1995 GMC Yukon Owner's Manual - Page 214

Hydroplaning doesn't happen often. But can if your tires haven't much it tread or if the pressure in one or more is low. It can happen a lotof water if is standing on the road. If you can see reflections from trees, telephone poles, orother vehicles, and raindrops "dimple" the water's surface, there could be hydroplaning. Hydroplaning usually happens at higher speeds. There justisn't a hard and fast rule about hydroplaning. The best advice is to slow down when it is raining. Some OtherRainy Weather Tips Turn on your low-beam headlights - not just your parking lights-to help make you more visible to others. 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. Have good tires with proper tread depth. (See "Tires" in the Index.) City Driving One of the biggest problems with city streets is the amount traffic on of them. You'll want towatch out for what the other drivers are doing and pay attention to traffic signals. Here areways to increase your safety in city driving: 0 Know the best way to get to where you are going. Get a city map and plan your trip into an unknown part of the city just as you would for a cross-country trip.