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

Caution: Refer to Glass and Sheet Metal Handling Caution in the Preface section.

Caution: Refer to Collision Sectioning Caution in the Preface section.

Caution: Refer to Sealing the Quarter Panel Caution in the Preface section.

Important: Sectioning of the rear pillar can only be performed with the outer quarter panel removed. Refer to Quarter Outer Panel Sectioning .

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. Remove all related panels and components.
4. Repair as much of the damage as possible to factory specifications. Refer to Dimensions - Body .

Caution: Refer to Foam Sound Deadeners Caution in the Preface section.

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 additional sectioning procedures, as necessary. Refer to the following procedures:

•	Outer Windshield Frame Pillar Sectioning

•	Front Hinge Pillar Sectioning

•	Rocker Outer Panel Sectioning

•	Center Pillar Sectioning





Important: Do not damage any inner panels or reinforcements.

7. Cut the panel in the locations where sectioning is to be performed.



8. Locate and drill out all factory welds. Note the number and location of the welds for installation of the service part.



9. Remove the damaged pillar section.

1. Cut the replacement body side in corresponding locations to fit the remaining original panel. The sectioning joint should be trimmed to allow a gap of 1½ times the metal thickness at the sectioning joint.



2. Create a 50 mm (2 in) (1) backing plate from the unused portion of the service part. Trim the backing plate as necessary to fit behind the sectioning joint where there is no reinforcement.



3. Drill 8 mm (5/16 in) plug weld holes along the sectioning cut on the remaining original part (2). Locate these holes approximately 13 mm (1/2 in) from the edge (1) and spaced 40 mm (1 ½ in) apart.




Important: If the location of the original plug weld holes cannot be determined, space the plug weld holes every 40 mm (1 1/2 in) apart.

4. 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.



5. Prepare all attachment surfaces, as necessary.
6. Apply GM-approved Weld-Thru Coating or equivalent to all mating surfaces. Refer to Anti-Corrosion Treatment and Repair .
7. Fit the backing plate (3) halfway into the sectioning joint, clamp and plug weld to the vehicle.



8. Position the rear pillar to the vehicle using 3-dimensional measuring equipment. Clamp in place.



9. Plug weld accordingly.

Important: To create a solid weld with minimum heat distortion, make 25 mm (1 in) stitch welds along the seam with 25 mm (1 in) gaps between them. Complete the stitch weld.

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