For 1990-2009 cars

### Removal Procedure

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

Important: When replacing panels that involve servicing of stationary windows, refer to Adhesive Installation of Stationary Windows , before performing any priming or refinishing.

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 .
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. Remove the windshield. Refer to Windshield Replacement .
7. Remove the rear window. Refer to Rear Window Replacement .
8. Locate and drill out all factory welds. Note the number and location of welds for installation of the roof panel.
9. With an assistant remove the roof panel.

### Installation Procedure

1. Drill 8 mm (5/16 in) plug weld holes, as necessary, in locations noted from the original panel.

Important: If the location of the original plug weld holes can not be determined, or if structural weld-thru adhesive is present, space the plug weld holes every 40 mm (1½ in) apart.

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. With the aid of an assistant, position the roof panel to the body.
5. Plug weld accordingly.
6. Clean and prepare all welded surfaces.
7. Apply the sealers and anti-corrosion materials to the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair .
8. Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems .
9. Install the windshield. Refer to Windshield Replacement .
10. Install the rear window. Refer to Rear Window Replacement .
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 .