Chevrolet 2007 HH7 Owner's Manual page 257

Hydroplaning
Hydroplaning is dangerous. So much water can
build up under the tires that they can 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.
Hydroplaning does not happen often. But it can if
the tires do not have much tread or if the
pressure in one or more is low. It can happen if a
lot of water is standing on the road. If you can
see reflections from trees, telephone poles,
or other vehicles, and raindrops dimple the water's
surface, there could be hydroplaning.
Hydroplaning usually happens at higher speeds.
There just is not a hard and fast rule about
hydroplaning. The best advice is to slow down
when it is raining.
Driving Through Deep Standing Water
Notice: If you drive too quickly through deep
puddles or standing water, water can come in
through the engine's air intake and badly
damage the engine. Never drive through water
that is slightly lower than the underbody of your
vehicle. If you cannot avoid deep puddles or
standing water, drive through them very slowly.
Driving Through Flowing Water
CAUTION:
{
Flowing or rushing water creates strong
forces. If you try to drive through flowing
water, as you might at a low water
crossing, your vehicle can be carried away.
As little as six inches of flowing water can
carry away a smaller vehicle. If this
happens, you and other vehicle occupants
could drown. Do not ignore police warning
signs, and otherwise be very cautious
about trying to drive through flowing water.
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