2003 CADILLAC CTS lock

5-16
1. Park the vehicle on a level surface. You can remove
the coolant surge tank pressure cap when the cooling
system, including the coolant surge tank pressure cap
and upper radiator hose, is no longer hot. Turn the
pressure cap slowly counterclockwise (left) about
one
-quarter turn and then stop.
If you hear a hiss, wait for that to stop. A hiss means
there is still some pressure left.
2. Then keep turning the pressure cap slowly, and
remove it.

5-19
Changing a Flat Tire
If a tire goes flat, avoid further tire and wheel damage
by driving slowly to a level place. Turn on your hazard
warning flashers.
CAUTION:
Changing a tire can cause an injury. The vehicle
can slip off the jack and roll over you or other
people. You and they could be badly injured.
Find a level place to change your tire. To help
prevent the vehicle from moving:
1. Set the parking brake firmly.
2. Put an automatic transmission shift lever in
PARK (P), or shift a manual transmission to
FIRST (1) or REVERSE (R).
3. Turn off the engine.
To be even more certain the vehicle won't move,
you can put blocks at the front and rear of the
tire farthest away from the one being changed.
That would be the tire on the other side of the
vehicle, at the opposite end.
The following steps will tell you how to use the jack and
change a tire.

5-20 Removing the Spare Tire and Tools
The equipment you'll need is in the trunk.
Instructions for changing your tires are on the inside of
the compact spare tire cover located in your trunk.
To gain access to the instructions, spare tire and jacking
equipment, do the following:
1. Turn the center nut on
the compact spare tire
cover counterclockwise
to remove it. Then
remove the cover.
2. Remove the compact spare tire. See ªCompact Spare
Tireº later in this section for more information about
the compact spare tire.

5-21
3. Turn the nut holding the jack counterclockwise and
remove it. Then remove the jack and wheel wrench.The tools you'll be using include the jack (A) and the
wheel wrench (B).

5-22 Removing Wheel Covers and Wheel Nut
Caps (If Equipped)
If your vehicle has wheel covers, use the flat end of the
wheel wrench to remove the covers. Turn the wheel
wrench clockwise to gently pry off the wheel cover.
Be careful not to scratch the aluminum wheel edge and
don't try to remove the wheel cover with your hands.
If your vehicle has wheel nut caps, turn the wheel
wrench counterclockwise to remove the caps.
If your vehicle has 17 inch (43.2 cm) wheels, there is a
center cap that does not need to be removed in order to
remove the wheel from the vehicle.

5-23 Removing the Flat Tire and Installing the
Spare Tire
A. Wheel Wrench
B. Wheel Nut
1. Place the wheel wrench securely over the wheel nut.
Turn the wheel wrench counterclockwise to loosen
all the wheel nuts. Don't remove them yet.
A. Front Jacking Location
B. Rear Jacking Location
2. Find the jacking location using the diagram
above and corresponding hoisting notches located
in the plastic molding. The notches in the plastic
molding are marked with a triangle shape to help
you find them.
The front location is 14 inches (35.6 cm) from the
rear edge of the front wheel well, and the rear
location is 7 inches (17.8 cm) from the front edge of
the rear wheel well.

5-24
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.
A. Flat Tire
B. Compact Spare Tire
5. Raise the jack by turning the wheel wrench
clockwise until the metal flanges fit firmly into the
notches in the plastic molding.
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.

5-26
11. Put the wheel nuts back
on with the rounded end
of the nuts toward the
wheel. Tighten each
wheel nut by turning it
clockwise with your
hand until the wheel is
held against the hub.
12. Lower the vehicle by turning the wheel wrench
counterclockwise. Lower the jack completely.