GMC 2014 Sierra Denali 3500HD Owner's Manual page 393

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.
A. Heavy, Unpainted Metal Engine
Part or Remote Negative ( )
Terminal
B. Good Battery or Remote
Positive (+) and Remote
Negative ( ) Terminals
C. Dead Battery or Remote
Positive (+) Terminal
To disconnect the jumper cables
from both vehicles:
1. Disconnect the black
negative ( ) cable from the
vehicle that had the bad battery.