1995 GMC Sonoma Owner's Manual - Page 160

Hydroplaning Hydroplaning is dangerous. So much water canbuild up under your tires that they can actually ride onthe water. This can happen if the road is wet enough and you're going fast enough. When your vehicle is hydroplaning, it has little or no contact with the road. Hydroplaning doesn't happen often. But it can if your tireshaven't much tread or if the pressure in one or more is low. It can happen if a lotof water is standing on road. If you can see reflections from trees, telephone the poles, or other vehicles, and raindrops "dimple" the water's surface, there could behydroplaning. Hydroplaning usually happens athigher speeds. There just isn't a hard and fast . rule about hydroplaning. The best advice is to slow down when it is . raining. Some Other Rainy Weather Tips Turn on yourlow-beam headlights - not just your parking lights to help make you more visible to others. Besides slowing down,allow some extra followingdistance. And be especially carefulwhen you pass another vehicle. Allow yourself more clear roomahead, and be prepared to have your view restricted by road spray. Have good tires with propertread depth. (See "Tires'' in the Index.) 4-26