Owner's Manual
Page 355
...12,000 miles (20 000 km) of new vehicles damaged by this for ice and snow removal and dust control can fall upon and attack painted surfaces on your vehicle. Airborne pollutants can collect on the underbody. Dirt packed in the paint job causes this, GM will repair, at no... charge to the owner, the surfaces of purchase, whichever occurs first. 5-93 Underbody Maintenance Chemicals used for you. This damage can create a chemical fallout. Chemical Paint Spotting Some weather and atmospheric conditions ...
...12,000 miles (20 000 km) of new vehicles damaged by this for ice and snow removal and dust control can fall upon and attack painted surfaces on your vehicle. Airborne pollutants can collect on the underbody. Dirt packed in the paint job causes this, GM will repair, at no... charge to the owner, the surfaces of purchase, whichever occurs first. 5-93 Underbody Maintenance Chemicals used for you. This damage can create a chemical fallout. Chemical Paint Spotting Some weather and atmospheric conditions ...