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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 951 (Wiring Systems - Introduction) >> Repair Instructions >> Underhood Electrical Center or Junction Block Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the engine electrical center bracket assembly to the front fender.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the 4 retaining bolts (1).

    Tighten:  Tighten the 4 retaining bolts (1) to 9 N.m (80 lb in).

    3. Fig 1: Electrical Center Bracket Retaining Bolts
    GM747706Courtesy of GENERAL MOTORS CORP.
  3. Align the electrical center block (1) stubs in the slots so that the tabs (2) retains it in place.
    4. Fig 2: Installing Electrical Center From Housing
    GM749945Courtesy of GENERAL MOTORS CORP.
  4. Connect the wire connectors to the lower portion of the electrical center block.
  5. Connect the wire connectors with the bolts to the electrical center block.

    Tighten:  Tighten all connector bolts (1) to 9 N.m (80 lb in).

    6. Fig 3: Installing Electrical Center Connectors
    GM749942Courtesy of GENERAL MOTORS CORP.
  6. Ensure all wire connectors are securely connected.
  7. Set the electrical center block in its resting position till the tabs (3) locks in place.
  8. Install the lower part of the cover (1).
  9. With the cover (2) off, use the fuse location information to install all fuses and relays.
  10. Install the cover.
    11. Fig 4: Installing Electrical Center Brace Cover Assembly
    GM749941Courtesy of GENERAL MOTORS CORP.
  11. Install the fender upper brace.
    12. Fig 5: Installing Left Fender Upper Brace
    GM400853Courtesy of GENERAL MOTORS CORP.
  12. Install the 4 fender upper brace bolts.

    Tighten:  Tighten the 4 retaining bolts to 25 N.m (18 lb ft).

  13. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  14. Start vehicle and ensure all components function properly.
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