Driving Through Flowing Water; Some Other Rainy Weather Tips; Driving Through Deep Standing Water - GMC 2003 GMT560 T-Series Owner's Manual

Hydroplaning
Hydroplaning is dangerous. So much water can build up
under your tires that they can actually ride on the
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 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 isn't 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 your engine's air intake and badly damage
your engine. Never drive through water that is
slightly lower than the underbody of your vehicle. If
you can't avoid deep puddles or standing water,
drive through them very slowly.
4-20

Driving Through Flowing Water

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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. Don't ignore police
warning signs, and otherwise be very cautious
about trying to drive through flowing water.

Some Other Rainy Weather Tips

•
Turn on your low-beam headlamps and your marker
and clearance lamps, if your vehicle has them — not
just your parking lamps — 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
on page 5-48 .