Cadillac 2010 CTS Sport Sedan Owner's Manual page 396

1. Do a safety check before
proceeding. See
for more
information.
2. Loosen the wheel nuts, but do
not remove them yet, using the
wheel wrench. Turn the handle
about 180 degrees, then return
the handle back to the starting
position. This avoids taking the
wrench off the lug nut for
each turn.
3. Find the jacking location using
the diagram above and
corresponding V-shaped locating
notches located in the plastic
molding.
4. Insert the hooked end of the
extension handle through the
jack and the flat end through the
wheel wrench.
Getting under a vehicle when it is
jacked up is dangerous. If the
vehicle slips off the jack, you
could be badly injured or killed.
Never get under a vehicle when it
is supported only by a jack.