1998 Pontiac Grand Prix Owner's Manual - Page 334

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) occur on can the underbody parts such fuel lines, frame, floor as 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. r packed in closed areas Dt i of the frame should be loosened before being flushed. Your dealer oran underbody car washing system can do this for you. Chemical Paint Spotting Some weather and atmospheric conditions can create a chemical fallout. Airborne pollutants can upon fall and attack painted surfaces on your vehicle. This damage can take two forms: blotchy, ringlet-shaped discolorations, and small irregular dark spots etched into the paint surface. Although no defect in the paint causes this, Pontiac job will repair, atno charge to the owner, the surfaces of new vehicles damagedby this fallout conditionwithin 12 months or 12,000 miles (20 OOO km) of purchase, whichever occursfirst. 6-59