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: 931577  Size: SH
  1. Disable the SIR system. Refer to SIR Disabling and Enabling in SIR.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  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 in Paint and Coatings.
  6. Important: Do not damage any inner panels or reinforcements.

  7. Cut the panel along the front edge of the die mark.
  8. Locate and drill out all factory welds. Note the number and location of welds for installation of the front lower inner rail section.
  9. Remove the damaged front lower inner rail.

Installation Procedure


    Object Number: 931585  Size: SH
  1. Cut the replacement service part along the back edge of the arrow on the die mark.
  2. Important: If the location of the original plug weld holes can not be determined, space the plug weld holes every 40 mm (1 1/2 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.

  3. Drill 8 mm (5/16 in) plug weld holes in the service part as necessary in the locations noted from the original panel and along the sectioning cut.
  4. Prepare all mating surfaces as necessary.
  5. Apply 3M Weld-Thru Coating P/N 05916 or equivalent to all mating surfaces.
  6. Slide the replacement service part behind the original panel at the sectioning joint.
  7. Position the front lower inner rail to the vehicle using 3-dimensional measuring equipment. Clamp the front lower inner rail into place.

  8. Object Number: 931595  Size: SH
  9. Plug weld accordingly.
  10. To create a solid weld with minimum heat distortion at the sectioning joint, make 25 mm (1 in) welds with 25 mm (1 in) gaps between them. Then go back and complete the stitch weld.
  11. Clean and prepare all welded surfaces.
  12. Apply the sealers and anti-corrosion materials to the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair in Paint and Coatings.
  13. Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems in Paint and Coatings.
  14. Install all related panels and components.
  15. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  16. Enable the SIR system. Refer to SIR Disabling and Enabling in SIR.