GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2003 🢒 Aurora 🢒 Engine 🢒 Engine Electrical 🢒 Underhood Electrical Center or Junction Block Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the cover from the underhood fuse block.

    3. Object Number: 443867 Size: SH
  3. Disconnect the positive battery cables fastener (1) from the underhood fuse block.
  4. Disconnect the wiring harness clip from the accumulator cover and position the cables out of the way.

    5. Object Number: 419283 Size: SH
  5. Disconnect the retaining clip securing the evaporator hose to the accumulator cover.
  6. Carefully position the evaporator hose out of the way.

    7. Object Number: 419284 Size: SH
  7. Remove the accumulator cover.

    8. Object Number: 471509 Size: SH
  8. Loosen the fasteners retaining the underhood fuse block connectors.
  9. Disconnect the 4 cam lock connectors from the underhood fuse block and lift the assembly up from the base.

    10. Object Number: 471511 Size: SH
  10. Disconnect the engine harness connector and remove the underhood fuse block from the vehicle.

    11. Object Number: 471508 Size: SH
  11. Remove the underhood fuse block base fasteners.
  12. Remove the underhood fuse block base assembly.

Installation Procedure
  1. Install the underhood fuse block base into the vehicle.

    2. Object Number: 471508 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the underhood fuse block fasteners.

    3. Tighten
    Tighten the fasteners to 9 N·m (80 lb in).


    Object Number: 471511 Size: SH
  3. Connect the engine harness connector to the underhood fuse block.

    4. Object Number: 471509 Size: SH
  4. Connect the underhood fuse block connectors and tighten the 3 retaining bolts.

    5. Tighten
    Tighten the fasteners to 6.6 N·m (58 lb in).

  5. Install the underhood fuse block by pressing it into the 4 retaining locks until an audible click is heard.

    6. Object Number: 419284 Size: SH
  6. Install the accumulator cover.
  7. Install the wiring harness into the clip in the accumulator cover.
  8. Position the positive cables onto the stud.

    9. Object Number: 443867 Size: SH
  9. Install the positive battery cable fastener (1) to the underhood fuse block.

    10. Tighten
    Tighten the fastener to 15 N·m (11 lb ft).

  10. Install the cover onto the underhood fuse block.

    11. Object Number: 419283 Size: SH
  11. Reposition the evaporator hose to the accumulator cover.
  12. Close the retaining clip in order to secure the evaporator hose to the accumulator cover.
  13. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.