GMC Cadillac CTS 2004 Owner's Manual page 380

CAUTION:
{
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.
CAUTION:
{
Raising your vehicle with the jack improperly
positioned can damage the vehicle and even
make the vehicle fall. To help avoid personal
injury and vehicle damage, be sure to fit the
jack lift head into the proper location before
raising the vehicle.
3. Attach the wheel wrench to the jack.
4. Turn the wheel wrench counterclockwise to lower the
jack lift head until the jack fits under the vehicle.
5-86
5. Raise the jack by turning the wheel wrench
clockwise until the slots in the jack head fit into the
metal flange located behind the triangle on the
plastic molding as shown.
6. Put the compact spare tire near you.
7. Raise the vehicle by turning the wheel wrench
clockwise. Raise the vehicle far enough off the
ground for the compact spare tire to fit under
the vehicle.
8. Remove all the wheel nuts and take off the flat tire.