GMC 1997 Suburban Owner's Manual page 246

7 . Don't 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.
8. Now connect the black
negative
(-)
cable to
the good battery's
negative
(-)
cable.
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 of the vehicle with the dead battery.
5-6