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Tire Size
The following illustration shows an example of a typical
passenger vehicle tire size.
(A) Passenger (P-Metric) Tire:The United States
version of a metric tire sizing system. The letter P as the
rst character in the tire size means a passenger
vehicle tire engineered to standards set by the U.S. Tire
and Rim Association.
(B) Tire Width:The three-digit number indicates the
tire section width in millimeters from sidewall to sidewall.
(C) Aspect Ratio:A two-digit number that indicates
the tire height-to-width measurements. For example, if
the tire size aspect ratio is 60, as shown in item C of
the illustration, it would mean that the tire’s sidewall is
60 percent as high as it is wide.(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire. The
letter R means radial ply construction; the letter D means
diagonal or bias ply construction; and the letter B means
belted-bias ply construction.
(E) Rim Diameter:Diameter of the wheel in inches.
(F) Service Description:These characters represent
the load range and speed rating of the tire. The load
index represents the load carry capacity a tire is certi ed
to carry. The load index can range from 1 to 279. The
speed rating is the maximum speed a tire is certi ed
to carry a load. Speed ratings range from A to Z.
Tire Terminology and De nitions
Air Pressure:The amount of air inside the tire pressing
outward on each square inch of the tire. Air pressure
is expressed in pounds per square inch (psi) or
kilopascal (kPa).
Accessory Weight:This means the combined weight
of optional accessories. Some examples of optional
accessories are, automatic transmission, power steering,
power brakes, power windows, power seats, and air
conditioning.
Aspect Ratio:The relationship of a tire’s height to
its width.
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Vehicles equipped with a tire pressure monitoring
system may give an inaccurate low-pressure warning if
non-TPC spec rated tires are installed on your
vehicle. Non-TPC Spec rated tires may give a
low-pressure warning that is higher or lower than the
proper warning level you would get with TPC Spec rated
tires. SeeTire Pressure Monitor System on page 5-61.
Your vehicle’s original equipment tires are listed on
the Tire and Loading Information Label. This label
is attached to the vehicle’s center pillar (B-pillar). See
Loading Your Vehicle on page 4-44, for more information
about the Tire and Loading Information Label and its
location on your vehicle.
Different Size Tires and Wheels
If you add wheels or tires that are a different size than
your original equipment wheels and tires, this may
affect the way your vehicle performs, including its
braking, ride and handling characteristics, stability, and
resistance to rollover. Additionally, if your vehicle
has electronic systems such as, anti-lock brakes,
traction control, and electronic stability control, the
performance of these systems can be affected.
{CAUTION:
If you add different sized wheels, your vehicle
may not provide an acceptable level of
performance and safety if tires not
recommended for those wheels are selected.
You may increase the chance that you will
crash and suffer serious injury. Only use GM
speci c wheel and tire systems developed for
your vehicle, and have them properly installed
by a GM certi ed technician.
SeeBuying New Tires on page 5-64andAccessories
and Modi cations on page 5-3for additional information.
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Reporting Safety Defects to
General Motors
In addition to notifying NHTSA (or Transport Canada) in
a situation like this, we certainly hope you will notify
us. Please call us at 1-800-458-8006, or write:
Cadillac Customer Assistance Center
Cadillac Motor Car Division
P.O. Box 33169
Detroit, MI 48232-5169
In Canada, please call us at 1-888-446-2000. Or, write:
Canadian Cadillac Customer Communication
Centre, 163-005
General Motors of Canada Limited
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle
suspension, brakes, electrical, steering, body, etc.
Transmission, Transaxle, Transfer
Case Unit Repair Manual
This manual provides information on unit repair
service procedures, adjustments, and speci cations
for GM transmissions, transaxles, and transfer cases.
7-15
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Audio System(s) (cont.)
Diversity Antenna System............................3-116
Navigation/Radio System,
see Navigation Manual............................3-100
Radio with CD............................................3-83
Setting the Time..........................................3-82
Theft-Deterrent Feature...............................3-113
Understanding Radio Reception...................3-114
XM™ Satellite Radio Antenna System...........3-116
Automatic Transmission
Fluid..........................................................5-23
Operation...................................................2-28
B
Battery..........................................................5-40
Exterior Lighting Battery Saver......................3-20
Before Leaving on a Long Trip.........................4-36
Brake
Anti-Lock Brake System (ABS)........................ 4-7
Emergencies................................................ 4-8
Panic Assist................................................4-11
Parking......................................................2-31
System Warning Light..................................3-39
Brake Pedal, Throttle.......................................2-26
Brakes..........................................................5-37
Braking........................................................... 4-6Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-22
Bulb Replacement...........................................5-50
Halogen Bulbs............................................5-50
High Intensity Discharge (HID) Lighting...........5-50
Buying New Tires...........................................5-64
C
Calibration.....................................................2-37
California Fuel.................................................. 5-6
California Proposition 65 Warning....................... 5-3
Canadian Owners................................................ ii
Capacities and Speci cations..........................5-103
Carbon Monoxide....................2-12, 2-35, 4-39, 4-52
Care of
Safety Belts................................................5-88
Your CD and DVD Player...........................3-115
Your CDs and DVDs ..................................3-115
Cargo Cover..................................................2-50
Cargo Management System.............................2-50
Cell Phone Storage Area.................................2-48
Center Console Storage Area...........................2-48
Chains, Tire...................................................5-69
Charging System Light....................................3-39
Check
Engine Light...............................................3-43
2