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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1582 (Body Control System) >> Repair Instructions >> Body Control Module Replacement >> Removal Procedure
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Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • The ignition switch should be in the OFF position when connecting or disconnecting the connectors to the body control module (BCM).
  • Always disconnect the 40-way body wiring extension FIRST, the 32-way tan connector SECOND and the 24-way gray electrical connector LAST.
  • Always connect the 24-way gray electrical connector FIRST, the 32-way tan connector SECOND and the 40-way body wiring extension LAST.
  • The BCM can set DTCs with the ignition switch in the OFF position. The BCM has battery run down protection for the courtesy lamp circuit. The BCM battery run down protection cannot detect shorts on inputs or other circuits which the BCM does not control. Use the scan tool in order to activate the POWER DOWN NOW mode. Use the POWER DOWN NOW mode in order to check for current draws on circuits that are not controlled by the BCM, or controlled by the battery run down protection system.
  • Do not touch the exposed electrical contacts of the body wiring extension. Do not open the BCM housing. The module does not have any serviceable components. The module may be replaced only as an assembly.
CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE  in Engine Electrical.
  2. If replacing the BCM on a Chevrolet TrailBlazer EXT or GMC Envoy XL, remove the left second row seat. Refer to SEAT SYSTEM  in Seats.
  3. If replacing the BCM on a Chevrolet TrailBlazer, GMC Envoy or Oldsmobile Bravada, position the left hand second seat to a cargo position.
  4. Remove the rear electrical center cover.
    Fig 1: Removing Rear Electrical Center Cover
    G01640786Courtesy of GENERAL MOTORS CORP.
  5. Press down and hold the locking tab (1).
  6. Disengage the sliding latch retaining the BCM to the rear electrical center.

    Slide the latch inboard until fully extended, approximately 40 mm (1.6 in).

    Fig 2: Identifying Locking Tab
    G01640787Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the 40-way body wiring extension (1) from the BCM.
    Fig 3: Disconnecting 40-Way Body Wiring Extension From BCM
    G01640788Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the 32-way tan electrical connector (2) from the BCM.
  9. Disconnect the 24-way gray electrical connector (1) from the BCM.
    Fig 4: Disconnecting 24-Way Gray Electrical Connector From BCM
    G01640789Courtesy of GENERAL MOTORS CORP.
  10. With an upward motion, remove the BCM (1) from the rear electrical center.
    Fig 5: Removing BCM From Rear Electrical Center
    G01640790Courtesy of GENERAL MOTORS CORP.
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