GMC 2007 Savana Van Owner's Manual page 328

7. 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.
8. Now 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 a remote negative ( ) terminal on the
vehicle with the dead battery.
328
9. Connect the other end of the negative ( )
cable to the negative ( ) terminal location
on the vehicle with the dead battery.
Your vehicle has a remote negative ( )
terminal for this purpose. It is marked GND.
10. Now start the vehicle with the good battery
and run the engine for a while.
11. Try to start the vehicle that had the dead
battery. If it will not start after a few tries, it
probably needs service.