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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1572 (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 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.
  1. Install the block base to the floor studs.
    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.
  5. Connect the body wiring harness connector (1) to the block base.
    Fig 1: Connecting Body Wiring Harness Connector And Headliner Harness Connector To Junction Block
    G01640240Courtesy of GENERAL MOTORS CORP.
  6. Connect the mobile telephone harness connector (1) to the junction block.
    Fig 2: Connecting Mobile Telephone Harness Connector To Junction Block
    G01640241Courtesy of GENERAL MOTORS CORP.
  7. Connect the instrument panel harness connector (1) to the block base.
    Fig 3: Connecting Instrument Panel Harness Connector To Block Base
    G01640242Courtesy of GENERAL MOTORS CORP.
  8. Install the junction block to the block base.

    Ensure that the retaining tabs are fully seated.

    Fig 4: Installing Junction Block To Block Base
    G01640243Courtesy 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: Installing Battery Feed Terminal Nut To Junction Block
    G01640244Courtesy of GENERAL MOTORS CORP.
  12. Install the rear electrical center cover.
  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 SYSTEM  in Seats.
  15. Connect the battery negative cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE  in Engine Electrical.
    Fig 6: Installing Rear Electrical Center Cover
    G01640245Courtesy of GENERAL MOTORS CORP.
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