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2. Press the button (2) in the
middle of the wiper arm connector, and pull the wiper blade away from the arm connector (1).
3. Remove the wiper blade. 4. Reverse Steps 1–3 for wiper
blade replacement.
Headlamp Aiming Headlamp aim has been preset and should need no further adjustment. If the vehicle is damaged in a crash, the headlamp aim may be affected. If adjustment to the headlamps is necessary, see your dealer.
Vehicle Care
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Bulb Replacement
For the proper type of replacement
bulbs, see Replacement Bulbs
0 284
For any bulb-changing procedure
not listed in this section, contact
your dealer.
ii
Halogen Bulbs
{ Warning
Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.
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Vehicle Care
Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps
Driver Side
1. Low-Beam Headlamp 2. High-Beam Headlamp 3. Front Turn Signal/
Sidemarker/Parking Lamp See your dealer for passenger side replacement. Headlamp 1. Open the hood.
2. Remove the headlamp bulb
cover by turning it counterclockwise.
3. Turn the bulb socket
counterclockwise to remove it from the headlamp assembly and pull it straight out.
4. Unplug the electrical connector
from the old bulb by releasing the clip on the bulb socket.
Turn Signal/Sidemarker/ Parking Lamp 1. Open the hood. 2. Turn the bulb socket
counterclockwise to remove it from the headlamp assembly and pull it straight out.
3. Remove the bulb by pulling it straight out of the bulb socket.
Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps 1. Open the tailgate.
2. Remove the two rear lamp
assembly screws.
3. Pull the rear lamp assembly outboard away from the box side until the retainers release. There will be a noise when the retainers release.
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Center High-Mounted Stoplamp (CHMSL) and Cargo Lamp
4. Pull the rear lamp assembly
straight back to remove it from the vehicle.
5. Turn the bulb socket
counterclockwise.
6. Pull the bulb straight out from
the socket.
7. Replace the bulb, then insert the bulb socket into the rear lamp assembly and turn clockwise.
9. Verify the retainer ring is in the proper position. If the retainer ring is out of position, it will not engage. Reset the retainer by pulling it forward with a tool.
10. Push the rear lamp assembly
straight in until it is seated against the vehicle.
11. Make sure the rear lamp
assembly is flush with the box side.
12. Reinstall the two rear lamp
assembly screws.
1. Cargo Lamp Bulbs 2. Center High-Mounted
Stoplamp (CHMSL) Bulb
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Vehicle Care
To replace one of these bulbs:
Exterior Lamp
Bulb
Number
921 (W16W)
921LL
7443 W21/ 5W LL-T
9005 LL
H11 LL
7443 W21/ 5W LL-T
1157
Cargo Lamp Center High-Mounted Stoplamp (CHMSL) Front Turn Signal, Parking, and Sidemarker Lamp High-Beam Headlamp Low-Beam Headlamp Stoplamp/Taillamp/ Turn Signal Lamp Stoplamp/Turn Signal Lamp/ Taillamp* * Chassis Cab Models
For replacement bulbs not listed here, contact your dealer.
1. Remove the two screws and lift
off the lamp assembly.
2. Turn the bulb socket
counterclockwise and pull it straight out.
3. Pull the bulb straight out from
the socket.
Replacement Bulbs
Exterior Lamp
Back-up Lamp Back-up Lamp*
Bulb
Number
921 (W16W)
1156
Electrical System
Electrical System Overload The vehicle has fuses to protect against an electrical system overload. Fuses also protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, there is a fuse puller in the Engine Compartment Fuse Block. Replace the fuse as soon as possible with one of the same amperage rating. Headlamp Wiring An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
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Windshield Wipers If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Fuses The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating.
If a fuse goes out, replace the fuse as soon as you can.
Engine Compartment Fuse Block If the vehicle has a diesel engine, see the Duramax diesel supplement. The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle.
Vehicle Care
285
Caution
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
A fuse puller is available inside this fuse block.
Lift the cover to access the fuse block.
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The vehicle may not be equipped with all of the fuses, relays, and features shown.
Mini Fuses
(2 pin)
Usage
F01
F02
F03
F04
F05
F07
F08
F09
F10
F11
F13
Traction Control
Module Power
Engine Control
Module Power
Air Conditioning
Compressor Clutch
Not Used
Fuel Module
Ignition
Cargo Lamp
Fuel Injectors
- Even
Fuel Injectors
- Odd
Engine Control
Module
Miscellaneous 1
Ignition
Traction Control
Module
Mini Fuses
(2 pin)
Usage
Mini Fuses
(2 pin)
Usage
Vehicle Care
287
F14
F15
F16
F17
F18
F19
F20
F23
F29
F30
F31
F32
F33
F34
F35
Not Used
Not Used
Not Used
Front Axle Actuator
Not Used
Aeroshutters
Not Used
Not Used
Not Used
Heated Seat
Power 1
Not Used
Heated Seat
Power 2
Body Control
Module 3
Fuel System
Control Module
Not Used
F36
F37
F38
F39
F40
F46
F47
F48
F49
F50
F51
F52
F53
F54
F55
Center High
Mounted
Stop Lamp
Right High-Beam
Headlamp
Left High-Beam
Headlamp
Not Used
Not Used
Not Used
Miscellaneous 2
Ignition
Fog Lamps (If
Equipped)
Not Used
Trailer Park Lamps
Horn
Not Used
Not Used
Not Used
Not Used
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Vehicle Care
Mini Fuses
(2 pin)
Usage
F56
F57
F58
F60
F61
F62
F63
F64
F65
F66
F67
F68
F69
F70
F71
Washer Pump Not Used Not Used Mirrors Defogger Not Used Canister Vent Solenoid Not Used Trailer Reverse Lamp Left Trailer Stop/ Turn Lamps Right Trailer Stop/ Turn Lamps Electric Power Steering Not Used Battery Regulated Voltage Control Not Used Not Used
J-Case
Fuses (Low
Profile)
Usage
J-Case
Fuses (Low
Profile)
Usage
F06
F12
F21
F22
F24
F25
F26
F27
F28
F41
F42
F43
F44
F45
Wipers Starter Front Blower Antilock Brake System Valves Trailer Transfer Case Electronic Control Antilock Brake System Pump Trailer Brake Control Module Rear Window Defogger Not Used Not Used Cooling Fan Not Used Brake Vacuum Pump
F59
Not Used
Midi Fuses
Usage
F72
F73
F74
F75
Micro Relays
K01
K02
K03
K04
K05
K06
K08
K09
Not Used Not Used Generator Not Used
Usage
Air Conditioning Compressor Clutch Starter Not Used Wipers Speed Wipers Control Cargo Lamp Not Used Not Used
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Micro Relays
Usage
Instrument Panel Fuse Block
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289
K10
K11
K12
K13
K14
Not Used Center High Mounted Stop Lamp Not Used Vacuum Pump Park Lamps
Mini Relays
Usage
K07
K15
K17
Powertrain Run/Crank Rear Window Defogger
Solid State
Usage
Relay
K16
Not Used
The instrument panel fuse block is behind the passenger side cowl side trim panel. Remove the plastic nut at the front of the cover, then pull the cover away from the trim panel to access the fuse block.
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Vehicle Care
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Micro Fuse (2 Pin)
Usage
F01
F04
F05
F08
F09
F10
F11
F12
F14
F15
F16
F17
F19
Body Control
Module 1
Steering Wheel
Controls
Body Control
Module 2
Mirror Window
Module
Instrument Cluster
Not Used
Body Control
Module 8
Not Used
Radio/HMI
Body Control
Module 6
Not Used
Body Control
Module 4
Not Used
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Micro Fuse (2 Pin)
Usage
F20
F21
F22
F24
F25
F26
F27
F29
F31
F32
F34
F35
F36
F38
Amplifier (if equipped)
Not Used
Not Used
Heating, Ventilation,
and Air Conditioning
Ignition
Body Control
Module 7
Not Used
Not Used
Miscellaneous Ignition
Front Camera
Steering Wheel
Controls Backlighting
Not Used
Park, Reverse,
Neutral, Drive, Low
Discrete Logic Ignition
Sensor
Not Used
Micro Fuse (3 Pin)
F13
F18
F23
F28
F33
Micro
J-Case
Fuse
F02
F03
F06
F07
F39
Usage
OnStar/Heating, Ventilation, and Air Conditioning Airbag Data Link Connector/USDB Instrument Panel/ Sensing and Diagnostic Module Ignition Not Used
Usage
Not Used
Not Used
Not Used
Not Used
Auxiliary Power
Outlet 2
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291
Usage
Auxiliary Power Outlet 1/Lighter Left Power Window Driver Power Seat Right Power Window Passenger Power Seat
Usage
Not Used Auxiliary Power Outlet Auxiliary Power Outlet
Micro
J-Case
Fuse
F41
F42
F43
F45
F46
J-Case
Fuse
F30
F40
F44
Mini Fuse (2 Pins)
Usage
F37
Not Used
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Vehicle Care
Micro Relay
K1
K2
Usage
Wheels and Tires
Retained Accessory Power/Accessory Run/Crank
Tires Every new GM vehicle has high-quality tires made by a leading tire manufacturer. See the warranty manual for information regarding the tire warranty and where to get service. For additional information refer to the tire manufacturer.
{ Warning
. Poorly maintained and
improperly used tires are dangerous.
. 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
ii
(Continued)
Warning (Continued)
. 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.
. 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.
. Worn or old tires can cause a crash. If the tread is badly worn, replace them.
(Continued)
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Warning (Continued)
. Replace any tires that
have been damaged by impacts with potholes, curbs, etc. Improperly repaired tires can cause a crash. Only the dealer or an authorized tire service center should repair, replace, dismount, and mount the tires.
. 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.
All-Season Tires 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
equipment all-season tires can be
identified by the last two characters
of this TPC code, which will
be “MS.”
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 performance as winter
tires on snow or ice-covered roads.
See Winter Tires 0 293
ii
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
Vehicle Care
293
ii
for details regarding winter tire
availability and proper tire selection.
Also, see Buying New Tires 0 307
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.
If using 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 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.
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Vehicle Care
All-Terrain Tires
This vehicle may have all-terrain
tires. These tires provide good
performance on most road surfaces,
weather conditions, and for off-road
driving. See Off-Road Driving
0 196
The tread pattern on these tires may
wear more quickly 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
0 304
ii
ii
Tire Sidewall Labeling Useful information about a tire is molded into its sidewall. The examples show a typical passenger vehicle tire and a compact spare tire sidewall.
GM's TPC specifications meet or exceed all federal safety guidelines. (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. DOT Tire Date of Manufacture : The last four digits of the TIN indicate the tire manufactured date. The first two digits represent the week (01– 52) and the last two digits, the year. For example, the third week of the year 2010 would have a four-digit DOT date of 0310. (4) Tire Identification Number (TIN) : The letters and numbers following the DOT (Department of Transportation) code are the Tire Identification Number (TIN). The TIN shows the
Passenger (P-Metric) Tire Example (1) Tire Size : The tire size 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 later in this section. (2) TPC Spec (Tire Performance Criteria Specification) : Original equipment tires designed to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall.
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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.
(5) Tire Ply Material : The type
of cord and number of plies in
the sidewall and under the tread.
(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 0 309
(7) Maximum Cold Inflation
Load Limit : Maximum load that
can be carried and the
maximum pressure needed to
support that load.
(8) Temporary Use Only : Only
use a temporary spare tire until
the road tire is repaired and
ii
replaced. This spare tire should
not be driven on over 112 km/h
(70 mph), or 88 km/h (55 mph)
when pulling a trailer, with the
proper inflation pressure. See
Full-Size Spare Tire 0 323
ii
Compact Spare Tire Example (1) Tire Ply Material : The type of cord and number of plies in the sidewall and under the tread. (2) Temporary Use Only : The compact spare tire or temporary use tire should not be driven at speeds over 80 km/h (50 mph). The compact spare tire is for
ii
ii
and If a Tire Goes
emergency use when a regular
road tire has lost air and gone
flat. If the vehicle has a compact
spare tire, see Compact Spare
Tire 0 322
Flat 0 312
(3) Tire Identification Number
(TIN) : The letters and numbers
following the DOT (Department
of Transportation) 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.
(4) Maximum Cold Inflation
Load Limit : Maximum load that
can be carried and the
maximum pressure needed to
support that load.
(5) Tire Inflation : The
temporary use tire or compact
spare tire should be inflated to
420 kPa (60 psi). For more
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Vehicle Care
ii
information on tire pressure and
inflation see Tire Pressure
0 299
(6) Tire Size : A combination of
letters and numbers define a
tire's width, height, aspect ratio,
construction type, and service
description. The letter T as the
first character in the tire size
means the tire is for temporary
use only.
(7) TPC Spec (Tire
Performance Criteria
Specification) : Original
equipment tires designed to
GM's specific tire performance
criteria have a TPC specification
code molded onto the sidewall.
GM's TPC specifications meet or
exceed all federal safety
guidelines.
Tire Designations
Tire Size The following is an example of a typical passenger vehicle tire size.
(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. (2) Tire Width : The three-digit number indicates the tire section width in millimeters from sidewall to sidewall.
(3) 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 3 of the illustration, it would mean that the tire's sidewall is 60 percent as high as it is wide. (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; and the letter B means belted-bias ply construction. (5) Rim Diameter : Diameter of the wheel in inches. (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.
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Tire Terminology and Definitions 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). Accessory Weight : The combined weight of optional accessories. Some examples of optional accessories are automatic transmission, power windows, power seats, and air conditioning. Aspect Ratio : The relationship of a tire's height to its width. Belt : A rubber coated layer of cords between the plies and the tread. Cords may be made from steel or other reinforcing materials.
Bead : The tire bead contains
steel wires wrapped by steel
cords that hold the tire onto
the rim.
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.
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
0 299
Curb Weight : The weight of a
motor vehicle with standard and
optional equipment including the
maximum capacity of fuel, oil,
and coolant, but without
passengers and cargo.
DOT Markings : A code molded
into the sidewall of a tire
signifying that the tire is in
compliance with the U.S.
ii
ii
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.
GVWR : Gross Vehicle Weight
Rating. See Vehicle Load Limits
0 204
GAWR FRT : Gross Axle Weight
Rating for the front axle. See
Vehicle Load Limits 0 204
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.
Kilopascal (kPa) : The metric
unit for air pressure.
ii
ii
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Vehicle Care
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.
Maximum Inflation Pressure :
The maximum air pressure to
which a cold tire can be inflated.
The maximum air pressure is
molded onto the sidewall.
Maximum Load Rating : The
load rating for a tire at the
maximum permissible inflation
pressure for that tire.
Maximum Loaded Vehicle
Weight : The sum of curb
weight, accessory weight,
vehicle capacity weight, and
production options weight.
ii
Normal Occupant Weight : The
number of occupants a vehicle
is designed to seat multiplied by
68 kg (150 lb). See Vehicle Load
Limits 0 204
Occupant Distribution :
Designated seating positions.
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.
Passenger (P-Metric) Tire : A
tire used on passenger cars and
some light duty trucks and
multipurpose vehicles.
Recommended Inflation
Pressure : Vehicle
manufacturer's recommended
ii
ii
tire inflation pressure as shown
on the tire placard. See Tire
and Vehicle
Pressure 0 299
Load Limits 0 204
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.
Sidewall : The portion of a tire
between the tread and the bead.
Speed Rating : An
alphanumeric code assigned to
a tire indicating the maximum
speed at which a tire can
operate.
Traction : The friction between
the tire and the road surface.
The amount of grip provided.
Tread : The portion of a tire that
comes into contact with
the road.
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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
0 306
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 0 309
Vehicle Capacity Weight : The
number of designated seating
positions multiplied by
68 kg (150 lb) plus the rated
cargo load. See Vehicle Load
Limits 0 204
ii
ii
Vehicle Maximum Load on the
Tire : Load on an individual tire
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
Vehicle Placard : A label
permanently attached to a
vehicle showing the vehicle
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See “Tire and Loading
Information Label” under Vehicle
Load Limits 0 204
ii
Tire Pressure Tires need the correct amount of air pressure to operate effectively.
Vehicle Care
299
Caution
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.
. Premature or irregular wear. . Poor handling. . Reduced fuel economy. Overinflated tires, or tires that have too much air, can result in:
. Unusual wear. . Poor handling. . Rough ride. . Needless damage from
road hazards.
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Vehicle Care
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. 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.
ii
When to Check
Check the tires once a month or
more. Do not forget to check the
spare tire. If the vehicle has a
compact spare tire, it should be
at 420 kPa (60 psi). See
Compact Spare Tire 0 322
Full-Size Spare Tire 0 323
additional information.
and for
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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). 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. Re-check the tire pressure with the tire gauge.
Return the valve caps on the valve stems to prevent leaks and keep out dirt and moisture.
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. 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.) As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system
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(TPMS) that illuminates a low tire pressure telltale when one or more of your tires is significantly under-inflated. 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 fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability. 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. 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 sequence will continue upon
subsequent vehicle start-ups as
long as the malfunction exists.
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.
See Tire Pressure Monitor
Operation 0 301
See Radio Frequency Statement
0 367
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Vehicle Care
301
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 the air pressure in the tires and transmit 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 on the instrument cluster. If the warning light comes on, stop as soon as possible and inflate the tires to the recommended pressure
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shown on the Tire and Loading
Information label. See Vehicle Load
Limits 0 204
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. Using the DIC, tire
pressure levels can be viewed. For
additional information and details
about the DIC operation and
displays, see Driver Information
Center (DIC) (Base Level) 0 122
Driver Information Center (DIC)
(Uplevel) 0 125
0 133
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.
and Tire Messages
or
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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
, for an example of the
Limits 0 204
Tire and Loading Information label
and its location. Also see Tire
Pressure 0 299
The TPMS can warn about a low
tire pressure condition but it does
not replace normal tire
maintenance. See Tire Inspection
0 304
Tires 0 292
, Tire Rotation 0 305
, and
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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 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.
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.
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. 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 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 0 307
ii
. Operating electronic devices or being near facilities using radio wave frequencies similar to the TPMS could cause the TPMS sensors to malfunction.
If the TPMS is not functioning properly, it cannot detect or signal a low tire condition. See your dealer for service if the TPMS malfunction light and DIC message come on and stay on. TPMS Sensor Matching Process Each TPMS sensor has a unique identification code. The identification code needs to be matched to a new tire/wheel position after rotating the vehicle’s tires or replacing one or more of the TPMS sensors. Also, the TPMS sensor matching process should be performed after replacing a spare tire with a road tire containing the TPMS sensor. The malfunction light and the DIC message should go off at the next ignition cycle. The sensors are matched to the tire/wheel positions, using a TPMS relearn tool, in the following order: driver side front tire,
Vehicle Care
303
passenger side front tire, passenger side rear tire, and driver side rear. See your dealer for service or to purchase a relearn tool. A TPMS relearn tool can also be purchased. See Tire Pressure Monitor Sensor Activation Tool at www.gmtoolsandequipment.com or call 1-800-GM TOOLS (1-800-468-6657). There are two minutes to match the first tire/wheel position, and five minutes overall to match all four tire/wheel positions. If it takes longer, the matching process stops and must be restarted. The TPMS sensor matching process is: 1. Set the parking brake. 2. Turn the ignition to ON/RUN
3.
with the engine off. If the vehicle has an uplevel DIC, make sure the Tire Pressure info page option is turned on. The info pages on the DIC can be turned on and off through the Settings menu.
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4.
5.
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or
See Driver Information Center
(DIC) (Base Level) 0 122
Driver Information Center (DIC)
(Uplevel) 0 125
If the vehicle has an uplevel
DIC, use the DIC controls on
the right side of the steering
wheel to scroll to the Tire
Pressure screen under the DIC
info page.
If the vehicle has a base level
DIC, use the MENU button to
select the Vehicle Information
menu in the DIC. Use the
thumbwheel to scroll to the Tire
Pressure Menu item screen.
If the vehicle has an uplevel
DIC, press and hold the V
(Set/Reset) button located in
the center of the DIC controls.
If the vehicle has a base level
DIC, press the SET/CLR button
to begin the sensor matching
process.
A message asking if the process should begin should appear. Press the SET/CLR button again to confirm the selection. The horn sounds twice to signal the receiver is in relearn mode and the TIRE LEARNING ACTIVE message displays on the DIC screen.
6. Start with the driver side
front tire.
7. Place the relearn tool against
the tire sidewall, near the valve stem. Then press the button to activate the TPMS sensor. A horn chirp confirms that the sensor identification code has been matched to this tire and wheel position.
8. Proceed to the passenger side
front tire, and repeat the procedure in Step 7.
9. Proceed to the passenger side
rear tire, and repeat the procedure in Step 7.
10. Proceed to the driver side rear tire, and repeat the procedure in Step 7. The horn sounds two times to indicate the sensor identification code has been matched to the driver side rear tire, and the TPMS sensor matching process is no longer active. The TIRE LEARNING ACTIVE message on the DIC display screen goes off.
11. Turn the ignition switch to
LOCK/OFF.
12. Set all four tires to the
recommended air pressure level as indicated on the Tire and Loading Information label.
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.
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Tires are rotated to achieve a
uniform wear for all tires. The
first rotation is the most
important.
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
rotation, check the wheel
alignment. See When It Is Time
and Wheel
for New Tires 0 306
Replacement 0 310
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Replace the tire if: . The indicators at three or
more places around the tire can be seen.
. 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.
. 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.
Tire Rotation
Tires should be rotated every
12 000 km (7,500 mi). See
Maintenance Schedule 0 341
ii
Use this rotation pattern when
rotating the tires.
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
and Vehicle
Tire Pressure 0 299
Load Limits 0 204
Reset the Tire Pressure Monitor
System. See Tire Pressure
Monitor Operation 0 301
Check that all wheel nuts are
properly tightened. See “Wheel
Nut Torque” under Capacities
and Specifications 0 355
{ Warning
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Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come (Continued)
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Vehicle Care
Warning (Continued)
off and cause an accident. When changing a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, a cloth or a paper towel can be used; however, use a scraper or wire brush later to remove all rust or dirt.
Lightly coat the center of the wheel hub with wheel bearing grease after a wheel change or tire rotation to prevent corrosion or rust build-up. Do not get grease on the flat wheel mounting surface or on the wheel nuts or bolts.
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.
equipped, be replaced after six years, regardless of tread wear. The tire manufacture date is the last four digits of the DOT Tire Identification Number (TIN) which is molded into one side of the tire sidewall. The first two digits represent the week (01-52) and the last two digits, the year. For example, the third week of the year 2010 would have a four-digit DOT date of 0310. 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. 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.
and Tire Rotation
for additional information.
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. Some
commercial truck tires may not have
treadwear indicators. See Tire
Inspection 0 304
0 305
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
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and snow. See Tire Sidewall
for additional
Labeling 0 294
information.
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.