Chevrolet 2004 Express Van Owner's Manual page 296

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.
Don't connect positive (+) to negative ( ) or you will
get a short that would damage the battery and
maybe other parts, too. And don't connect
the negative ( ) cable to the negative ( ) terminal
on the dead battery because this can cause sparks.
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6. Connect the red positive (+) cable to the positive (+)
terminal of the dead battery. Use a remote
positive (+) terminal if the vehicle has one.