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EnglishVehicle Care -> Wheels and Tires for your Chevrolet Silverado 1500 2018-2025
Vehicle Care
369
for information regarding the tire
Fuses
F33
Usage
Fuses
F57
Usage
warranty and where to get service. For
additional information refer to the tire
manufacturer.
Body Control Module 4
DC/DC Converter Battery 2
F34
F40
F41
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F58
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Circuit
Breakers
Usage
Warning
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Poorly maintained and improperly
used tires are dangerous.
F42
F43
F44
F45
F46
F47
F48
Electric Park Brake Switch
1
2
3
4
Accessory Power Outlet 1
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Overloading the tires can cause
overheating as a result of too
much flexing. There could be a
blowout and a serious crash. See
Vehicle Load Limits 0 204.
Shifter Interface Board
Radio Low
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Relays
K1
Usage
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Underinflated tires pose the same
danger as overloaded tires. The
resulting crash could cause serious
injury. Check all tires frequently to
maintain the recommended
pressure. Tire pressure should be
checked when the tires are cold.
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Transmission Control
Module
K2
Retained Accessory Power/
Accessory 1
F49
F50
F51
Body Control Module 1
K4
K5
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Battery 1
F52
F53
F54
F55
F56
Battery 2
Overinflated tires are more likely
to be cut, punctured, or broken by
a sudden impact — such as when
hitting a pothole. Keep tires at the
recommended pressure.
Wheels and Tires
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Tires
Sunroof
Driver Power Seat
DC/DC Converter Battery 1
Every new GM vehicle has high-quality
tires made by a leading tire
manufacturer. See the warranty manual
(Continued)
370
.
Vehicle Care
.
.
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.
equipment all-season tires can be identified
by the last two characters of this TPC code,
which will be “MS.”
Warning (Continued)
Worn or old tires can cause a
crash. If the tread is badly worn,
replace them.
Consider installing winter tires on the
vehicle if frequent driving on snow or
ice-covered roads is expected. All-season tires
provide adequate performance for most
winter driving conditions, but they may not
offer the same level of traction or
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. If winter tires with a lower speed
rating are chosen, never exceed the tire's
maximum speed capability.
.
Replace any tires that have been
damaged by impacts with
potholes, curbs, etc.
.
performance as winter tires on snow or
ice-covered roads. See Winter Tires 0 370.
Improperly repaired tires can cause
a crash. Only your dealer or an
authorized tire service center
should repair, replace, dismount,
and mount the tires.
Winter Tires
This vehicle was not originally equipped
with winter tires. Winter tires are designed
for increased traction on snow and
ice-covered roads. Consider installing winter
tires on the vehicle if frequent driving on ice
or snow covered roads is expected. See your
dealer for details regarding winter tire
availability and proper tire selection. Also,
see Buying New Tires 0 383.
All-Terrain Tires
This vehicle may have all-terrain or
mud-terrain tires. These tires provide good
performance on most road surfaces, weather
conditions, and for off-road driving. See
Off-Road Driving 0 197.
.
Do not spin the tires in excess of
56 km/h (35 mph) on slippery
surfaces such as snow, mud, ice,
etc. Excessive spinning may cause
the tires to explode.
The tread pattern on these tires may wear
more unevenly than other tires. Consider
rotating the tires more frequently than at
12 000 km (7,500 mi) intervals if irregular
wear is noted when the tires are inspected.
See Tire Inspection 0 381.
All-Season Tires
With winter tires, there may be decreased
dry road traction, increased road noise, and
shorter tread life. After changing to winter
tires, be alert for changes in vehicle
handling and braking.
This vehicle may come with all-season tires.
These tires are designed to provide good
overall performance on most road surfaces
and weather conditions. Original equipment
tires designed to GM's specific tire
performance criteria have a TPC specification
code molded onto the sidewall. Original
If using winter tires:
Vehicle Care
371
(2) TPC Spec (Tire Performance Criteria
Specification) : Original equipment tires
designed to GM's specific tire
manufacturer and plant code, tire size,
and date the tire was manufactured.
The TIN is molded onto both sides of
the tire, although only one side may
have the date of manufacture.
Tire Sidewall Labeling
Useful information about a tire is
molded into its sidewall. The examples
show a typical passenger vehicle tire/
full size spare tire, and light truck tire
sidewall.
performance criteria have a TPC
specification code molded onto the
sidewall. GM's TPC specifications meet
or exceed all federal safety guidelines.
(5) Tire Ply Material : The type of cord
and number of plies in the sidewall and
under the tread.
(3) DOT (Department of
Transportation) : The Department of
Transportation (DOT) code indicates that
the tire is in compliance with the U.S.
Department of Transportation Motor
Vehicle Safety Standards.
(6) 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, see Uniform Tire
Quality Grading 0 385.
DOT Tire Date of Manufacture : The last
four digits of the TIN indicate the tire
manufactured date. The first two digits
represent the week and the last two
digits, the year. For example, the third
week of the year 2020 would have a
4-digit DOT date of 0320. Week 01 is
the first full week (Sunday through
Saturday) of each year.
(7) Maximum Cold Inflation Load
Limit : Maximum load that can be
carried and the maximum pressure
needed to support that load. For
information on recommended tire
pressure see Tire Pressure 0 375 and
Vehicle Load Limits 0 204.
Passenger Tire/Spare Tire
(1) Tire Size : The tire size code is a
combination of letters and numbers
used to define a particular tire's width,
height, aspect ratio, construction type,
and service description. See the “Tire
Size” illustration in this section.
(4) Tire Identification Number (TIN) :
The letters and numbers following the
DOT code are the Tire Identification
Number (TIN). The TIN shows the
(8) Temporary Use Only : Only use a
temporary spare tire until the road tire
is repaired and replaced. This spare tire
should not be driven on over 112 km/h
372
Vehicle Care
(70 mph), or 88 km/h (55 mph) when
pulling a trailer, with the proper
inflation pressure. See Full-Size Spare
Tire 0 398.
specification code molded onto the
sidewall. GM's TPC specifications meet
or exceed all federal safety guidelines.
(5) Tire Identification Number (TIN) :
The letters and numbers following the
DOT code are the Tire Identification
Number (TIN). The TIN shows the
manufacturer and plant code, tire size,
and date the tire was manufactured.
The TIN is molded onto both sides of
the tire, although only one side may
have the date of manufacture.
(3) Dual Tire Maximum Load :
Maximum load that can be carried and
the maximum pressure needed to
support that load when used in a dual
configuration. For information on
recommended tire pressure see Tire
Pressure 0 375 and
(6) Tire Ply Material : The type of cord
and number of plies in the sidewall and
under the tread.
Vehicle Load Limits 0 204.
(4) DOT (Department of
Transportation) : The Department of
Transportation (DOT) code indicates that
the tire is in compliance with the U.S.
Department of Transportation Motor
Vehicle Safety Standards.
(7) Single Tire Maximum Load :
Maximum load that can be carried and
the maximum pressure needed to
support that load when used as a
single. For information on
recommended tire pressure see Tire
Pressure 0 375 and
Light Truck (LT-Metric) Tire
(1) Tire Size : The tire size code is a
combination of letters and numbers
used to define a particular tire's width,
height, aspect ratio, construction type,
and service description. See the “Tire
Size” illustration in this section.
DOT Tire Date of Manufacture : The last
four digits of the TIN indicate the tire
manufactured date. The first two digits
represent the week and the last two
digits, the year. For example, the third
week of the year 2020 would have a
4-digit DOT date of 0320. Week 01 is
the first full week (Sunday through
Saturday) of each year.
Vehicle Load Limits 0 204.
Tire Designations
Tire Size
(2) TPC Spec (Tire Performance Criteria
Specification) : Original equipment tires
designed to GM's specific tire
The examples show a typical passenger
vehicle and light truck tire size.
performance criteria have a TPC
Vehicle Care
373
(4) 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.
light truck tire engineered to standards
set by the U.S. Tire and Rim
Association.
(2) Tire Width : The 3-digit number
indicates the tire section width in
millimeters from sidewall to sidewall.
Passenger (P-Metric) Tire
(5) Rim Diameter : Diameter of the
wheel in inches.
(3) Aspect Ratio : A 2-digit number that
indicates the tire height-to-width
measurements. For example, if the tire
size aspect ratio is 75, as shown in
item (3) of the light truck (LT-Metric)
tire illustration, it would mean that the
tire's sidewall is 75 percent as high as it
is wide.
(1) Passenger (P-Metric) Tire : The
United States version of a metric tire
sizing system. The letter P as the first
character in the tire size means a
passenger vehicle tire engineered to
standards set by the U.S. Tire and Rim
Association.
(6) Service Description : These
characters represent the load index and
speed rating of the tire. The load index
represents the load carrying capacity a
tire is certified to carry. The speed
rating is the maximum speed a tire is
certified to carry a load.
(2) Tire Width : The 3-digit number
indicates the tire section width in
millimeters from sidewall to sidewall.
(4) 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.
(3) Aspect Ratio : A 2-digit number that
indicates the tire height-to-width
measurements. For example, if the tire
size aspect ratio is 75, as shown in
item (3) of the illustration, it would
mean that the tire's sidewall is
(5) Rim Diameter : Diameter of the
wheel in inches.
Light Truck (LT-Metric) Tire
(1) Light Truck (LT-Metric) Tire : The
United States version of a metric tire
sizing system. The letters LT as the first
two characters in the tire size mean a
(6) Load Range : Load Range.
75 percent as high as it is wide.
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Vehicle Care
(7) Service Description : The service
description indicates the load index and
speed rating of a tire. If two numbers
are given as in the example, 120/116,
then this represents the load index for
single versus dual wheel usage (single/
dual). The speed rating is the maximum
speed a tire is certified to carry a load.
Bias Ply Tire : A pneumatic tire in which
the plies are laid at alternate angles
less than 90 degrees to the centerline
of the tread.
GAWR RR : Gross Axle Weight Rating
for the rear axle. See Vehicle Load
Limits 0 204.
Intended Outboard Sidewall : The side
of an asymmetrical tire, that must
always face outward when mounted on
a vehicle.
Cold Tire Pressure : The amount of air
pressure in a tire, measured in kPa
(kilopascal) or psi (pounds per square
inch) before a tire has built up heat
from driving. See Tire Pressure 0 375.
Kilopascal (kPa) : The metric unit for air
pressure.
Tire Terminology and Definitions
DOT Markings : A code molded into the
sidewall of a tire signifying that the tire
is in compliance with the U.S.
Department of Transportation (DOT)
Motor Vehicle Safety Standards. The
DOT code includes the Tire Identification
Number (TIN), an alphanumeric
designator which can also identify the
tire manufacturer, production plant,
brand, and date of production.
Air Pressure : The amount of air inside
the tire pressing outward on each
square inch of the tire. Air pressure is
expressed in kPa (kilopascal) or psi
(pounds per square inch).
Light Truck (LT-Metric) Tire : A tire used
on light duty trucks and some
multipurpose passenger vehicles.
Load Index : An assigned number
ranging from 1 to 279 that corresponds
to the load carrying capacity of a tire.
Aspect Ratio : The relationship of a
tire's height to its width.
Maximum Inflation Pressure : The
maximum air pressure to which a cold
tire can be inflated. The maximum air
pressure is molded onto the sidewall.
Belt : A rubber coated layer of cords
that is located between the plies and
the tread. Cords may be made from
steel or other reinforcing materials.
GVWR : Gross Vehicle Weight Rating.
See Vehicle Load Limits 0 204.
Maximum Load Rating : The load rating
for a tire at the maximum permissible
inflation pressure for that tire.
Bead : The tire bead contains steel
wires wrapped by steel cords that hold
the tire onto the rim.
GAWR FRT : Gross Axle Weight Rating
for the front axle. See Vehicle Load
Limits 0 204.
Occupant Distribution : Designated
seating positions.
Vehicle Care
375
Outward Facing Sidewall : The side of
an asymmetrical tire that has a
particular side that faces outward when
mounted on a vehicle. The side of the
tire that contains a whitewall, bears
white lettering, or bears manufacturer,
brand, and/or model name molding
that is higher or deeper than the same
moldings on the other sidewall of
the tire.
Sidewall : The portion of a tire between
the tread and the bead.
Vehicle Capacity Weight : The number
of designated seating positions
multiplied by 68 kg (150 lbs) plus the
rated cargo load. See Vehicle Load
Limits 0 204.
Speed Rating : An alphanumeric code
assigned to a tire indicating the
maximum speed at which a tire can
operate.
Vehicle Maximum Load on the Tire :
Load on an individual tire due to curb
weight, accessory weight, occupant
weight, and cargo weight.
Traction : The friction between the tire
and the road surface. The amount of
grip provided.
Vehicle Placard : A label permanently
attached to a vehicle showing the
vehicle's capacity weight and the
original equipment tire size and
recommended inflation pressure. See
“Tire and Loading Information Label”
under Vehicle Load Limits 0 204.
Tread : The portion of a tire that comes
into contact with the road.
Passenger (P-Metric) Tire : A tire used
on passenger cars and some light duty
trucks and multipurpose vehicles.
Treadwear Indicators : Narrow bands,
sometimes called wear bars, that show
across the tread of a tire when only
1.6 mm (1/16 in) of tread remains. See
When It Is Time for New Tires 0 383.
Recommended Inflation Pressure :
Vehicle manufacturer's recommended
tire inflation pressure as shown on the
tire placard. See Tire Pressure 0 375 and
Vehicle Load Limits 0 204.
Tire Pressure
Tires need the correct amount of air
pressure to operate effectively.
UTQGS (Uniform Tire Quality Grading
Standards) : A tire information system
that provides consumers with ratings
for a tire's traction, temperature, and
treadwear. Ratings are determined by
tire manufacturers using government
testing procedures. The ratings are
molded into the sidewall of the tire.
See Uniform Tire Quality Grading 0 385.
Radial Ply Tire : A pneumatic tire in
which the ply cords that extend to the
beads are laid at 90 degrees to the
centerline of the tread.
Rim : A metal support for a tire and
upon which the tire beads are seated.
376
Vehicle Care
Warning
The Tire and Loading Information label
on the vehicle indicates the original
equipment tires and the correct cold
tire inflation pressures. The
recommended pressure is the minimum
air pressure needed to support the
vehicle's maximum load carrying
capacity.
How to Check
{
Use a good quality pocket-type gauge
to check tire pressure. Proper tire
inflation cannot be determined by
looking at the tire. Check the tire
inflation pressure when the tires are
cold, meaning the vehicle has not been
driven for at least three hours or no
more than 1.6 km (1 mi).
Neither tire underinflation nor
overinflation is good. Underinflated
tires, or tires that do not have
enough air, can result in:
.
Tire overloading and overheating,
which could lead to a blowout
For additional information regarding
how much weight the vehicle can carry,
and an example of the Tire and Loading
Information label, see Vehicle Load
Limits 0 204. How the vehicle is loaded
affects vehicle handling and ride
comfort. Never load the vehicle with
more weight than it was designed to
carry.
.
.
.
Premature or irregular wear
Poor handling
Remove the valve cap from the tire
valve stem. Press the tire gauge firmly
onto the valve to get a pressure
measurement. If the cold tire inflation
pressure matches the recommended
pressure on the Tire and Loading
Information label, no further adjustment
is necessary. If the inflation pressure is
low, add air until the recommended
pressure is reached. If the inflation
pressure is high, press on the metal
stem in the center of the tire valve to
release air.
Reduced fuel economy for
internal combustion engine
vehicles
.
Reduced range for electric vehicles
Overinflated tires, or tires that have
too much air, can result in:
When to Check
.
.
.
.
Unusual wear
Poor handling
Rough ride
Check the pressure of the tires once a
month or more.
Do not forget the spare, if the vehicle
has one. See Full-Size Spare Tire 0 398
for additional information.
Needless damage from road
hazards
Re-check the tire pressure with the tire
gauge.
Vehicle Care
377
As an added safety feature, your vehicle has
been equipped with a tire pressure
monitoring system (TPMS) that illuminates a
low tire pressure telltale when one or more
of your tires is significantly under-inflated.
sequence will continue upon subsequent
vehicle start-ups as long as the malfunction
exists.
Put the valve caps back on the valve
stems to keep out dirt and moisture.
Use only valve caps designed for the
vehicle by GM. TPMS sensors could be
damaged and would not be covered by
the vehicle warranty.
When the malfunction indicator is
illuminated, the system may not be able to
detect or signal low tire pressure as
intended. TPMS malfunctions may occur for
a variety of reasons, including the
installation of replacement or alternate tires
or wheels on the vehicle that prevent the
TPMS from functioning properly. Always
check the TPMS malfunction telltale after
replacing one or more tires or wheels on
your vehicle to ensure that the replacement
or alternate tires and wheels allow the
TPMS to continue to function properly.
Accordingly, when the low tire pressure
telltale illuminates, you should stop and
check your tires as soon as possible, and
inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes
the tire to overheat and can lead to tire
failure. Under-inflation also reduces energy
efficiency and tire tread life, and may affect
the vehicle's handling and stopping ability.
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS)
uses radio and sensor technology to check
tire pressure levels. The TPMS sensors
monitor the air pressure in your tires and
transmit tire pressure readings to a receiver
located in the vehicle.
Please note that the TPMS is not a
substitute for proper tire maintenance, and
it is the driver's responsibility to maintain
correct tire pressure, even if under-inflation
has not reached the level to trigger
illumination of the TPMS low tire pressure
telltale.
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure
recommended by the vehicle manufacturer
on the vehicle placard or tire inflation
pressure label. (If your vehicle has tires of a
different size than the size indicated on the
vehicle placard or tire inflation pressure
label, you should determine the proper tire
inflation pressure for those tires.)
See Tire Pressure Monitor Operation 0 377.
See Radio Frequency Statement 0 438.
Tire Pressure Monitor Operation
This vehicle may have a Tire Pressure
Monitor System (TPMS). The TPMS is
designed to warn the driver when a low tire
pressure condition exists. TPMS sensors are
mounted onto each tire and wheel
assembly, excluding the spare tire and
wheel assembly. The TPMS sensors monitor
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined
with the low tire pressure telltale. When the
system detects a malfunction, the telltale
will flash for approximately one minute and
then remain continuously illuminated. This
378
Vehicle Care
the air pressure in the tires and transmit the
tire pressure readings to a receiver located
in the vehicle.
displays, see Driver Information Center (DIC)
(Base Level) 0 127 or
Driver Information Center (DIC) (Uplevel)
0 128.
Caution (Continued)
sealant is not covered by the vehicle
warranty. Always use only the GM
approved tire sealant available through
your dealer or included in the vehicle.
The low tire pressure warning light may
come on in cool weather when the vehicle is
first started, and then turn off as the vehicle
is driven. This could be an early indicator
that the air pressure is getting low and
needs to be inflated to the proper pressure.
TPMS Malfunction Light and Message
The TPMS will not function properly if one
or more of the TPMS sensors are missing or
inoperable. When the system detects a
malfunction, the low tire pressure warning
light flashes for about one minute and then
stays on for the remainder of the ignition
cycle. A DIC warning message also displays.
The malfunction light and DIC warning
message come on at each ignition cycle
until the problem is corrected. Some of the
conditions that can cause these to come
on are:
One of the road tires has been replaced
with the spare tire. The spare tire does
not have a TPMS sensor. The malfunction
light and the DIC message should go off
after the road tire is replaced and the
sensor matching process is performed
successfully. See "TPMS Sensor Matching
Process" later in this section.
When a low tire pressure condition is
detected, the TPMS illuminates the low tire
pressure warning light located on the
instrument cluster. If the warning light
comes on, stop as soon as possible and
inflate the tires to the recommended
pressure shown on the Tire and Loading
Information label. See Vehicle Load Limits
0 204.
A Tire and Loading Information label shows
the size of the original equipment tires and
the correct inflation pressure for the tires
when they are cold. See Vehicle Load Limits
0 204, for an example of the Tire and
Loading Information label and its location.
Also see Tire Pressure 0 375.
The TPMS can warn about a low tire
pressure condition but it does not replace
normal tire maintenance. See Tire Inspection
0 381, Tire Rotation 0 382, and Tires 0 369.
A message to check the pressure in a
specific tire displays in the Driver
.
Information Center (DIC). The low tire
pressure warning light and the DIC
warning message come on at each
ignition cycle until the tires are inflated
to the correct inflation pressure. If the
vehicle has DIC buttons, tire pressure levels
can be viewed. For additional information
and details about the DIC operation and
Caution
Tire sealant materials are not all the
same. A non-approved tire sealant could
damage the TPMS sensors. TPMS sensor
damage caused by using an incorrect tire
(Continued)
Vehicle Care
379
.
The TPMS sensor matching process was
not done or not completed successfully
after rotating the tires. The malfunction
light and the DIC message should go off
after successfully completing the sensor
matching process. See "TPMS Sensor
Matching Process" later in this section.
One or more TPMS sensors are missing or
damaged. The malfunction light and the
DIC message should go off when the
TPMS sensors are installed and the sensor
matching process is performed
Tire Fill Alert (If Equipped)
Warning (Continued)
This feature provides visual and audible
alerts outside the vehicle to help when
inflating an underinflated tire to the
recommended cold tire pressure.
pressure listed on the tire sidewall. See
Tire Sidewall Labeling 0 371 and
Vehicle Load Limits 0 204.
When the low tire pressure warning light
comes on:
If the tire is overinflated by more than
.
.
.
35 kPa (5 psi), the horn will sound multiple
times and the turn signal lamp will continue
to flash for several seconds after filling
stops. To release and correct the pressure,
while the turn signal lamp is still flashing,
briefly press the center of the valve stem.
When the recommended pressure is reached,
the horn sounds once.
1. Park the vehicle in a safe, level place.
2. Set the parking brake firmly.
3. Place the vehicle in P (Park).
4. Add air to the tire that is underinflated.
The turn signal lamp will flash.
successfully. See your dealer for service.
Replacement tires or wheels do not match
the original equipment tires or wheels.
Tires and wheels other than those
recommended could prevent the TPMS
from functioning properly. See Buying
New Tires 0 383.
Operating electronic devices or being near
facilities using radio wave frequencies
similar to the TPMS could cause the TPMS
sensors to malfunction.
When the recommended pressure is
reached, the horn sounds once and the
turn signal lamp will stop flashing and
briefly turn solid.
If the turn signal lamp does not flash within
15 seconds after starting to inflate the tire,
the tire fill alert has not been activated or is
not working.
Repeat these steps for all underinflated tires
that have illuminated the low tire pressure
warning light.
If the hazard warning flashers are on, the
tire fill alert visual feedback will not work
properly.
Warning
{
The TPMS will not activate the tire fill alert
properly under the following conditions:
There is interference from an external
device or transmitter.
The air pressure from the inflation device
is not sufficient to inflate the tire.
If the TPMS is not functioning properly, it
cannot detect or signal a low tire pressure
condition. See your dealer for service if the
TPMS malfunction light and DIC message
come on and stay on.
Overinflating a tire could cause the tire
to rupture and you or others could be
injured. Do not exceed the maximum
(Continued)
.
.
380
Vehicle Care
.
.
There is a malfunction in the TPMS.
There is a malfunction in the horn or turn
signal lamps.
The identification code of the TPMS
sensor is not registered to the system.
The battery of the TPMS sensor is low.
Driver Information Center (DIC) (Uplevel)
0 128. A warning message displays in the
DIC if a problem occurs during the relearn
process.
.
Trailer Tire Pressure Monitoring
Operation
.
If the tire fill alert does not operate due to
TPMS interference, move the vehicle about
1 m (3 ft) back or forward and try again.
If the tire fill alert feature is not working,
use a tire pressure gauge.
If equipped, the Trailer Tire Pressure
Monitoring System (TTPMS) is designed to
monitor the pressure of the trailer tires and
warn the driver when a low pressure
condition exists. TTPMS sensors for four tires
are provided. The system can accommodate
a trailer with up to six tires if additional
sensors are purchased from the dealer. Also,
the system can be paired with up to five
individual trailers.
TPMS Sensor Matching Process — Auto
Learn Function
Contact your trailer service center or tire
service center to have the pressure sensors
installed inside the trailer tires. The
technician should insert the sensor stem
through the hole in the trailer wheel. When
the sensor is correctly positioned, the nut on
the sensor stem should be tightened to
8 Y (6 lb ft). When mounting the trailer
tire onto the trailer wheel be careful not to
damage the sensor.
Each TPMS sensor has a unique
identification code. The identification code
needs to be matched to a new tire/wheel
position after rotating the tires or replacing
one or more of the TPMS sensors. When a
tire is installed, the vehicle must be
stationary for about 20 minutes before
the system recalculates. The following
relearn process takes up to 10 minutes,
driving at a minimum speed of 20 km/h
(12 mph). A dash (-) or pressure value will
display in the DIC. See Driver Information
Center (DIC) (Base Level) 0 127 or
Prior to use, the vehicle must learn the
sensors by following the learning process.
See Trailering App 0 319.
The Trailering App can be used to view the
tire pressures after the recommended trailer
tire pressures have been entered. Refer to
the trailer tire placard on the trailer or the
trailer tire sidewall for the recommended
tire pressure.
Vehicle Care
381
The system is compatible with trailer tires
that have placard pressure values from 103 -
689 kpa (15 - 100 psi). The hole in the wheel
for the tire stem must be either 11.43 mm
(0.453 in) or 15.88 mm (0.625 in) in
diameter. Use of the pressure sensors on a
wheel with a different stem hole size could
result in loss of air from the tire.
performed successfully. See "TTPMS
Sensor Learning Process" under Trailering
App 0 319.
Operating electronic devices or being near
facilities using radio wave frequencies
similar to the TTPMS could cause
interference to the TTPMS which could
cause loss of signal reception from the
sensor.
If the system does not receive the signal
from an individual sensor, an error
message may not occur until the vehicle
has been driver for a period of time.
TTPMS Malfunction Message
The TTPMS will not function properly if one
or more of the trailer tire sensors are
missing or inoperable. If the system detects
a malfunction, a DIC message indicates that
the system requires service. Some of the
conditions that can cause the service
message to occur are:
.
.
If a low trailer tire pressure condition is
detected, the TTPMS displays a warning
message on the DIC. If the warning message
is displayed, stop as soon as possible and
inflate the tires to the recommended
pressure shown on the tire placard on the
trailer.
.
One of the trailer tires has been replaced
with the spare tire which does not have a
learned TTPMS sensor. The DIC message
should turn off after the pressure sensor
is installed in the tire, and the learning
process is performed successfully. See
"TTPMS Sensor Learning Process" under
Trailering App 0 319.
If the TTPMS is not functioning properly, it
cannot detect or signal a low tire condition.
See your dealer for service if the DIC
message comes on and stays on when the
trailer tire pressures have been checked and
determined to be correct.
In addition, the TTPMS monitors the
temperature of the trailer tires. If the
system detects a high temperature on one
or more of the trailer tires, a warning
message will be displayed on the DIC. If this
warning message is displayed, stop as soon
as possible, and inspect the overheated
trailer tire. Common causes for high trailer
tire temperature are underinflation,
overloading, or tire damage.
.
.
The TTPMS sensor learning process was
not done or not completed successfully.
The DIC message should go off after
successfully completing the sensor
learning process. See "TTPMS Sensor
Learning Process" under Trailering App
0 319.
One or more TTPMS sensors are missing
or damaged. The DIC message should go
off when the TTPMS sensors are installed
and the sensor learning process is
Tire Inspection
We recommend that the tires, including
the spare tire, if the vehicle has one, be
inspected for signs of wear or damage
at least once a month.
Replace the tire if:
.
The indicators at three or more
places around the tire can be seen.
382
Vehicle Care
.
There is cord or fabric showing
through the tire's rubber.
The tread or sidewall is cracked, cut,
or snagged deep enough to show
cord or fabric.
See When It Is Time for New Tires
0 383 and
Wheel Replacement 0 386.
Reset the Tire Pressure Monitor System.
See Tire Pressure Monitor Operation
0 377.
.
Check that all wheel nuts are properly
tightened. See “Wheel Nut Torque”
under Capacities and Specifications
0 426 and “Removing the Flat Tire and
Installing the Spare Tire” under Tire
Changing 0 389.
.
.
The tire has a bump, bulge, or split.
The tire has a puncture, cut, or other
damage that cannot be repaired well
because of the size or location of the
damage.
Warning
{
Tire Rotation
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
cause wheel nuts to become loose
over time. The wheel could come off
and cause a crash. When changing a
wheel, remove any rust or dirt from
places where the wheel attaches to
the vehicle. In an emergency, a cloth
or paper towel can be used; however,
use a scraper or wire brush later to
remove all rust or dirt.
Tires should be rotated according to the
interval listed in the maintenance
schedule. See Maintenance Schedule
0 417.
Use this rotation pattern when rotating
the tires.
Tires are rotated to achieve a more
uniform wear for all tires. The first
rotation is the most important.
Do not include the spare tire in the tire
rotation.
Adjust the front and rear tires to the
recommended inflation pressure on the
Tire and Loading Information label after
the tires have been rotated. See Tire
Pressure 0 375 and
Anytime unusual wear is noticed, rotate
the tires as soon as possible, check for
proper tire inflation pressure, and check
for damaged tires or wheels. If the
unusual wear continues after the
Vehicle Load Limits 0 204.
rotation, check the wheel alignment.
Vehicle Care
383
Number (TIN) molded into one side of the
tire sidewall. The last four digits of the TIN
indicate the tire manufactured date. The
first two digits represent the week and the
last two digits, the year. For example, the
third week of the year 2020 would have a
4-digit DOT date of 0320. Week 01 is the
first full week (Sunday through Saturday) of
each year.
Lightly coat the inner diameter of the
wheel hub opening with wheel bearing
grease after a wheel change or tire
rotation to prevent corrosion or rust
build-up.
Warning
{
Do not apply grease to the wheel
mounting surface, wheel conical
seats, or the wheel nuts or bolts.
Grease applied to these areas could
cause a wheel to become loose or
come off, resulting in a crash.
Vehicle Storage
Tires age when stored normally mounted on
a parked vehicle. Park a vehicle that will be
stored for at least a month in a cool, dry,
clean area away from direct sunlight to slow
aging. This area should be free of grease,
gasoline, or other substances that can
deteriorate rubber.
Treadwear indicators are one way to tell
when it is time for new tires. Treadwear
indicators appear when the tires have only
1.6 mm (1/16 in) or less of tread remaining.
See Tire Inspection 0 381 and
When It Is Time for New Tires
Factors, such as maintenance, temperatures,
driving speeds, vehicle loading, and road
conditions affect the wear rate of the tires.
Tire Rotation 0 382.
Parking for an extended period can cause
flat spots on the tires that may result in
vibrations while driving. When storing a
vehicle for at least a month, remove the
tires or raise the vehicle to reduce the
weight from the tires.
The rubber in tires ages over time. This also
applies to the spare tire, if the vehicle has
one, even if it is never used. Multiple factors
including temperatures, loading conditions,
and inflation pressure maintenance affect
how fast aging takes place. GM recommends
that tires, including the spare if equipped,
be replaced after six years, regardless of
tread wear. To identify the age of a tire, use
the tire manufacture date, which is the last
four digits of the DOT Tire Identification
Buying New Tires
GM has developed and matched specific
tires for the vehicle. The original
equipment tires installed were designed
384
Vehicle Care
to meet General Motors Tire
replaced at the same time. If proper
rotation and maintenance have been
done, all four tires should wear out at
about the same time. However, if it is
necessary to replace only one axle set
of worn tires, place the new tires on
the rear axle. See Tire Rotation 0 382.
Warning
{
Performance Criteria Specification (TPC
Spec) system rating. When replacement
tires are needed, GM strongly
recommends buying tires with the same
TPC Spec rating.
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.
GM's exclusive TPC Spec system
considers over a dozen critical
Warning
{
specifications that impact the overall
performance of the 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 MS for mud and snow. See Tire
Sidewall Labeling 0 371 for additional
information.
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.
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
{
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.
Mixing tires of different sizes (other
than those originally installed on the
vehicle), brands, tread patterns,
GM recommends replacing worn tires in
complete sets of four. Uniform tread
depth on all tires will help to maintain
the performance of the vehicle. Braking
and handling performance may be
or types may cause loss of vehicle
control, resulting in a crash or other
vehicle damage. Use the correct size,
brand, and type of tire on all wheels.
The Tire and Loading Information label
indicates the original equipment tires
on the vehicle. See Vehicle Load Limits
0 204.
adversely affected if all the tires are not
Vehicle Care
385
Quality grades can be found where
Different Size Tires and Wheels
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.
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
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 control, electronic
stability control, or All-Wheel Drive, the
performance of these systems can also be
affected.
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
norm due to variations in driving habits,
service practices and differences in road
characteristics and climate.
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.
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.
See Buying New Tires 0 383 and
Accessories and Modifications 0 333.
386
Vehicle Care
such as troughs or ruts, is normal. If the
vehicle is vibrating when driving on a
smooth road, the tires and wheels may
need to be rebalanced. See your dealer for
proper diagnosis.
Traction
corresponds to a level of performance
which all passenger car tires must meet
under the Federal Motor Safety
The traction grades, from highest to
lowest, are AA, A, B, and C. Those
grades represent the tire's ability to
stop on wet pavement as measured
under controlled conditions on specified
government test surfaces of asphalt and
concrete. A tire marked C may have
poor traction performance. Warning:
The traction grade assigned to this tire
is based on straight-ahead braking
traction tests, and does not include
acceleration, cornering, hydroplaning,
or peak traction characteristics.
Standard No. 109. Grades B and A
represent higher levels of performance
on the laboratory test wheel than the
minimum required by law. Warning:
The temperature grade for this tire is
established for a tire that is properly
inflated and not overloaded. Excessive
speed, underinflation, or excessive
loading, either separately or in
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.
combination, can cause heat buildup
and possible tire failure.
Your dealer will know the kind of wheel that
is needed.
Wheel Alignment and Tire
Balance
The tires and wheels were aligned and
balanced at the factory to provide the
longest tire life and best overall
Temperature
Each new wheel should have the same
load-carrying capacity, diameter, width,
offset, and be mounted the same way as
the one it replaces.
The temperature grades are A (the
highest), B, and C, representing the
tire's resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled conditions
on a specified indoor laboratory test
wheel. Sustained high temperature can
cause the material of the tire to
Replace wheels, wheel bolts, wheel nuts,
or Tire Pressure Monitor System (TPMS)
sensors with new GM original equipment
parts.
performance. Adjustments to wheel
alignment and tire balancing are not
necessary on a regular basis. Consider an
alignment check if there is unusual tire wear
or the vehicle is significantly pulling to one
side or the other. Some slight pull to the
left or right, depending on the crown of the
road and/or other road surface variations
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure. The grade C
Vehicle Care
Caution
If the vehicle is equipped with a tire size
other than 275/50R22, 275/60R20,
387
Tire Chains
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, resulting in a
crash. Always use the correct wheel,
wheel bolts, and wheel nuts for
replacement.
Warning
{
If the vehicle has 275/50R22, 275/60R20,
LT265/60R20, LT265/70R17, LT275/65R18,
or LT275/70R18 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 cause loss of
control and a crash.
LT265/60R20, LT265/70R17, LT275/65R18,
or LT275/70R18 use tire chains only where
legal and only when necessary. Use
chains that are the proper size for the
tires. Install them on the tires of the rear
axle. Do not use chains on the tires of
the front 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.
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.
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 a Tire Goes Flat
Caution
It is unusual for a tire to blow out while
driving, especially if the tires are maintained
properly. See Tires 0 369. If air goes out of
a tire, it is much more likely to leak out
slowly. But if there ever is a blowout, here
are a few tips about what to expect and
what to do:
The wrong wheel can also cause
If traction devices are used, install them
on the rear tires.
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.
388
Vehicle Care
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.
Warning
Warning
{
{
Lifting a vehicle and getting under it to
do maintenance or repairs is dangerous
without the appropriate safety equipment
and training. If a jack is provided with
the vehicle, it is designed only for
changing a flat tire. If it is used for
anything else, you or others could be
badly injured or killed if the vehicle slips
off the jack. If a jack is provided with the
vehicle, only use it for changing a
flat tire.
Changing a tire can be dangerous. The
vehicle can slip off the jack and roll over
or fall causing injury or death. Find a
level place to change the tire. To help
prevent the vehicle from moving:
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.
1. Set the parking brake firmly.
2. Shift the vehicle to P (Park).
3. For vehicles with four-wheel drive
with an N (Neutral) transfer case
position, be sure the transfer case is
in a drive gear — not in N (Neutral).
If a tire goes flat, avoid further tire and
wheel damage by driving slowly to a level
place, well off the road, if possible. Turn on
the hazard warning flashers. See Hazard
Warning Flashers 0 141.
4. Turn off the engine and do not
restart while the vehicle is raised.
Warning
{
Driving on a flat tire will cause
permanent damage to the tire.
5. Do not allow passengers to remain
in the vehicle.
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 that has
been driven on while severely
underinflated or flat. Have your dealer or
an authorized tire service center repair or
replace the flat tire as soon as possible.
6. Place wheel blocks, if equipped, on
both sides of the tire at the opposite
corner of the tire being changed.
If your vehicle is loaded at or near
maximum cargo capacity, it may be difficult
to fit the jack under the vehicle due to the
environment (shoulder slope, road debris,
etc.). Removal of some weight may improve
the ability to fit the jack under the vehicle
at the correct jacking location.
Vehicle Care
389
When the vehicle has a flat tire (2), use the
following example as a guide to assist in the
placement of the wheel blocks (1),
if equipped.
2. Turn the wing nut counterclockwise to
remove the wheel blocks and the wheel
block retainer.
Tire Changing
Removing the Spare Tire and Tools
3. Turn the wing nut used to retain the
storage bag and tools counterclockwise
to remove it.
Use the jack handle extensions and the
wheel wrench to remove the
underbody-mounted spare tire.
1. Wheel Block (If Equipped)
2. Flat Tire
1. Jack
2. Jack Knob
The following information explains how to
use the jack and change a tire.
3. Tool Kit
4. Wing Nut Retaining Tool Kit
5. Wheel Blocks
6. Wing Nut Retaining Wheel Blocks
1. Spare Tire (Valve Stem Pointed Down)
2. Tire/Wheel Retainer
3. Hoist Cable
The equipment is under the second row
seats, if equipped, or behind the front row
seats on regular cab models.
4. Hoist Assembly
5. Hoist Shaft
6. Jack Handle Extensions
1. Turn the knob on the jack
counterclockwise to lower the jack head
to release the jack from its holder.
390
Vehicle Care
7. Wheel Wrench
8. Hoist Shaft Access Hole Cover
9. Hoist Shaft Access Hole
4. Insert the hoist end (open end) (10) of
the extension through the hole (9) in the
rear bumper.
10. Hoist End of Extension Tool
Do not use the chiseled end of the wheel
wrench.
1. Open the Hoist Shaft Access Hole Cover
on the rear bumper (8).
Be sure the hoist end of the
extension (10) connects to the hoist
shaft. The ribbed square end of the
extension is used to lower the spare tire.
5. Turn the wheel wrench counterclockwise
to lower the spare tire to the ground.
Continue to turn the wheel wrench until
the spare tire can be pulled out from
under the vehicle.
Spare Tire Cable (If Equipped)
3. If the vehicle is equipped with a spare
tire cable disconnect the cable from the
attachment on the frame by unclipping
it from the frame attachment bracket.
6. Pull the spare tire out from under the
vehicle.
2. Assemble the wheel wrench (7) and the
two jack handle extensions (6), as shown.
7. Tilt the tire toward the vehicle with
some slack in the cable to access the
tire/wheel retainer.
Vehicle Care
391
9. If equipped with a spare tire cable
remove the cable from the spare tire by
passing the clip through the looped end
of the cable.
The tools you will be using include the
jack (1), the wheel blocks (2), the jack
handle (3), the jack handle extensions (4),
and the wheel wrench (5).
1. Do a safety check before proceeding. See
If a Tire Goes Flat 0 387.
Removing the Flat Tire and Installing the
Spare Tire
Use the following pictures and instructions
to remove the flat tire and raise the vehicle.
Tilt the retainer and pull it through the
center of the wheel along with the cable
and spring.
8. Put the spare tire near the flat tire.
2. If the vehicle has wheel nut caps, loosen
them by turning the wheel wrench
counterclockwise.
1. Jack
2. Wheel Blocks
3. Jack Handle
4. Jack Handle Extensions
5. Wheel Wrench
If the vehicle has a center cap with
wheel nut caps, the wheel nut caps are
designed to stay with the center cap
after they are loosened. Remove the
entire center cap.
392
Vehicle Care
If the wheel has a smooth center cap,
concealing access to the wheel nuts,
place the chisel end of the wheel wrench
in the slot on the wheel, and gently pry
it out.
Front Position
3. Use the wheel wrench and turn it
counterclockwise to loosen the wheel
nuts. Do not remove the wheel nuts yet.
4. If the flat tire is on the front of the
vehicle, position the jack under the
bracket attached to the vehicle's frame,
behind the flat tire, as shown.
If the wheel’s center cap does not
conceal the wheel nuts, the center cap
may remain during wheel removal. If the
removed wheel is to be stowed in the
hoist, the cap needs to be detached from
the wheel. Access the wheel from the
back side, and use a jack handle
Warning
{
To avoid personal injury and vehicle
damage, disable the power assist steps
before using a jack or placing an object
under the vehicle. See Power Assist Steps
0 28.
extension to push out the center cap.
Vehicle Care
393
Warning
{
Raising the 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.
Warning
{
Rear Position
7. Remove all the wheel nuts and take off
the flat tire.
The jack has a feature to limit its travel
to prevent overextension. When the
height limit is reached, an increase in
resistance if felt when attempting to
raise the jack farther. Raising the jack
past the height limit can damage the jack
pin and cause the jack to lock into an
overextended position or not lower fully.
Do not attempt to force the jack higher
once the height limit is reached.
5. If the flat tire is on the rear, position the
jack under the rear axle about 5 cm
(2 in) inboard of the shock absorber
bracket.
Warning
{
Rust or dirt on a wheel, or on the
parts to which it is fastened, can
cause wheel nuts to become loose
over time. The wheel could come off
and cause a crash. When changing a
wheel, remove any rust or dirt from
places where the wheel attaches to
the vehicle. In an emergency, a cloth
or paper towel can be used; however,
use a scraper or wire brush later to
remove all rust or dirt.
Warning
{
Getting under a vehicle when it is lifted
on a jack 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.
6. Turn the wheel wrench clockwise to raise
the vehicle. Raise the vehicle far enough
off the ground so there is enough room
for the spare tire to fit under the
wheel well.
394
Vehicle Care
11. Tighten each wheel nut by hand. Then
use the wheel wrench to tighten the
nuts until the wheel is held against
the hub.
Warning
{
Wheel nuts that are improperly or
incorrectly tightened can cause the
wheels to become loose or come off. The
wheel nuts should be tightened with a
torque wrench to the proper torque
specification after replacing. Follow the
torque specification supplied by the
aftermarket manufacturer when using
accessory locking wheel nuts. See
Capacities and Specifications 0 426 for
original equipment wheel nut torque
specifications.
12. Turn the wheel wrench counterclockwise
to lower the vehicle. Lower the jack
completely.
Warning
{
If wheel studs are damaged, they can
break. If all the studs on a wheel broke,
the wheel could come off and cause a
crash. If any stud is damaged because of
a loose-running wheel, it could be that all
of the studs are damaged. To be sure,
replace all studs on the wheel. If the stud
holes in a wheel have become larger, the
wheel could collapse in operation. Replace
any wheel if its stud holes have become
larger or distorted in any way. Inspect
hubs and hub‐piloted wheels for damage.
Because of loose running wheels, piloting
pad damage may occur and require
8. Remove any rust or dirt from the wheel
bolts, mounting surfaces, and spare
wheel.
9. Install the spare tire.
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
Warning
{
Never use oil or grease on bolts or nuts
because the nuts might come loose. The
vehicle's wheel could fall off, causing a
crash.
Specifications 0 426 for the wheel nut
torque specification.
replacement of the entire hub, for proper
centering of the wheels. When replacing
studs, hubs, wheel nuts or wheels, be
sure to use GM original equipment parts.
10. Put the wheel nuts back on with the
rounded end of the nuts toward the
wheel.
Vehicle Care
Caution
395
Storing a Flat or Spare Tire and Tools
The tire hoist can be damaged if there is
no tension on the cable when using it. To
have the necessary tension, the spare or
road tire and wheel assembly must be
installed on the tire hoist to use it.
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.
Warning
{
13. Tighten the nuts firmly in a crisscross
sequence, as shown, by turning the
wheel wrench clockwise.
An improperly stored spare tire could
come loose and cause a crash. To avoid
personal injury or property damage,
always store the spare tire when the
vehicle is parked on a level surface.
Warning
{
When reinstalling the regular wheel and tire,
also reinstall either the center cap,
Failure to follow these tire storage
instructions carefully could result in
personal injury or property damage if the
hoist cable fails or if the tire comes loose.
Make sure the tire is stored securely
before driving.
or bolt-on hub cap, depending on what the
vehicle is equipped with. For center caps,
place the cap on the wheel and tap it into
place until it seats flush with the wheel. The
cap only goes on one way. Be sure to line
up the tab on the center cap with the
indentation on the wheel. For bolt-on hub
caps, align the plastic nut caps with the
wheel nuts and then tighten by hand. Then
use the wheel wrench to tighten.
Store the tire under the rear of the vehicle
in the spare tire carrier.
Caution
Storing an aluminum wheel with a flat
tire under your vehicle for an extended
period of time or with the valve stem
pointing up can damage the wheel.
Always stow the wheel with the valve
stem pointing down and have the wheel/
tire repaired as soon as possible.
396
Vehicle Care
cable through the looped end. The excess
cable wire should be on the valve stem
side of the spare tire.
2. Put the tire on the ground at the rear of
the vehicle with the valve stem pointed
down, and to the rear.
3. Pull the cable and spring through the
center of the wheel. Tilt the wheel
retainer plate down and through the
center wheel.
Make sure the retainer is fully seated
across the underside of the wheel.
11. Spare Tire Cable (If Equipped)
1. Spare Tire (Valve Stem Pointed Down)
2. Tire/Wheel Retainer
3. Hoist Cable
4. Hoist Assembly
5. Hoist Shaft
6. Jack Handle Extensions
7. Wheel Wrench
8. Hoist Shaft Access Hole Cover
9. Hoist Shaft Access Hole
10. Hoist End of Extension Tool
4. Attach the wheel wrench (7) and
extensions (6) together, as shown.
1. If equipped with a spare tire cable,
reinstall the cable to the spare wheel by
looping the cable around a wheel vent
window then pass the clip end of the
Vehicle Care
397
Caution
Use of an air wrench or other power
tools with the hoist mechanism is not
recommended and could damage the
system. Use only the tools supplied with
the hoist mechanism.
7. If equipped with a spare tire cable, orient
the cable by rotating the spare tire so
that the cable is by the frame
9. Make sure the tire is stored securely.
Push, pull, and then try to turn the tire.
If the tire moves, use the wheel wrench
to tighten the cable.
attachment location.
8. Raise the tire fully against the underside
of the vehicle by turning the wheel
wrench clockwise until you hear two
clicks or feel it skip twice. You cannot
overtighten the cable.
5. Insert the hoist end (10) through the
hole (9) in the rear bumper and onto the
hoist shaft.
Do not use the chiseled end of the wheel
wrench.
6. Raise the tire part way upward. Make
sure the retainer is seated in the wheel
opening.
398
Vehicle Care
If equipped with a spare tire cable,
reattach the clip to the frame
attachment bracket. Note that there may
be slack in the cable.
Full-Size Spare Tire
If this vehicle came with a full-size spare
tire, it was fully inflated when new,
however, it can lose air over time. Check the
inflation pressure regularly. See Tire Pressure
0 375 and Vehicle Load Limits 0 204 for
information regarding proper tire inflation
and loading the vehicle. For instructions on
how to remove, install, or store a spare tire,
see Tire Changing 0 389.
Repeat this tightness check procedure
when checking the spare tire pressure
according to the scheduled maintenance
information or any time the spare tire is
handled due to service of other
components.
After installing the spare tire on the vehicle,
stop as soon as possible and check that the
spare is correctly inflated. The spare tire is
made to perform well at speeds up to
112 km/h (70 MPH) at the recommended
inflation pressure, so you can finish
your trip.
Incorrectly Stored
10. Close the Hoist Shaft Access Hole Cover.
Have the damaged or flat road tire repaired
or replaced and installed back onto the
vehicle as soon as possible so the spare tire
will be available in case it is needed again.
Do not mix tires and wheels of different
sizes, because they will not fit. Keep the
spare tire and its wheel together.
Correctly Stored
Return the jack and tools to their original
location in the vehicle. See “Removing the
Spare Tire and Tools.”
Vehicle Care
Warning
399
pressure. Repair and replace the road tire as
soon as it is convenient, and stow the spare
tire for future use.
Caution
{
If the vehicle has four-wheel drive and a
different size spare tire is installed, do
not drive in four-wheel drive until the flat
tire is repaired and/or replaced. The
vehicle could be damaged and the repairs
would not be covered by the warranty.
Never use four-wheel drive when a
different size spare tire is installed on the
vehicle.
Batteries can hurt you. They can be
dangerous because:
Jump Starting
.
.
They contain acid that can burn you.
They contain gas that can explode or
ignite.
Jump Starting - North America
For more information about the vehicle
battery, see Battery - North America 0 352.
.
They contain enough electricity to
burn you.
If the vehicle's battery (or batteries) has run
down, you may want to use another vehicle
and some jumper cables to start your
vehicle. Be sure to use the following steps
to do it safely.
If you do not follow these steps exactly,
some or all of these things can hurt you.
The vehicle may have a different size spare
tire than the road tires originally installed
on the vehicle. This spare tire was developed
for use on this vehicle, so it is all right to
drive on it. If the vehicle has four-wheel
drive and a different size spare tire is
Caution
Ignoring these steps could result in costly
damage to the vehicle that would not be
covered by the vehicle warranty. Trying
to start the vehicle by pushing or pulling
it will not work, and it could damage the
vehicle.
Warning
{
WARNING: Battery posts, terminals and
related accessories can expose you to
chemicals including lead and lead
compounds, which are known to the
State of California to cause cancer and
birth defects or other reproductive harm.
Wash hands after handling. For more
information go to
installed, drive only in two-wheel drive.
If the vehicle has a spare tire that does not
match the original road tires and wheels in
size and type, do not include the spare in
the tire rotation.
Caution
If equipped with a temporary use full-size
spare tire, it is indicated on the tire sidewall.
See Tire Sidewall Labeling 0 371. This spare
tire should not be driven on over 112 km/h
(70 mph), or 88 km/h (55 mph) when
If the jumper cables are connected or
removed in the wrong order, electrical
shorting may occur and damage the
vehicle. The repairs would not be covered
(Continued)
See California Proposition 65 Warning 0 1.
pulling a trailer, at the proper inflation
