2009 CADILLAC STS wheel size

Tire Chains
{CAUTION:
If your VEHICLE has P255/45R17, P255/45ZR18,
P275/40R19, or 255/45ZR18 size tires, do not use
tire chains, as there is not enough clearance.
Tire chains used on a vehicle without the proper
amount of clearance can cause damage to the
brakes, suspension, or other vehicle parts.
The area damaged by the tire chains could
cause you to lose control of the vehicle and
you or others may be injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
CAUTION: (Continued)
CAUTION: (Continued)
conditions. Follow that manufacturer’s instructions.
To help avoid damage to the vehicle, drive slowly,
readjust, or remove the device if it is contacting
the vehicle, and do not spin the vehicle’s wheels.
If you do nd traction devices that will t, install
them on the rear tires only.
Notice:If your vehicle has P235/50R17 size tires,
use tire chains only where legal and only when you
must. Use only SAE Class S-type chains that are
the proper size for your tires. Install them on the rear
tires and tighten them as tightly as possible with
the ends securely fastened. Drive slowly and follow
the chain manufacturer’s instructions. If you can
hear the chains contacting your vehicle, stop
and retighten them. If the contact continues, slow
down until it stops. Driving too fast or spinning the
wheels with chains on will damage your vehicle.
5-81

Full-Size Tire and Tools
After you have put the compact spare tire on your
vehicle, you will need to do the following to store
the at tire in your trunk.
1. Open the trunk. SeeTrunk on page 2-15.
2. Store the jack and wheel wrench in the jack
container in the trunk.
When storing the jack, in the container, it must be
raised until the screw end is ush with the edge
of the jack.
3. Store the at tire as far forward in the trunk as
possible.
The compact spare is for temporary use only. Replace
the compact spare tire with a full-size tire as soon
as you can.
Compact Spare Tire and Tools
Use the following diagram as a guide for storing the
compact spare tire and tools in the trunk:
A. Compact Spare
Tire Cover
B. Stow Rod Cap
C. Plastic Wing Nut
D. RetainerE. Jack Container
Package (With Wheel
Wrench and Jack)
F. Compact Spare Tire
G. Foam Support
H. Bolt
1. Open the trunk. SeeTrunk on page 2-15.
2. Make sure the foam support (G) is in place in the
trunk area.
5-113

3. Reinstall the compact spare tire (F) making sure to
line up the wheel center hole with the bolt (H) and
place on the compartment oor.
4. Insert the jack container (E) with wheel wrench and
jack into the center of the compact spare tire making
sure to line up the wheel nut hole with the bolt (H) on
the compartment oor.
5. Secure the tire and wheel with the retainer (D) and
wing nut (C).
6. Cover the exposed bolt with the stow rod cap (B).
7. Reinstall the compact spare tire cover (A).
Compact Spare Tire
Although the compact spare tire was fully inated
when the vehicle was new, it can lose air after a time.
Check the ination pressure regularly. It should be
60 psi (420 kPa).
After installing the compact spare on the vehicle, you
should stop as soon as possible and make sure the spare
tire is correctly inated. The compact spare is made to
perform well at speeds up to 65 mph (105 km/h) for
distances up to 3,000 miles (5 000 km), so you can nishyour trip and have the full-size tire repaired or replaced
where you want. You must calibrate the tire ination
monitor system after installing or removing the compact
spare. SeeTire Pressure Monitor System on page 5-66.
The system may not work correctly when the compact
spare is installed on the vehicle. Of course, it’s best to
replace the spare with a full-size tire as soon as you can.
The spare will last longer and be in good shape in case
you need it again.
Notice:When the compact spare is installed,
do not take the vehicle through an automatic car
wash with guide rails. The compact spare can
get caught on the rails which can damage the
tire, wheel and other parts of the vehicle.
Do not use the compact spare on other vehicles.
And do not mix the compact spare tire or wheel with
other wheels or tires. They will not t. Keep the
spare tire and its wheel together.
Notice:Tire chains will not t the compact spare.
Using them can damage the vehicle and can damage
the chains too. Do not use tire chains on the
compact spare.
5-114

At Least Once a Month
Tire Ination Check
Inspect the vehicle’s tires and make sure they are inated
to the correct pressures. Do not forget to check the spare
tire, if the vehicle has one. SeeInflation - Tire Pressure
on page 5-64. If the vehicle has a spare tire, check to
make sure it is stored securely. SeeChanging a Flat Tire
on page 5-104.
Tire Wear Inspection
Tire rotation is recommended if the vehicle has the same
size tires at all four wheel positions and may be required
for high mileage highway drivers prior to the Engine Oil
Life System service notication. Check the tires for wear
and, if necessary, rotate the tires. SeeTire Inspection
and Rotation on page 5-71.
At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough
room around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-33.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in P (Park) or N (Neutral). If the
vehicle starts in any other position, contact
your dealer/retailer for service.
6-11

Stabilitrak®System........................................... 4-6
Start Vehicle, Remote......................................2-11
Starting the Engine.........................................2-27
Steering........................................................4-12
Steering Wheel Controls, Audio.......................3-131
Steering Wheel Controls, Memory.....................2-77
Steering Wheel, Heated..................................... 3-7
Steering Wheel, Power Tilt Wheel and
Telescopic Steering Column............................ 3-6
Storage Areas
Center Console Storage Area........................2-60
Convenience Net.........................................2-60
Cupholders.................................................2-60
Glove Box..................................................2-60
Storing the Tire Sealant and Compressor Kit.........5-94
Stuck in Sand, Mud, Ice, or Snow.....................4-23
Sun Visors.....................................................2-21
Sunroof.........................................................2-60
T
Tachometer....................................................3-57
TCS Warning Light..........................................3-63
Telescopic Steering Column, Power
Tilt Wheel.................................................... 3-6
Theft - Deterrent System..................................2-21
Theft-Deterrent, Radio....................................3-130Theft-Deterrent Systems...................................2-21
Immobilizer.................................................2-24
Immobilizer Operation...................................2-24
Time, Setting..................................................3-98
Tire
Pressure Light.............................................3-65
Tire Sealant
Storing.......................................................5-94
Tires.............................................................5-54
Aluminum or Chrome-Plated Wheels,
Cleaning...............................................5-110
Buying New Tires........................................5-74
Chains.......................................................5-81
Changing a Flat Tire....................................5-94
Cleaning...................................................5-111
Compact Spare Tire...................................5-104
Different Size..............................................5-76
High-Speed Operation..................................5-65
If a Tire Goes Flat.......................................5-84
Ination - Tire Pressure................................5-64
Inspection and Rotation................................5-71
Installing the Spare Tire................................5-97
Lifting the Vehicle........................................5-82
Pressure Monitor Operation...........................5-68
Pressure Monitor System..............................5-66
Removing the Flat Tire.................................5-97
Removing the Spare Tire and Tools...............5-96
12

W
Warning Lights, Gages, and Indicators...............3-55
Warnings
DIC Warnings and Messages........................3-79
Hazard Warning Flashers............................... 3-6
Safety and Symbols......................................... iv
Washer, Headlamps........................................3-16
Wheels
Alignment and Tire Balance..........................5-79
Different Size..............................................5-76
Replacement...............................................5-79
Where to Put the Restraint...............................1-37
Windows.......................................................2-18
Power ........................................................2-19
Windshield
Rainsense™ II Wipers..................................3-14
Replacement...............................................5-52
Washer......................................................3-15Windshield (cont.)
Washer Fluid..............................................5-38
Wiper Blade Replacement.............................5-52
Wiper Blades, Cleaning..............................5-110
Wiper Fuses.............................................5-113
Wipers.......................................................3-13
Winter Driving................................................4-21
Winter Tires...................................................5-55
Wiper Activated Headlamps..............................3-36
X
XM Radio Messages.....................................3-114
XM™ Satellite Radio Antenna System..............3-134
Y
Your Vehicle and the Environment....................... 6-2
14