GMC 2007 Sierra 1500 Pickup Owner's Manual page 524

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.
6. Check that the jumper cables do not 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 a remote positive
terminal (+) if the vehicle has one. Negative ( )
will go to a heavy, unpainted metal engine
part or a remote negative ( ) terminal if
the vehicle has one.
524
Do not connect positive (+) to negative ( ) or
you will get a short that would damage
the battery and maybe other parts too. And
do not connect the negative ( ) cable to
the negative ( ) terminal on the dead battery
because this can cause sparks.
On vehicles that have dual batteries, make all
battery connections to the remote positive (+)
and remote negative ( ) terminals.
7. Connect the red
positive (+) cable
to the positive (+)
terminal of the
vehicle with the
dead battery. Use a
remote positive (+)
terminal if the vehicle
has one.