GMC Sierra 2005 Owner's Manual page 448

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. Now connect the black negative (−) cable to the
negative (−) terminal of the good battery. Use a
remote negative (−) terminal if the vehicle has one.
The vehicle's remote negative (–) terminal is
marked GND.
5-54
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.
10. 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 of the vehicle with
the dead battery, or to a remote negative (–)
terminal if the vehicle has one.
V8 engine shown, other
engines similar
12. Now start the vehicle with the good battery and run
the engine for a while.
13. Try to start the vehicle that had the dead battery.
If it will not start after a few tries, it probably
needs service.
11. Connect the other end
of the negative (−)
cable to the remote
negative (−) terminal,
marked GND, on
the vehicle with the
dead battery. See
Engine Compartment
Overview on page 5-14
for the location of
your vehicle's remote
negative (−) terminal.