Removal Procedure
Important: The roof panel is serviced as a complete assembly, including the outer
panel and the inner reinforcements. The roof panel is attached by a number
  of welds which must be drilled to remove the outer panel and inner reinforcements
 for servicing.
- Remove all related panels and components necessary to access the welds
attaching the roof assembly to the vehicle.
 
- Visually inspect and restore as much of the damage as possible.
 
- Remove sealers and anti-corrosion materials as necessary.
 
- Locate, mark, and drill out all factory welds. Note the number
and location of welds for installation of the service assembly.
 
Important: A second person may be needed to safely remove the roof assembly and
prevent damage to the vehicle.
- Remove the damaged roof panel assembly.
 
Installation Procedure
- Clean and prepare the
mating surfaces as necessary.
 
- Position the roof panel on the vehicle.
 
- Check fit and alignment.
 
- Correctly position the service assembly and plug weld accordingly.
 
- Clean and prepare all welded surfaces.
 
- Prime with 2-part catalyzed primer.
 
- Apply sealers and anti-corrosion materials as necessary.
 
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.
- Install all related panels and components.