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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 >> Underhood Electrical Center or Junction Block Replacement >> Removal Procedure

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.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE  in Engine Electrical.
  2. Press tabs (1) inward and lift to remove the junction block cover.
    Fig 1: Pressing Tabs Inward And Lifting To Remove Junction Block Cover
    G01640229Courtesy of GENERAL MOTORS CORP.
  3. Pull upward on the fuse relay center cover (1) to release the retaining tabs and remove the cover.
  4. Note the location and remove the harness end bolts (2) and remove the harness ends from the fuse relay center.
  5. Remove the fuse relay center bolts (3) and remove the fuse relay center from the junction block bracket.
  6. Pull downward on the wiring harness ends to remove from the bottom of the fuse relay center.
    Fig 2: Pulling Upward On Fuse Relay Center Cover To Release Retaining Tabs And Removing Cover
    G01640230Courtesy of GENERAL MOTORS CORP.
  7. Remove the junction block bracket retaining bolts (1) and remove the junction block bracket from the vehicle.
    Fig 3: Removing Junction Block Bracket Retaining Bolts And Removing Junction Block Bracket From Vehicle
    G01640231Courtesy of GENERAL MOTORS CORP.
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