Important: When replacing panels that involve serviceman stationary glass, refer to GM Service Bulletin 43-10-48 before performing any priming or refinishing.

Important: Sectioning should be performed only in the recommended areas. Failure to do so may compromise the structural integrity of the vehicle.

1. Visually inspect and restore as much of the damage as possible to the factory specifications.
2. Remove all related panels and components.
3. Remove the following as necessary:

•	The sealers

•	The sound deadeners

•	The anti-corrosion materials

4. Note the placement and number of foam baffles for new installation. If the baffles are damaged, replacement service parts are available.
5. Locate and mark all factory welds. Note the number and location of welds for installation of the service assembly.
6. Drill out all factory welds.
7. Determine sectioning locations.
8. Mark a line and cut in approved sectioning areas.
9. Remove the damaged panel.

1. Cut service part in corresponding locations to fit original cut lines. Leave a gap of one and one half times the metal thickness of sectioning joint (3).
2. Create 100 mm (4 in) backing plate (1) on rocker panel from unused portion of the service part.
3. Create a 50 mm (2 in) backing plate (2) on upper quarter panel from unused portion of the service part.
4. Position service part on vehicle. Check fit using body dimensions.
5. Take service part off to install GM  P/N 12399117 Sealing Strip between outer wheelhouse and gas door pocket.



6. Drill plug welds 25 mm (1 in) from seams and position backing plates in rocker and upper-quarter area.
7. Position the service part and clamp in place.
8. Drill 8 mm (5/16 in) plug weld holes as noted from original locations.



9. Stitch weld along entire sectioning joint. Make 25 mm (1 in) welds along the seam with 25 mm (1 in) gaps between them.
10. Go back and complete the stitch weld. This will create a solid joint with minimal heat distortion.
11. Grind and metal-finish welds as necessary.
12. Install the following:

•	The sealers

•	The sound deadeners

•	The anti-corrosion materials

•	The acoustic panels as noted from the original part

Important: Prior to refinishing, refer to GM 4901MD-99 Refinish Manual for recommended products. Do not combine paint systems. Refer to paint manufacturer's recommendations.

13. Apply two-part catalyzed primer.
14. Refinish as necessary.
15. Install all related panels and components.