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Home › Chevrolet › 2004 › Impala LS › Repair and Diagnosis › External Pages › Different car › Section 871 (Hybrid Energy Storage System) › Repair Instructions › Generator Battery Disconnect Control Module Replacement › Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: To help avoid personal injury, be careful when working in the vicinity of the generator battery disconnect control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.
    Fig 1: View Of Negative Battery Cable Lead
    GM1892883Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the hybrid battery. Refer to Hybrid Battery Service Disconnect/Connect .
  2. Remove the plastic nut (2) from the generator battery disconnect control module negative stud.
  3. Remove the 36-volt negative battery cable lead (1) from the generator battery disconnect control module negative stud.
    4. Fig 2: Identifying Generator Battery Fuse
    GM1892885Courtesy of GENERAL MOTORS CORP.
  4. Remove the generator battery fuse (1) from the generator battery disconnect module negative stud.
    5. Fig 3: Locating 36-Volt Positive Battery Cable Nuts
    GM1892886Courtesy of GENERAL MOTORS CORP.
  5. Remove and discard the 36-volt positive battery cable lead nut (3).
  6. Remove the 36-volt positive battery cable lead nut (1).
  7. Remove the 36-volt positive battery cable leads (2).
  8. Secure the cables out of the way, ensuring that the cables CANNOT be re-installed without your knowledge.
    9. Fig 4: Locating Body Wiring Harness Electrical Connector
    GM1892879Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the body wiring harness electrical connector (1) from the generator battery disconnect control module pigtail.
    10. Fig 5: Identifying Generator Battery Vent Fan & Cover Bolts
    GM1892888Courtesy of GENERAL MOTORS CORP.
  10. Remove the 2 generator battery vent fan cover bolts (2).
  11. Remove the 12 generator battery cover bolts (1).
    12. Fig 6: Identifying Generator Battery Cover
    GM1892893Courtesy of GENERAL MOTORS CORP.
  12. Remove the generator battery cover (1).
    13. Fig 7: Identifying Generator Battery Cable Leads
    GM1892895Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Removing the interconnect cables will disable the 36 volts within the generator battery control module.
  13. Remove the generator battery terminal covers.
  14. Remove the generator battery cable nuts.
  15. Remove the generator battery cable leads (1, 2, and 3) from the batteries.
  16. Remove the 2 small temperature sensor wiring harness terminal leads located under the battery cable leads from the batteries.
    17. Fig 8: Identifying Battery Cables & Nuts
    GM1831950Courtesy of GENERAL MOTORS CORP.
  17. Remove the generator battery control module nut (4), and the battery cable (3) from the stud.
  18. Remove the generator battery control module nut (8), and the battery cable (7) from the stud.
    19. Fig 9: Identifying Generator Battery Temperature Sensor Wiring Harness Electrical Connectors
    GM1831951Courtesy of GENERAL MOTORS CORP.
  19. Disconnect the wiring harness electrical connector (1) from the vent fan electrical connector.
  20. Disconnect the generator battery temperature sensor wiring harness electrical connectors (2, 5) from the generator control module.
  21. Reposition the battery cables and the generator battery temperature sensor wiring harness out of the way.
    22. Fig 10: View Of Battery Disconnect Control Module & Pigtail
    GM1892896Courtesy of GENERAL MOTORS CORP.
  22. Remove the generator battery disconnect control module pigtail (2) clip from the side of the battery carrier.
  23. Unclip the fan harness retainer from the battery.
  24. Remove the 4 generator battery disconnect control module bolts.
  25. Remove the generator battery disconnect control module (1).
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