GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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

  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: 870895  Size: SH
  4. Remove all related panels and components.
  5. Repair as much of the damaged area as possible. Refer to Dimensions - Body .
  6. Remove the sealers and anti-corrosion materials from the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair .

  7. Object Number: 870890  Size: SH

    Important: Note the number and location of the factory welds for installation of the center floor panel.

    Important: Do NOT damage or drill through adjacent panels.

  8. Locate and drill out the #2 and #3 bar attachments to the inner rocker panel.
  9. Bend the upper weld flange up and away from the inner rocker panel.

  10. Object Number: 1313451  Size: SH
  11. Ensure that both front frame rails are removed (1). The center floor pan is removed through the bottom of the vehicle.

  12. Object Number: 870893  Size: SH
  13. Drill out all plug welds in the rear portion of the front rail connected to the center floor panel. If the rail portion is undamaged, keep the portion for reinstallation.
  14. Drill out all plug welds that attach the rear portion of the front rail to the intermediate portion of the front rail.

  15. Object Number: 870891  Size: SH

    Important: Remove the rear section of the rail before you remove the center floor panel.

  16. Using a 90 degree bent pry tool, pry the intermediate portion of the front rail apart from the rear portion of the rail far enough to allow the rear portion to slide free of the intermediate portion. Remove the rear portion of the front compartment rail.

  17. Object Number: 1313455  Size: SH
  18. Remove the foot well area (1) at the factory seams.

  19. Object Number: 870894  Size: SH
  20. Locate and drill out all of the spot welds that attach the center floor pan to the following components:
  21. • The dash and panel
    • The #1 bar area
    • The lower inner rockers
    • The rear floor pan
  22. Remove the center floor panel by lowering the rear edge first and pulling down and rearwards until the floor pan is free from the vehicle.

Installation Procedure


    Object Number: 870888  Size: SH

    Important: If the location of the original plug weld holes can not be determined, space the plug weld holes every 40 mm (1½ in) apart.

  1. Drill 8 mm (5/16 in) plug weld holes in the service part as necessary in the corresponding locations noted on the original panel.
  2. Prepare all mating surfaces as necessary.
  3. Apply 3M® Weld-Thru coating P/N 05916 or equivalent to all mating surfaces.

  4. Object Number: 870894  Size: SH
  5. Position the center floor panel to the vehicle using 3-dimensional measuring equipment. Clamp the panel in place.

  6. Object Number: 1313455  Size: SH
  7. Install the foot well area (1).

  8. Object Number: 1313451  Size: SH
  9. Install the front frame rails (1).

  10. Object Number: 870895  Size: SH
  11. Plug weld accordingly.
  12. Clean and prepare all of the welded surfaces.
  13. Install all of the related panels and components.
  14. Apply the sealers and anti-corrosion materials to the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair .
  15. Paint the repaired area. Refer to Basecoat/Clearcoat Paint Systems .
  16. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  17. Enable the SIR system. Refer to SIR Disabling and Enabling .