GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 TrailBlazer - 4WD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Underhood Electrical Center or Junction Block Replacement

Removal Procedure

    Object Number: 882139 Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Press tabs (1) inward and lift to remove the junction block cover.

    3. Object Number: 882142 Size: SH
  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.

    7. Object Number: 882144 Size: SH
  7. Remove the junction block bracket retaining bolts (1) and remove the junction block bracket from the vehicle.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 882144 Size: SH
  1. Position the junction block bracket and install the bolts (1).

    2. Tighten
    Tighten the junction block bracket bolts to 6 N·m (53 lb in).

  2. Align the wiring harnesses and install the fuse relay center.

    3. Object Number: 882142 Size: SH
  3. Install the fuse relay center bolts (3).

    4. Tighten
    Tighten the relay center bolts to 6 N·m (53 lb in).

  4. Install the harness end bolts (2).
  5. Install the fuse relay center cover (1) over the relay center bolts. Press downward to engage the tabs.
  6. Install the junction block cover. Press downward to engage the tabs.