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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 >> Installation Procedure

Installation 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. Install the block base to the floor studs.
    2. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the block base retaining nuts to the floor studs.

    Tighten:  Tighten the block base retaining nuts to 10 N.m (88 lb in).

  3. Connect the console harness connector to the block base.
  4. Connect the headliner harness connector (2) to the block base.
    Fig 1: Identifying Body Wiring Harness & Headliner Harness Connector
    GM684293Courtesy of GENERAL MOTORS CORP.
  5. Connect the body wiring harness connector (1) to the block base.
  6. Connect the mobile telephone harness connector (1) to the junction block.
    Fig 2: Locating Mobile Telephone Harness Connector
    GM684303Courtesy of GENERAL MOTORS CORP.
  7. Connect the instrument panel harness connector (1) to the block base.
    Fig 3: View Of Instrument Panel Harness Connector
    GM684296Courtesy of GENERAL MOTORS CORP.
  8. Install the junction block to the block base.

    Ensure that the retaining tabs are fully seated.

    Fig 4: Junction Block Removed
    GM684301Courtesy of GENERAL MOTORS CORP.
  9. Install the 3 bolts (1) that retain the junction block to the block base.

    Tighten:  Tighten the 3 bolts to 3.5 N.m (31 lb in).

  10. Install the BCM to the rear electrical center. Refer to BODY CONTROL MODULE REPLACEMENT in Body Control System.
  11. Install the battery feed terminal nut (2) to the junction block.

    Tighten:  Tighten the battery feed terminal nut to 10 N.m (88 lb in).

    Fig 5: View Of Battery Feed Terminal Nut
    GM684302Courtesy of GENERAL MOTORS CORP.
  12. Install the rear electrical center cover.
    Fig 6: View Of Rear Electrical Center Cover
    GM683548Courtesy of GENERAL MOTORS CORP.
  13. If replacing the rear electrical center on a Chevrolet TrailBlazer, GMC Envoy or Oldsmobile Bravada, position the left second row seat to a passenger position.
  14. If replacing the rear electrical center on a Chevrolet TrailBlazer EXT or GMC Envoy XL, install the left second row seat. Refer to SEAT REPLACEMENT - REAR NO. 1 (TRAILBLAZER EXT, ENVOY XL) in Seats.
  15. Connect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Engine Electrical.
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