GMC 1998 Savana Van Owner's Manual page 226

For vans with the 15-passenger seating arrangement,
the jack is secured on the rear passenger side floor of
the vehicle.
Remove the retaining wing bolt and lift it out of the
mounting bracket. Set the jack and jacking equipment
near the flat tire.
I
The ratchet has a DOWN side and an UP side.
Attach the ratchet, with the DOWN side facing you, to
the extension. The extension has a socket end and
a flat
chisel end.
Put the flat end of the extension on an angle through the
hole in the rear door frame, above the bumper. Be sure
the flat end connects into the hoist shaft.
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