GMC 2010 Yukon/Yukon XL Owner's Manual page 387

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.
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 6 63.
Turn off cruise control.
To prepare your vehicle for a long trip, consider having
it serviced by your dealer 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?
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