GMC 2013 Sierra Denali Owner's Manual page 390

negative ( ) cable to the
negative ( ) terminal on the dead
battery because this can cause
sparks.
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.
8. Do not let the other end touch
metal. Connect it to the
positive (+) terminal of the good
battery. Use a remote
positive (+) terminal if the vehicle
has one.
9. Connect the black negative ( )
cable to the negative ( ) terminal
of the good battery. Use a
remote negative ( ) terminal if
the vehicle has one.
Do not let the other end touch
anything until the next step. The
other end of the negative ( )
cable does not go to the dead
battery. It goes to a heavy,
unpainted metal engine part or
to the remote negative ( )
terminal on the vehicle with the
dead battery.
10. Connect the other end of the
negative ( ) cable to the
remote negative ( ) terminal on
the vehicle with the dead
battery.
11. Start the vehicle with the good
battery and run the engine for a
while.
12. Try to start the vehicle that had
the dead battery. If it will not
start after a few tries, it
probably needs service.