engine harness connector (1) from the accessory DC power control (APM) module (2).
    7. Fig 2: APM Ground Cable Fastener
    GM3232234Courtesy of GENERAL MOTORS COMPANY
  7. Remove the APM ground cable fastener (2) and remove the APM ground cable (1), from the APM module.
    8. Fig 3: APM Cable Connector
    GM3232231Courtesy of GENERAL MOTORS COMPANY
  8. Disconnect the APM cable connector (1) on the right side of the APM module (2).
  9. Remove the drive motor generator control module cooling outlet hose (Straight Hose) at the rear of the APM module. Refer to Drive Motor Generator Control Module Cooling Outlet Hose Replacement (Auxiliary Radiator to Drive Motor Battery Charger) , Drive Motor Generator Control Module Cooling Outlet Hose Replacement (Long Hose) , Drive Motor Generator Control Module Cooling Outlet Hose Replacement (Two Bending) , Drive Motor Generator Control Module Cooling Outlet Hose Replacement (Straight Hose) .
    10. Fig 4: Battery Positive Cable Cover
    GM2917960Courtesy of GENERAL MOTORS COMPANY
  10. Remove the battery positive cable cover (1) and remove the battery positive cable fastener (2) from the left front side of the APM module (4).
  11. Remove the battery positive cable (3) from the APM module.
    12. Fig 5: APM Module Retainer Tray Fasteners
    GM3232233Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Note the orientation of the retainer tray brackets.

  12. Remove the APM module retainer tray fasteners (1) and remove the retainer tray brackets (2).
    13. Fig 6: APM Module And Retainer Clip
    GM3232228Courtesy of GENERAL MOTORS COMPANY
  13. Unclip the APM module (4) from the retainer clip (1) and remove the APM module from the vehicle.
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