Owner's Manual
Page 323
...or replacement, make sure the body repair shop applies anti-corrosion material to parts repaired or replaced to the owner, the surfaces of new vehicles damaged by this fallout condition within 12 months or 12,000 miles (20 000 km) of purchase, whichever occurs fi...surfaces on the underbody. Airborne pollutants can create a chemical fallout. Your dealer or an underbody car washing system can do this , GM will provide the corrosion protection while maintaining the warranty. Original manufacturer replacement parts will repair, at no charge to restore corrosion protection. Clean any...
...or replacement, make sure the body repair shop applies anti-corrosion material to parts repaired or replaced to the owner, the surfaces of new vehicles damaged by this fallout condition within 12 months or 12,000 miles (20 000 km) of purchase, whichever occurs fi...surfaces on the underbody. Airborne pollutants can create a chemical fallout. Your dealer or an underbody car washing system can do this , GM will provide the corrosion protection while maintaining the warranty. Original manufacturer replacement parts will repair, at no charge to restore corrosion protection. Clean any...