2018 BUICK REGAL wheel size

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290 Vehicle Care
necessary to replace only one
axle set of worn tires, place the
new tires on the rear axle.
Winter tires with the same speed
rating as the original equipment
tires may not be available for H,
V, W, Y and ZR speed rated
tires. Never exceed the winter
tires’maximum speed capability
when using winter tires with a
lower speed rating.
{Warning
Tires could explode during
improper service. Attempting
to mount or dismount a tire
could cause injury or death.
Only your dealer or authorized
tire service center should
mount or dismount the tires.
{Warning
Mixing tires of different sizes,
brands, or types may cause
loss of control of the vehicle,
resulting in a crash or other
vehicle damage. Use the
correct size, brand, and type
of tires on all wheels.
{Warning
Using bias-ply tires on the
vehicle may cause the wheel
rim flanges to develop cracks
after many miles of driving.
A tire and/or wheel could fail
suddenly and cause a crash.
Use only radial-ply tires with
the wheels on the vehicle.
If the vehicle tires must be
replaced with a tire that does not
have a TPC Spec number, make
sure they are the same size, load range, speed rating, and
construction (radial) as the
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.
See
Tire Pressure Monitor
System 0283.
The Tire and Loading
Information label indicates the
original equipment tires on the
vehicle. See Vehicle Load Limits
0 183.
Different Size Tires and
Wheels
If wheels or tires are installed that
are a different size than the original
equipment wheels and tires, vehicle
performance, including its braking,
ride and handling characteristics,
stability, and resistance to rollover
may be affected. If the vehicle has
electronic systems such as antilock
brakes, rollover airbags, traction

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Vehicle Care 291
control, electronic stability control,
or All-Wheel Drive, the performance
of these systems can also be
affected.
{Warning
If different sized wheels are used,
there may not be an acceptable
level of performance and safety if
tires not recommended for those
wheels are selected. This
increases the chance of a crash
and serious injury. Only use GM
specific wheel and tire systems
developed for the vehicle, and
have them properly installed by a
GM certified technician.
See Buying New Tires 0289 and
Accessories and Modifications
0 242.
Uniform Tire Quality
Grading
The following information relates
to the system developed by the
United States National Highway Traffic Safety Administration
(NHTSA), which grades tires by
treadwear, traction, and
temperature performance. This
applies only to vehicles sold in
the United States. The grades
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading
(UTQG) system does not apply
to deep tread, winter tires,
compact spare tires, tires with
nominal rim diameters of
10 to 12 inches (25 to 30 cm),
or to some limited-production
tires.
While the tires available on
General Motors passenger cars
and light trucks may vary with
respect to these grades, they
must also conform to federal
safety requirements and
additional General Motors Tire
Performance Criteria (TPC)
standards.
Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
All Passenger Car Tires Must
Conform to Federal Safety
Requirements In Addition To
These Grades.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course. For example, a tire
graded 150 would wear one and
one-half (1½) times as well on
the government course as a tire
graded 100. The relative
performance of tires depends
upon the actual conditions of
their use, however, and may
depart significantly from the

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Wheel Replacement
Replace any wheel that is bent,
cracked, or badly rusted or
corroded. If wheel nuts keep coming
loose, the wheel, wheel bolts, and
wheel nuts should be replaced.
If the wheel leaks air, replace it.
Some aluminum wheels can be
repaired. See your dealer if any of
these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the
same load-carrying capacity,
diameter, width, offset, and be
mounted the same way as the one it
replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor
System (TPMS) sensors with new
GM original equipment parts.{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel
nuts can be dangerous. It could
affect the braking and handling of
the vehicle. Tires can lose air,
and cause loss of control, causing
a crash. Always use the correct
wheel, wheel bolts, and wheel
nuts for replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or
odometer calibration, headlamp
aim, bumper height, vehicle
ground clearance, and tire or tire
chain clearance to the body and
chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used
one is dangerous. How it has
been used or how far it has been
driven may be unknown. It could
fail suddenly and cause a crash.
When replacing wheels, use a
new GM original equipment
wheel.
Tire Chains
{Warning
If the vehicle has 245/45R18 or
245/40R19 size tires, 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(Continued)

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Warning (Continued)
cause loss of control and a crash.
Use another type of traction
device only if its manufacturer
recommends it for the vehicle's
tire size combination and road
conditions. Follow that
manufacturer's instructions. To
avoid vehicle damage, drive slow
and readjust or remove the
traction device if it contacts the
vehicle. Do not spin the wheels. If
traction devices are used, install
them on the front tires.
Caution
If the vehicle is equipped with a
tire size other than 245/45R18 or
245/40R19, use tire chains only
where legal and only when
necessary. Use low profile chains
that add no more than 12 mm
thickness to the tire tread and(Continued)
Caution (Continued)
inner sidewall. Use chains that
are the proper size for the tires.
Install them on the tires of the
front axle. Don't use chains on the
tires of the rear axle. Tighten
them as tightly as possible with
the ends securely fastened. Drive
slowly and follow the chain
manufacturer's instructions. If the
chains contact the 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 the vehicle.
If a Tire Goes Flat
It is unusual for a tire to blow out
while driving, especially if the tires
are maintained properly. See Tires
0 274. If air goes out of a tire, it is
much more likely to leak out slowly.
But if there is ever a blowout, here
are a few tips about what to expect
and what to do: If a front tire fails, the flat tire
creates a drag that pulls the vehicle
toward that side. Take your foot off
the accelerator pedal and grip the
steering wheel firmly. Steer to
maintain lane position, and then
gently brake to a stop, well off the
road, if possible.
A rear blowout, particularly on a
curve, acts much like a skid and
may require the same correction as
used in a skid. Stop pressing the
accelerator pedal and steer to
straighten the vehicle. It may be
very bumpy and noisy. Gently brake
to a stop, well off the road,
if possible.
{Warning
Driving on a flat tire will cause
permanent damage to the tire.
Re-inflating a tire after it has been
driven on while severely
underinflated or flat may cause a
blowout and a serious crash.
Never attempt to re-inflate a tire
(Continued)

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Warning (Continued)
using accessory locking wheel
nuts. SeeCapacities and
Specifications 0344 for original
equipment wheel nut torque
specifications.
Caution
Improperly tightened wheel nuts
can lead to brake pulsation and
rotor damage. To avoid expensive
brake repairs, evenly tighten the
wheel nuts in the proper
sequence and to the proper
torque specification. See
Capacities and Specifications
0 344 for the wheel nut torque
specification.17. Tighten the wheel nuts firmly in a crisscross sequence, as
shown.
18. Lower the jack all the way and remove the jack from under the
vehicle.
19. Tighten the wheel nuts firmly with the wheel wrench.
When reinstalling the wheel cover or
center cap on the full-size tire,
tighten all five plastic caps hand
snug, then tighten them with the
wheel wrench an additional
one-quarter turn.
Caution
Wheel covers will not fit on the
vehicle's compact spare. If you try
to put a wheel cover on the
compact spare, the cover or the
spare could be damaged.
Storing a Flat or Spare Tire
and Tools
{Warning
Storing a jack, a tire, or other
equipment in the passenger
compartment of the vehicle could
cause injury. In a sudden stop or
collision, loose equipment could
strike someone. Store all these in
the proper place.
Storing a Flat or Spare Tire and
Tools with a Screw in Fastener 1. Remove the extension bolt from the foam holder.

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2. Screw the extension bolt ontothe end of the spare tire stow
bolt by hand.
3. Replace the foam, jack, and tools in their original storage
location.
4. Remove the insulator pad, if equipped, and place it over
the foam holder to protect the
wheel of the flat tire from
the jack.
5. Place the tire over the extension bolt facing up.
6. Turn the retainer nut clockwise to secure the tire. 7. Place the floor cover on the
wheel.
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
{Warning
Driving with more than one
compact spare tire at a time could
result in loss of braking and
handling. This could lead to a
crash and you or others could be
injured. Use only one compact
spare tire at a time.
If this vehicle has a compact spare
tire, it was fully inflated when new;
however, it can lose air over time.
Check the inflation pressure
regularly. It should be 420 kPa
(60 psi).
Stop as soon as possible and check
that the spare tire is correctly
inflated after being installed on the vehicle. The compact spare tire is
designed for temporary use only.
The vehicle will perform differently
with the spare tire installed and it is
recommended that the vehicle
speed be limited to 80 km/h
(50 mph). To conserve the tread of
the spare tire, have the standard tire
repaired or replaced as soon as
convenient and return the spare tire
to the storage area.
When using a compact spare tire,
the AWD (if equipped), ABS, and
Traction Control systems may
engage until the spare tire is
recognized by the vehicle,
especially on slippery roads. Adjust
driving to reduce possible
wheel slip.
Caution
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.

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Index 381
Steering . . . . . . . . . . . . . . . . . . . . . . . . 178Heated Wheel . . . . . . . . . . . . . . . . .118
Wheel Adjustment . . . . . . . . . . . . .118
Wheel Controls . . . . . . . . . . . . . . . .118
Stoplamps and Back-up Lamps Bulb Replacement . . . . . . . . . . . . 266
Storage Areas
Armrest . . . . . . . . . . . . . . . . . . . . . . . .114
Cargo Cover . . . . . . . . . . . . . . . . . . .114
Convenience Net . . . . . . . . . . . . . .116
Front . . . . . . . . . . . . . . . . . . . . . . . . . .113
Glove Box . . . . . . . . . . . . . . . . . . . . .112
Sunglasses . . . . . . . . . . . . . . . . . . . .113
Storage Compartments . . . . . . . . . 112
Storing the Tire Sealant and Compressor Kit . . . . . . 308, 309
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 182
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 57
Sunglass Storage . . . . . . . . . . . . . . . 113
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Forward Collision
Alert (FCA) . . . . . . . . . . . . . . . . . . 217 System (cont'd)
Infotainment . . . . . . . . . . . . . 167, 359
Systems Driver Assistance . . . . . . . . . . . . . 213
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 128
Taillamps
Bulb Replacement . . . . . . . . . . . . 266
Text Telephone (TTY) Users . . . . 349
Theft-Deterrent Systems . . . . . . . . . 52
Immobilizer . . . . . . . . . . . . . . . . . . . . . 51
Thigh Support Adjustment . . . . . . . 64
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274 All-Season . . . . . . . . . . . . . . . . . . . . 275
Buying New Tires . . . . . . . . . . . . . 289
Chains . . . . . . . . . . . . . . . . . . . . . . . . 293
Changing . . . . . . . . . . . . . . . . . . . . . 309
Compact Spare . . . . . . . . . . . . . . . 314
Designations . . . . . . . . . . . . . . . . . 278
Different Size . . . . . . . . . . . . . . . . . 290
If a Tire Goes Flat . . . . . . . . . . . . 294
Inspection . . . . . . . . . . . . . . . . . . . . 287
Low Profile . . . . . . . . . . . . . . . . . . . 275
Pressure . . . . . . . . . . . . . . . . . 281, 282
Pressure Light . . . . . . . . . . . . . . . . 138
Pressure Monitor Operation . . 284 Tires (cont'd)
Pressure Monitor System . . . . . 283
Rotation . . . . . . . . . . . . . . . . . . . . . . 287
Sealant and
Compressor Kit . . . . . . . . 296, 302
Sealant and Compressor Kit,
Storing . . . . . . . . . . . . . . . . . 308, 309
Sidewall Labeling . . . . . . . . . . . . . 276
Terminology and Definitions . . 278
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 291
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 292
Wheel Replacement . . . . . . . . . . 293
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 288
Winter . . . . . . . . . . . . . . . . . . . . . . . . 275
Towing Driving Characteristics . . . . . . . . 231
Equipment . . . . . . . . . . . . . . . . . . . . 237
General Information . . . . . . . . . . 231
Recreational Vehicle . . . . . . . . . . 318
Trailer . . . . . . . . . . . . . . . . . . . . . . . . 235
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 318
Traction Control System (TCS)/StabiliTrak Light . . . . . . . . . . . . . 137

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382 Index
Traction (cont'd)Off Light . . . . . . . . . . . . . . . . . . . . . . 137
Selective Ride Control . . . . . . . . 203
Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . . 201
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . 235
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . 194
Fluid, Automatic . . . . . . . . . . . . . . 250
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . . 352
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 162
Turn Signal Bulb Replacement . . . . . . . . . . . . 266
U
Uniform Tire Quality Grading . . . 291
Universal Remote System . . . . . . 155Operation . . . . . . . . . . . . . . . . . . . . . 157
Programming . . . . . . . . . . . . . . . . . 155
Using This Manual . . . . . . . . . . . . . . . . 2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 50
Canadian Owners . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . 177 Vehicle (cont'd)
Identification Number (VIN) . . . 343
Load Limits . . . . . . . . . . . . . . . . . . . 183
Messages . . . . . . . . . . . . . . . . . . . . 149
Personalization . . . . . . . . . . . . . . . 150
Remote Start . . . . . . . . . . . . . . . . . . . 36
Security . . . . . . . . . . . . . . . . . . . . . . . . 50
Speed Messages . . . . . . . . . . . . . 150
Towing . . . . . . . . . . . . . . . . . . . . . . . . 318
Vehicle Ahead Indicator . . . . . . . . 136
Vehicle Care Storing the TireSealant and
Compressor Kit . . . . . . . . 308, 309
Tire Pressure . . . . . . . . . . . . . . . . . 281
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . . . . . . . . . . 358
Ventilation, Air . . . . . . . . . . . . . . . . . . 173
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
W
Warning
Brake System Light . . . . . . . . . . . 135
Caution and Danger . . . . . . . . . . . . . 2
Lane Departure (LDW) . . . . . . . 225
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . 123 Warnings
Hazard Flashers . . . . . . . . . . . . . . 162
Washer Fluid . . . . . . . . . . . . . . . . . . . 257
Wheels Alignment and Tire Balance . . 292
Different Size . . . . . . . . . . . . . . . . . 290
Replacement . . . . . . . . . . . . . . . . . 293
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Where to Put the Restraint . . . . . . 97
Wi-Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Windows . . . . . . . . . . . . . . . . . . . . . . . . 55 Power . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Windshield Replacement . . . . . . . . . . . . . . . . . 263
Wiper/Washer . . . . . . . . . . . . . . . . .118
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . 181
Winter Tires . . . . . . . . . . . . . . . . . . . . 275
Wiper Blade Replacement . . . . . . 262
Wipers Rear Washer . . . . . . . . . . . . . . . . . .119
Wireless Charging . . . . . . . . . . . . . . 121