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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1473 (Wiring Systems (General Information)) >> Repair Instructions >> Rear Electrical Center or Junction Block Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable.
  2. If replacing the rear electrical center on a Chevrolet TrailBlazer EXT or GMC Envoy XL, remove the left second row seat. Refer to SEAT REPLACEMENT - REAR NO. 1 (TRAILBLAZER EXT, ENVOY XL) in Seats.
  3. If replacing the rear electrical center on a Chevrolet TrailbBlazer, GMC Envoy or Oldsmobile Bravada, position the left second row seat to a cargo position.
    Fig 1: View Of Rear Electrical Center Cover
    GM683548Courtesy of GENERAL MOTORS CORP.
  4. Remove the rear electrical center cover.
  5. Remove the battery feed terminal nut (2) from the junction block.
    6. Fig 2: View Of Battery Feed Terminal Nut
    GM684302Courtesy of GENERAL MOTORS CORP.
  6. Remove the body control module (BCM) from the rear electrical center. Refer to BODY CONTROL MODULE REPLACEMENT in Body Control System.
  7. Fully loosen the 3 bolts (1) that retain the junction block to the electrical connectors.
  8. Release the tabs that retain the junction block to the block base.
  9. Remove the junction block from the block base.
    Fig 3: Junction Block Removed
    GM684301Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the instrument panel harness connector (1) from the junction block.
    Fig 4: View Of Instrument Panel Harness Connector
    GM684296Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the mobile telephone harness connector (1) from the junction block.
    Fig 5: Locating Mobile Telephone Harness Connector
    GM684303Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the body wiring harness connector (1) from the junction block.
  13. Disconnect the headliner harness connector (2) from the junction block.
    Fig 6: Identifying Body Wiring Harness & Headliner Harness Connector
    GM684293Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the console harness connector from the junction block.
  15. Remove the block base retaining nuts from the floor studs.
  16. Remove the block base from the floor panel.
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