GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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


    Object Number: 1902179  Size: SH
  1. Disable the supplemental inflatable restraint (SIR) System. Refer to SIR Disabling and Enabling .
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Remove all related panels and components.
  4. Repair as much of the damage as possible to factory specifications. Refer to Dimensions - Body .
  5. Note the location and remove the sealers and anti-corrosion materials from the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair .
  6. Important: Do not damage any inner panels or reinforcements.


    Object Number: 1902177  Size: SH
  7. Locate and drill out all factory welds. Note the number and location of the welds for installation of the rear rail.

  8. Object Number: 1902176  Size: SH
  9. Remove the damaged rear rail.

Installation Procedure

    Important: 

       • If the location of the original plug weld holes cannot be determined, space the plug weld holes every 40 mm (1½ in) apart.
       • Some panels may have structural weld-thru adhesive. It is necessary to replace the weld-thru adhesive with an additional spot weld between each factory spot weld.


    Object Number: 1902174  Size: SH
  1. Drill 8 mm (5/16 in) plug weld holes in the service part as necessary in the locations noted from the original panel.
  2. Prepare all mating surfaces as necessary.
  3. Apply GM-approved Weld-Thru Coating or equivalent to all mating surfaces. Refer to Anti-Corrosion Treatment and Repair .

  4. Object Number: 1902172  Size: SH
  5. Position the rear rail lower to the vehicle using 3-dimensional measuring equipment. Clamp the rear rail lower into place.

  6. Object Number: 1902171  Size: SH
  7. Plug weld accordingly.
  8. Clean and prepare all welded surfaces.
  9. Apply the sealers and anti-corrosion materials to the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair .
  10. Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems .
  11. Install all related panels and components.
  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 .