GMC 1996 Sonoma Owner's Manual page 158

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.
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's wise to keep your wiping equipment in good shape
and keep your windshield washer tank filled. 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.
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 can't, try to slow down before you hit them.
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