1999 Pontiac Grand Prix Owner's Manual - Page 203
1999 Pontiac Grand Prix Manual
Page 203 highlights
yellowblue Driving Through Deep Standing Water City Driving NOTICE: If you drive too quickly through deep puddles or standing water, water can come in through your engine's air intake and badly damage your engine. Never drive through water that is slightly lower than the underbody of your vehicle. If you can't avoid deep puddles or standing water, drive through them very slowly. Some Other Rainy Weather Tips D Besides slowing down, allow some extra following distance. And be especially careful when you pass another vehicle. Allow yourself more clear room ahead, and be prepared to have your view restricted by road spray. (See "Tires" in the Index.) D Have good tires with proper tread depth. One of the biggest problems with city streets is the amount of traffic on them. You'll want to watch out for what the other drivers are doing and pay attention to traffic signals. 4-21