GMC 1998 Savana Van Owner's Manual page 209

9. Make your last connection away from the battery, to
the engine block, frame or other unpainted metal
parts of your vehicle. A ground location has been
provided through a stud attached to the body surface.
10. Remove the cap on the ground location before using.
11. Now start the vehicle with the good battery and run
the engine for a while.
12. Try to start the vehicle with the dead battery. If it
won't start after a few tries, it probably needs service.
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