GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 350594  Size: SH
  1. Disconnect the tail/turn signal lamp wiring connectors (1) at the rear lamps bussing block at the rear of the vehicle.
  2. Remove the tail lamp assembly. Refer to Tail/Turn Signal Lamp Replacement in Lighting Systems.
  3. Open the fuel filler door.

  4. Object Number: 354587  Size: SH
  5. Remove the screws and the push-pin holding the fuel filler neck to the side panel. Refer to Fuel Tank Filler Door Replacement .
  6. Remove the end gate. Refer to Endgate Replacement .

  7. Object Number: 340587  Size: SH
  8. Remove the pickup box fasteners (1) from the frame rails.
  9. With the an assistant remove the box from the vehicle.

Installation Procedure

  1. Align the pickup box on the frame rails.

  2. Object Number: 340587  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.

  3. Loosely install the pickup box fasteners (1) to the frame rails.
  4. Tighten
    Tighten the retaining bolts to the frame rail to 85 N·m (63 lb ft).

  5. Install the end gate. Refer to Endgate Replacement .

  6. Object Number: 354587  Size: SH
  7. Fasten the screws and the push-pin around the fuel filler neck.
  8. Close the fuel filler door.
  9. Install the tail lamp assembly. Refer to Tail/Turn Signal Lamp Replacement in Lighting Systems.

  10. Object Number: 350594  Size: SH
  11. Connect the tail lamp wiring connectors (1) at the rear lamps bussing block, at the rear of the vehicle.