1997 Chevrolet Suburban Owner's Manual - Page 338

Tires To clean your tires, use a stiff brush with a tire cleaner. L Underbody Maintenance Chemicals used for ice and snow removal anddust 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, floor pan and exhaust system even though they have corrosion protection. At least every spring, flush these materials from the underbody with plain water. Clean any areas where mud and other debris can collect. Dirt packed in closed areas of the frame should be loosened before being flushed. Your dealer or an underbody car washing system can do this for you. NOTICE: When applying a tire dressing always take care to wipe off any oversprayor splash fromall painted surfaces on the body or wheels of the vehicle. Petroleum-based products may damage the paint fidish. Sheet Metal Damage If your vehicle is damaged and requires sheet metal repair or replacement, make sure the body repair shop applies anti-corrosion material to the parts repaired or replaced to restore corrosion protection. Chemical Paint Spotting Some weather and atmospheric conditionscan create a chemical fallout. Airborne pollutantscan fall upon and This damage can attack painted surfaces on your vehicle. take two forms: blotchy, ringlet-shaped discolorations, and small irregular dark spots etched into the paint surface. Although no defect in 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 km) of purchase, whichever occurs first. Finish Damage Any stone chips, fractures or 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 other service outlets. Larger areas of finish damage can be corrected in your dealer's body and paint shop. 6-59