GMC 2006 Savana Owner's Manual page 320

The tools you will be using include the jack (A), jack
handle extension (B), jack handle (C), wheel wrench (D),
and the ratchet (E).
The spare tire is stored underneath the rear of your
vehicle. You will use the wheel wrench (D) and
the ratchet (E) to lower the spare tire from the vehicle.
5-72
To lower the spare tire from the vehicle, do the following:
2. Put the flat chisel end of the wheel wrench on an
angle through the hole between the body and the
bumper. Be sure the flat end connects into the
hoist shaft.
1. Attach the wheel
wrench and ratchet,
with the DOWN
side facing you.
The wheel wrench
has a socket end and
a flat chisel end.
Note that there is an
UP side and a DOWN
side on the ratchet.