1995 GMC Yukon Owner's Manual - Page 352

Finish Damage Any stone chips, fracturesor deep scratches in the finish should be repaired right away. Bare metal will corrode quickly and may develop into a major repair expense. Minor chips and scratches can be repaired with touch-up materials available from your dealer or otherservice outlets. Larger areas of finish damage can be corrected in your dealer's body and paint shop. Underbody Maintenance Chemicals used for ice and snow removal and dust control can collect on the underbody. If these are not removed, accelerated corrosion (rust) can occur on the underbody parts such as fuel lines, frame, tloor pan, and exhaust system even though they have corrosion protection. At least every spring, tlush these materials from the underbody with plain water. Clean any areas where mud and other debt-is can collect. Dirt packed i n closed areas of the frame should be loosened before being flushed. Your dealer or an underbody vehicle washing system can do this for you. Chemical Paint Spotting Some weather and atmospheric conditions can create a chemical fallout. Airborne pollutants can f a l l upon and attack painted surfaces on your vehicle. This darnage can take two forms: blotchy, ringlet-shaped discolorations, and small irregular dark spots etched into the paint surface. Although no defect i n the paint job causes this, GM will repair, at no charge to the owner, the surfaces of new vehicles damaged by this fallout condition within 12 months or 12.000 miles (20 000 k m ) of purchase, whichever comes first. 6-70