Owner's Manual
Page 300
..., at no defect in the paint job causes this for ice and snow removal and dust control can occur on the underbody parts such as fuel lines, frame, floor pan and exhaust system even though they have corrosion protection. Underbody Maintenance Chemicals used for you. 6-55 Your dealer or an underbody car... washing system can collect. If these materials from the underbody with touch-up materials available from your dealer or other debris can do this , Pontiac will corrode quickly and may develop into the paint surface.
..., at no defect in the paint job causes this for ice and snow removal and dust control can occur on the underbody parts such as fuel lines, frame, floor pan and exhaust system even though they have corrosion protection. Underbody Maintenance Chemicals used for you. 6-55 Your dealer or an underbody car... washing system can collect. If these materials from the underbody with touch-up materials available from your dealer or other debris can do this , Pontiac will corrode quickly and may develop into the paint surface.