Chevrolet 2007 Silverado 1500 Pickup Owner's Manual page 387

It is always wise to go slower and be cautious if rain
starts to fall while you are driving. The surface may
get wet suddenly when your reflexes are tuned for
driving on dry pavement. If your vehicle has
four-wheel drive, see Four-Wheel Drive on
page 153 for transfer case mode selection.
The heavier the rain, the harder it is to see.
Even if your windshield wiper blades are in good
shape, a heavy rain can make it harder to see
road signs and traffic signals, pavement markings,
the edge of the road, and even people walking.
It is wise to keep your wiping equipment in
good shape and keep your windshield washer
fluid reservoir filled with washer fluid. Replace your
windshield wiper inserts when they show signs
of streaking or missing areas on the windshield,
or when strips of rubber start to separate from
the inserts.
CAUTION:
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Wet brakes can cause accidents. They
may not work as well in a quick stop and
may cause pulling to one side. You could
lose control of the vehicle.
After driving through a large puddle of
water or a car wash, apply your brake pedal
lightly until your brakes work normally.
Driving too fast through large water puddles or
even going through some car washes can cause
problems, too. The water may affect your brakes.
Try to avoid puddles. But if you cannot, try to slow
down before you hit them.
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