Chevrolet 2004 Impala Owner's Manual page 311

CAUTION:
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An electric fan can start up even when the
engine is not running and can injure you. Keep
hands, clothing and tools away from any
underhood electric fan.
CAUTION:
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Using a match near a battery can cause battery
gas to explode. People have been hurt doing
this, and some have been blinded. Use a
flashlight if you need more light.
Be sure the battery has enough water. You do
not need to add water to the ACDelco
installed in your new vehicle. But if a battery
has filler caps, be sure the right amount of
fluid is there. If it is low, add water to take care
of that first. If you do not, explosive gas could
be present.
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battery
CAUTION: (Continued)
CAUTION: (Continued)
Battery fluid contains acid that can burn you.
Do not get it on you. If you accidentally get it
in your eyes or on your skin, flush the place
with water and get medical help immediately.
CAUTION:
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Fans or other moving engine parts can injure
you badly. Keep your hands away from moving
parts once the engine is running.
5. Check that the jumper cables don't have loose or
missing insulation. If they do, you could get a
shock. The vehicles could be damaged, too.
Before you connect the cables, here are some
basic things you should know. Positive (+) will go to
positive (+) or to a remote positive (+) terminal if
the vehicle has one. Negative ( ) will go to a heavy,
unpainted metal engine part or to a remote
negative ( ) terminal if the vehicle has one.
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