GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Approved Equipment for Collision Repair Caution in the Preface section.

Important: This panel is replaced at factory seams.

  1. Disable the SIR system. Refer to SIR Disabling and Enabling .
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .

  3. Object Number: 789109  Size: SH

    Caution: Sectioning should be performed only in the recommended areas. Failure to do so may compromise the structural integrity of the vehicle and cause personal injury if the vehicle is in a collision.

  4. Remove all related panels and components.
  5. Restore as much of the damage as possible .
  6. Remove the sealers and anti-corrosion materials from the repair area if necessary. Refer to Anti-Corrosion Treatment and Repair .

  7. Object Number: 789111  Size: SH

    Important: Note the number and location of the factory welds for installation of the rear end panel.

  8. Locate, mark, and drill out all the necessary factory welds.

  9. Object Number: 789112  Size: SH
  10. Remove the rear end panel.

Installation Procedure


    Object Number: 789114  Size: SH

    Important: If the location of the original plug weld holes can not be determined, or if structural weld-thru adhesive is present, space the plug weld holes every 40 mm (1.5 in).

  1. Drill 8 mm (5/16 in) plug weld holes on the service part as necessary in the locations noted from the original panels.
  2. Prepare all mating surfaces as necessary.
  3. Apply 3M Weld-Thru Coating P/N 05913 or equivalent to all mating surfaces.

  4. Object Number: 789112  Size: SH
  5. Position the rear end panel.

  6. Object Number: 789116  Size: SH
  7. Plug weld accordingly.
  8. Clean and prepare all welded surfaces.
  9. Install all the related panels and components.
  10. Apply the sealers and anti-corrosion materials to the repair area if necessary. Refer to Anti-Corrosion Treatment and Repair .
  11. Paint the repaired area. Refer to Basecoat/Clearcoat Paint Systems .
  12. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  13. Enable the SIR system. Refer to SIR Disabling and Enabling .