1996 Buick Century Owner's Manual

Underbody MaintenanceChemicals used for ice and snow removal and dustcontrol can collect on the underbody. If these are notremoved, accelerated corrosion (rust) can occur onthe underbody parts such as fuel lines, frame, floorpan and exhaust system even though they have,corrosion protection.At least every spring, flush these materials from theunderbody with plain water. Clean any areas where mudand other debris can collect. Dirt packed in closed areasof the fi-ame should be loosened before being flushed.Your dealer or an underbody vehicle washing systemcan do this for you.Chemical Paint SDottingSome weather and atmospneric conditions can create a Ichemical fallout. Airborne pollutants can fall upon andattack painted surfaces on your vehicle. This damagecan take two forms: blotchy, ringlet-shapeddiscolorations, and small irregular dark spots etched intothe paint surface.Although no defect in the paint job causes this, Buickwill repair, at no charge to the owner, the. surfaces ofnew vehicles damaged by this fallout condition within12 months or 12,000 ,miles(20 000 km) of purchase,whichever occurs first.6-53