GMC Yukon Denali 2003 Owner's Manual page 344

Don't let the other end touch anything until the next
step. The other end of the negative (−) cable
doesn't go to the dead battery. It goes to a heavy,
unpainted metal engine part or to a remote
negative (−) terminal on the vehicle with the dead
battery.
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8. Now connect the black
negative (−) cable to
the negative (−)
terminal of the good
battery. Use a remote
negative (−) terminal
if the vehicle has
one. Your vehicle's
remote negative (−)
terminal is
marked GND.
The electrical connection is just as good there, and
the chance of sparks getting back to the battery
is much less.
10. Now start the vehicle with the good battery and run
the engine for awhile.
11. Try to start the vehicle that had the dead battery. If
it won't start after a few tries, it probably needs
service.
Notice: Damage to your vehicle may result from
electrical shorting if jumper cables are removed
incorrectly. To prevent electrical shorting, take care
that the cables don't touch each other or any
other metal. The repairs wouldn't be covered by
your warranty.
9. Connect the other end
of the negative (−)
cable at least 18 inches
(45 cm) away from
the dead battery, but
not near engine
parts that move.