wheel size CADILLAC XLR 2008 1.G Owners Manual

Tire Inspection and Rotation...........................6-65
When It Is Time for New Tires.......................6-66
Buying New Tires.........................................6-67
Different Size Tires and Wheels......................6-68
Uniform Tire Quality Grading..........................6-69
Wheel Alignment and Tire Balance..................6-70
Wheel Replacement......................................6-70
Tire Chains..................................................6-73
Lifting Your Vehicle.......................................6-74
If a Tire Goes Flat........................................6-78
Appearance Care............................................6-80
Interior Cleaning...........................................6-80
Fabric/Carpet...............................................6-81
Leather.......................................................6-82
Instrument Panel, Vinyl, and Other
Plastic Surfaces........................................6-82
Wood Panels...............................................6-82
Speaker Covers............................................6-82
Care of Safety Belts......................................6-83
Weatherstrips...............................................6-83
Washing Your Vehicle...................................6-83
Cleaning Exterior Lamps/Lenses.....................6-84Finish Care..................................................6-84
Windshield and Wiper Blades.........................6-85
Aluminum or Chrome-Plated Wheels
and Trim..................................................6-85
Tires...........................................................6-86
Sheet Metal Damage.....................................6-86
Finish Damage.............................................6-87
Underbody Maintenance................................6-87
Fiberglass Springs (Composite Springs)...........6-87
Chemical Paint Spotting.................................6-87
Vehicle Care/Appearance Materials..................6-88
Vehicle Identication......................................6-89
Vehicle Identication Number (VIN).................6-89
Service Parts Identication Label.....................6-89
Electrical System............................................6-89
Add-On Electrical Equipment..........................6-89
Windshield Wiper Fuses................................6-90
Power Windows and Other Power Options.......6-90
Fuses and Circuit Breakers............................6-90
Instrument Panel Fuse Block..........................6-90
Underhood Fuse Block..................................6-94
Capacities and Specications..........................6-97
Section 6 Service and Appearance Care
6-2

Low-Prole Tires (XLR-V)
If your vehicle has P235/45R19 or P255/40R19
size tires, they are classied as low-prole
tires. These tires are designed for very
responsive driving on wet or dry pavement.
You may also notice more road noise with
low-prole performance tires and that they tend to
wear faster.
Notice:If your vehicle has low-prole tires,
they are more susceptible to damage from road
hazards or curb impact than standard prole
tires. Tire and/or wheel assembly damage
can occur when coming into contact with
road hazards like, potholes, or sharp edged
objects, or when sliding into a curb.
Your vehicle warranty does not cover this type
of damage. Keep tires set to the correct
ination pressure and, when possible avoid
contact with curbs, potholes, and other
road hazards.
Winter Tires (XLR-V)
If you expect to drive on snow or ice covered roads
often, you may want to get winter tires for your vehicle.
All season tires provide good overall performance on
most surfaces but they may not offer the traction
you would like or the same level of performance as
winter tires on snow or ice covered roads.
Winter tires, in general, are designed for increased
traction on snow and ice covered roads. With winter
tires, there may be decreased dry road traction,
increased road noise, and shorter tread life. After
switching to winter tires, be alert for changes in vehicle
handling and braking.
See your dealer for details regarding winter tire
availability and proper tire selection. Also, seeBuying
New Tires on page 6-67.
If you choose to use winter tires:
Use tires of the same brand and tread type on all
four wheel positions.
Use only radial ply tires of the same size, load range,
and speed rating as the original equipment tires.
Winter tires with the same speed rating as your original
equipment tires may not be available for H, V, W, Y,
and ZR speed rated tires. If you choose winter tires with
a lower speed rating, never exceed the tire’s maximum
speed capability.
6-53

(F) Uniform Tire Quality Grading (UTQG):
Tire manufacturers are required to grade
tires based on three performance factors:
treadwear, traction and temperature resistance.
For more information seeUniform Tire Quality
Grading on page 6-69.
(G) Maximum Cold Ination Load Limit:
Maximum load that can be carried and the
maximum pressure needed to support that load.
Tire Size
The following illustration shows an example of a
typical passenger (p-metric) 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 certied to carry. The load index
can range from 1 to 279. The speed rating is
the maximum speed a tire is certied to carry a
load. Speed ratings range from A to Z.
6-55

Tire Pressure Monitor Operation
The Tire Pressure Monitor System (TPMS) is designed
to warn the driver when a low tire pressure condition
exists. TPMS sensors are mounted onto each tire
and wheel assembly on your vehicle. The TPMS
sensors monitor the air pressure in the vehicle’s tires
and transmits the tire pressure readings to a receiver
located in the vehicle.
When a low tire pressure
condition is detected, the
TPMS illuminates the
low tire pressure warning
light, located in the
instrument panel cluster.
At the same time a message to check the pressure in a
specic tire appears on the Driver Information Center
(DIC) display. The low tire pressure warning light
and the DIC warning message appear at each ignition
cycle until the tires are inated to the correct ination
pressure. Using the DIC, tire pressure levels canbe viewed by the driver. For additional information and
details about the DIC operation and displays see
DIC Operation and Displays on page 3-60andDIC
Warnings and Messages on page 3-63.
The low tire pressure warning light may come on in cool
weather when the vehicle is rst started, and then
turn off as you start to drive. This could be an early
indicator that the air pressure in the tire(s) are getting
low and need to be inated to the proper pressure.
A Tire and Loading Information label, attached to your
vehicle, shows the size of your vehicle’s original
equipment tires and the correct ination pressure for
your vehicle’s tires when they are cold. SeeLoading
Your Vehicle on page 5-22, for an example of the
Tire and Loading Information label and its location on
your vehicle. Also seeInflation - Tire Pressure on
page 6-60for additional information.
Your vehicle’s TPMS can warn you about a low tire
pressure condition but it does not replace normal
tire maintenance. SeeTire Inspection and Rotation on
page 6-65,When It Is Time for New Tires on page 6-66,
andTires on page 6-52.
Notice:Liquid tire sealants could damage the
Tire Pressure Monitor System (TPMS) sensors.
Sensor damage caused by using a tire sealant is not
covered by your warranty. Do not use liquid tire
sealants.
6-63

Tire Inspection and Rotation
We recommend that you regularly inspect your
vehicle’s tires for signs of wear or damage.
SeeWhen It Is Time for New Tires on page 6-66
for additional information.
If your vehicle has P235/50R18 size tires they
should be rotated any time you notice unusual
wear. Rotate the tires as soon as possible
and check wheel alignment. Also check for
damaged tires or wheels. SeeWhen It Is Time for
New Tires on page 6-66andWheel Replacement
on page 6-70.
When rotating P235/50R18 size tires, always use
the correct rotation pattern shown here.After the tires have been rotated, adjust the front
and rear ination pressures as shown on the Tire
and Loading Information label, seeInflation - Tire
Pressure on page 6-60andLoading Your Vehicle
on page 5-22. Vehicles that have the Tire Pressure
Monitor System (TPMS) need the TPMS sensors
reset after a tire rotation is performed. A special tool
is needed to reset the sensor identication codes.
See your dealer/retailer for service. Make certain
that all wheel nuts are properly tightened. See
Wheel Replacement on page 6-70and “Wheel Nut
Torque” underCapacities and Specifications on
page 6-97
.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel
could come off and cause a crash. When
you change a wheel, remove any rust or
dirt from places where the wheel attaches
to the vehicle. In an emergency, you can
use a cloth or a paper towel to do this;
but be sure to use a scraper or wire brush
later, if you need to, to get all the rust or
dirt off.
6-65

Buying New Tires
GM has developed and matched specic tires for your
vehicle. The original equipment tires installed on
your vehicle, when it was new, were designed to meet
General Motors Tire Performance Criteria Specication
(TPC Spec) system rating. If you need replacement
tires, GM strongly recommends that you get tires with
the same TPC Spec rating. This way, your vehicle
will continue to have tires that are designed to give the
same performance and vehicle safety, during normal
use, as the original tires.
GM’s exclusive TPC Spec system considers over a
dozen critical specications that impact the overall
performance of your vehicle, including brake system
performance, ride and handling, traction control, and tire
pressure monitoring performance. GM’s TPC Spec
number is molded onto the tire’s sidewall near the tire
size. If the tires have an all-season tread design,
the TPC Spec number will be followed by an MS for
mud and snow. SeeTire Sidewall Labeling on
page 6-54, for additional information.
GM recommends replacing tires in sets of four. This is
because uniform tread depth on all tires will help
keep your vehicle performing most like it did when the
tires were new. Replacing less than a full set of tires can
affect the braking and handling performance of your
vehicle. SeeTire Inspection and Rotation on page 6-65.Winter tires with the same speed rating as your original
equipment tires may not be available for H, V, W, Y
and ZR speed rated tires. If you choose snow tires with
a lower speed rating, never exceed the tire’s maximum
speed capability.
{CAUTION:
Mixing tires could cause you to lose control
while driving. If you mix tires of different sizes
(other than those originally installed on your
vehicle), brands, or types (radial and bias-belted
tires), the vehicle may not handle properly, and
you could have a crash. Using tires of different
sizes (other than those originally installed on
your vehicle), brands or types, may also cause
damage to your vehicle. Be sure to use the
correct size, brand, and type tires on all
four wheels.
6-67

{CAUTION:
If you use bias-ply tires on your vehicle,
the wheel rim anges could develop
cracks after many miles of driving. A tire
and/or wheel could fail suddenly, causing
a crash. Use only radial-ply tires with the
wheels on your vehicle.
If you must replace your vehicle’s tires with those that
do not have a TPC Spec number, make sure they
are the same size, load range, speed rating, and
construction type (radial and bias-belted tires) as your
vehicle’s original tires.
Vehicles that have a tire pressure monitoring system
could give an inaccurate low-pressure warning if
non-TPC Spec rated tires are installed on it. 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 6-61.
Your vehicle’s original equipment tires are listed on the
Tire and Loading Information label. SeeLoading
Your Vehicle on page 5-22, 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
specic wheel and tire systems developed for
your vehicle, and have them properly installed
by a GM certied technician.
SeeBuying New Tires on page 6-67andAccessories
and Modifications on page 6-3for additional information.
6-68

Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has been
used or how far it has been driven. It could fail
suddenly and cause a crash. If you have to
replace a wheel, use a new GM original
equipment wheel.
Tire Chains
{CAUTION:
Do not use tire chains. 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
your 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 conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, re-adjust or remove the
device if it is contacting your vehicle, and do
not spin your wheels. If you do nd traction
devices that will t, install them on the
rear tires.
6-73

Service (cont.)
California Pershlorate Materials Requirements . . . 6-4
California Proposition 65 Warning.................... 6-3
Doing Your Own Work................................... 6-4
Engine Soon Light.......................................3-54
Publications Ordering Information...................8-16
Service, Scheduling Appointments.....................8-10
Servicing Your Airbag-Equipped Vehicle..............1-50
Setup Menu...................................................4-13
Sheet Metal Damage.......................................6-86
Shifting Into Park (P).......................................2-32
Shifting Out of Park (P)...................................2-33
Signals, Turn and Lane-Change.......................... 3-8
Six-Disc CD Changer......................................4-67
Specications, Capacities.................................6-97
Speedometer..................................................3-45
StabiliTrak
®System.......................................... 5-8
Starting the Engine.........................................2-24
Steering.......................................................... 5-9
Steering Wheel Controls, Audio.........................3-82
Steering Wheel Controls, Memory....................... 1-3
Steering Wheel, Heated..................................... 3-7
Steering Wheel, Power Tilt Wheel and
Telescopic Steering Column............................ 3-7
Storage Areas
Center Console Storage Area........................2-52
Convenience Net.........................................2-53
Cupholder(s)...............................................2-52
Glove Box..................................................2-52
Rear Storage Area.......................................2-53Storage Areas (cont.)
Stuck in Sand, Mud, Ice, or Snow.....................5-21
Sun Visors.....................................................2-19
Symbols........................................................4-44
System Needs Service, If.................................4-52
System Overview
Overview, Navigation System.......................... 4-2
T
Tachometer....................................................3-45
TCS Warning Light..........................................3-52
Telescopic Steering Column, Power Tilt Wheel...... 3-7
Theft-Deterrent, Radio.....................................3-82
Theft-Deterrent System....................................2-19
Theft-Deterrent Systems...................................2-19
Immobilizer.................................................2-21
Immobilizer Operation...................................2-22
Tire
Pressure Light.............................................3-53
Tires.............................................................6-52
Aluminum or Chrome-Plated Wheels,
Cleaning.................................................6-85
Buying New Tires........................................6-67
Chains.......................................................6-73
Cleaning....................................................6-86
Different Size..............................................6-68
If a Tire Goes Flat.......................................6-78
Ination - Tire Pressure................................6-60
12

V
Valet Lockout Switch.......................................2-21
Vehicle
Control........................................................ 5-3
Damage Warnings............................................ v
Loading......................................................5-22
Symbols......................................................... v
Vehicle Data Recording and Privacy..................8-17
Vehicle Identication
Number (VIN).............................................6-89
Service Parts Identication Label...................6-89
Vehicle Personalization
DIC ...........................................................3-76
Vehicle Positioning..........................................4-51
Ventilation Adjustment......................................3-42
Visors...........................................................2-19
Voice Recognition...........................................4-76
Voltmeter Gage..............................................3-50
W
Warning Lights, Gages and Indicators................3-43
Warnings
DIC Warnings and Messages........................3-63
Hazard Warning Flashers............................... 3-6
Other Warning Devices.................................. 3-6
Safety and Symbols......................................... iv
Vehicle Damage............................................... vWasher, Headlamps........................................3-12
Waypoint, Edit................................................4-24
Wheels
Alignment and Tire Balance..........................6-70
Different Size..............................................6-68
Replacement...............................................6-70
Windows.......................................................2-16
Power........................................................2-17
Windshield
Rainsense™ Wipers.....................................3-11
Replacement...............................................6-50
Washer......................................................3-12
Washer Fluid..............................................6-36
Wiper Blade Replacement.............................6-50
Wiper Blades, Cleaning................................6-85
Wiper Fuses...............................................6-90
Wipers.......................................................3-10
Winter Driving................................................5-17
Winter Tires...................................................6-53
Wiper Activated Headlamps..............................3-29X
XM™ Satellite Radio Antenna System................3-85
Y
Your Vehicle and the Environment....................... 7-2
14