GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 LaCrosse 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Underhood Electrical Center or Junction Block Replacement

Removal Procedure

    Object Number: 1233267 Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Lift the cover of the underhood junction block (2) to access the positive cable nut.
  3. Remove the positive battery cable nut and position the cable (1) away from the junction block.

    4. Object Number: 1233269 Size: SH
  4. Release the tabs and pull the junction block from the housing.

    5. Object Number: 1233270 Size: SH
  5. Loosen the bolts (1) retaining the engine, IP and forward lamp wiring harness connectors to the junction block.

    6. Object Number: 1233272 Size: SH
  6. Disconnect the wiring harness connectors from the junction block.

    7. Object Number: 1233274 Size: SH
  7. If the junction block housing removal is necessary, perform the following:
    8. 7.1. Remove the nuts (2) from the junction block housing (1).
    7.2. Lift the junction block housing to release the lower tab from the strut tower.
    7.3. Remove the junction block housing (1) from the vehicle.

Installation Procedure

    Object Number: 1233274 Size: SH
  1. If the junction block housing was removed, perform the following:
    2. 1.1. Position the junction block housing (1) to the strut tower and insert the lower tab into the slot on the tower.

    Notice: Refer to Fastener Notice in the Preface section.

    1.2. Install the junction block housing nuts (2) to the studs on the strut tower.

    Tighten
    Tighten the nuts to 3 N·m (27 lb in).


    Object Number: 1233272 Size: SH
  2. Connect the wiring harness connectors to the junction block.

    3. Object Number: 1233270 Size: SH
  3. Tighten the engine, IP and forward lamp wiring harness connector bolts to the junction block.

    4. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1233269 Size: SH
  4. Position the junction block to the housing. Align the tabs and press the junction block into place to secure the junction block.

    5. Object Number: 1233267 Size: SH
  5. Install the positive battery cable lead (1) to the stud on the junction block.

    6. Install the positive cable lead nut to the stud.

    Tighten
    Tighten the nut to 16 N·m (12 lb ft).

  6. Close the cover (2) on the junction block.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .