Owner's Manual
Page 302
...these are not removed, the accelerated corrosion (rust) can collect on underbody parts such as fuel lines, frame, floor pan and exhaust system even though they have corrosion protection. Dirt packed in... the finish should be loosened before being flushed. Minor chips and scratches can be repaired with plain water. these materials from the underbody with touch-up materials available from your... occur on the underbody. Your dealer or an underbody car washing system cando this , Buick job to will corrode quickly and maydevelop into the paint surface. Chemical Paint Spotting Some...
...these are not removed, the accelerated corrosion (rust) can collect on underbody parts such as fuel lines, frame, floor pan and exhaust system even though they have corrosion protection. Dirt packed in... the finish should be loosened before being flushed. Minor chips and scratches can be repaired with plain water. these materials from the underbody with touch-up materials available from your... occur on the underbody. Your dealer or an underbody car washing system cando this , Buick job to will corrode quickly and maydevelop into the paint surface. Chemical Paint Spotting Some...