2009 GMC Envoy Owner's Manual - Page 270

Hydroplaning Hydroplaning is dangerous. Water can build up under your vehicle's tires so they actually ride on the water. This can happen if the road is wet enough and you are going fast enough. When your vehicle is hydroplaning, it has little or no contact with the road. There is no hard and fast rule about hydroplaning. The best advice is to slow down when the road is wet. Before Leaving on a Long Trip To prepare your vehicle for a long trip, consider having it serviced by your dealer/retailer before departing. Things to check on your own include: • Windshield Washer Fluid: Reservoir full? Windows clean - inside and outside? • Wiper Blades: In good shape? • Fuel, Engine Oil, Other Fluids: All levels checked? • Lamps: Do they all work and are lenses clean? • Tires: Are treads good? Are tires inflated to recommended pressure? • Weather and Maps: Safe to travel? Have up-to-date maps? Other Rainy Weather Tips Besides slowing down, other wet weather driving tips include: Allow extra following distance. Pass with caution. Keep windshield wiping equipment in good shape. Keep the windshield washer fluid reservoir filled. Have good tires with proper tread depth. See Tires on page 5-53. Highway Hypnosis Always be alert and pay attention to your surroundings while driving. If you become tired or sleepy, find a safe place to park your vehicle and rest. Other driving tips include: • Keep the vehicle well ventilated. • Keep interior temperature cool. • Keep your eyes moving - scan the road ahead and to the sides. • Check the rearview mirror and vehicle instruments often. • Turn off cruise control. 4-26