Pontiac Montana SV6 2007 Owner's Manual page 376

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 windshield wiper and washer
system 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.
376
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.