GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 679806  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove all related panels and components.
  3. Caution: Refer to Foam Sound Deadeners Caution in the Preface section.

  4. Restore as much of the damage as possible to factory specifications.
  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. Perform the necessary procedures to gain access to the repair.

  7. Object Number: 679809  Size: SH

    Important: Do not damage any inner panels or reinforcements.

  8. Locate and drill out all factory welds. Note the number and location of welds for installation of the front upper rail.
  9. Remove the damaged front upper rail.

Installation Procedure


    Object Number: 679815  Size: SH

    Important: In any area damaged beyond recognition, space plug weld holes every 40 mm (1 in) apart.

  1. Drill 8 mm (5/16 in) plug weld holes as necessary in locations noted from the original front upper rail.
  2. Prepare all attachment surfaces as necessary.

  3. Object Number: 679817  Size: SH
  4. Position the upper rail.

  5. Object Number: 679821  Size: SH
  6. Plug weld accordingly.
  7. Clean and prepare all welded surfaces.
  8. Complete the necessary procedures.
  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 .