GMC 1993 Safari Owner's Manual page 211

1
CAUTION
A
Fans or other moving engine parts can injure you badly. Keep your
hands away from moving parts once the engines are running.
I-
Dead Batfey
i
Batfery
6. Connect the red positive
(t)
cable to the positive
(t)
terminal of the
vehicle with the dead battery. Use a remote positive
(t)
terminal if the
vehicle has one.
7. Don't let the other end touch metal. Connect it to the positive
(t)
terminal of the good battery. Use a remote positive
(t)
terminal if the
vehicle has one.
8. Now connect the black negative (-) cable to the good battery's negative
(-)
terminal.
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 part on the engine of the vehicle with the dead battery.
but not near engine parts that move. The electrical connection is just as
good there, but the chance of sparks getting back to the battery is much
less.
9. Attach the cable about 18 inches (45 cm) away from the dead battery,
5-5