1998 Buick Regal Owner's Manual - Page 204

A CAUTION: Wet brakes can cause accidents. They won't work as well in a quick stop and may cause pulling to one side.You could lose control the vehicle. of After driving through a large puddle of water or a car wash, applyyour brake pedal lightlyuntil your brakes work normally. - Driving too fast through large water puddles or even going through some car washes can cause problems, too. The water may affect your brakes. Try to avoid puddles. But if you can't, try to slow down before you hit them.