Cadillac 2009 STS-V - Manual (Page 433)

The tools you will be using include the jack (A) and the
wheel wrench (B).
Removing the Flat Tire and
Installing the Spare Tire
1. Do a safety check before proceeding. See Changing
a Flat Tire on page 5-104 for more information.
2. Loosen all of the wheel nuts, but do not remove
them yet, using the wheel wrench. Turn the
handle about 180 degrees, then flip the handle
back to the starting position. This avoids taking
the wrench off the lug nut for each turn.
5-107