warning light CHEVROLET SILVERADO 2008 2.G Owner's Guide

Brake Wear
Your vehicle has front disc brakes and could have rear
drum brakes or rear disc brakes.
Disc brake pads have built-in wear indicators that make
a high-pitched warning sound when the brake pads
are worn and new pads are needed. The sound can
come and go or be heard all the time your vehicle
is moving, except when you are pushing on the brake
pedal rmly.
{CAUTION:
The brake wear warning sound means that soon
the brakes will not work well. That could lead to
an accident. When you hear the brake wear
warning sound, have your vehicle serviced.
Notice:Continuing to drive with worn-out brake
pads could result in costly brake repair.
Some driving conditions or climates can cause a brake
squeal when the brakes are rst applied or lightly
applied. This does not mean something is wrong with
the brakes.Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated,
inspect brake pads for wear and evenly tighten wheel
nuts in the proper sequence to torque specications
inCapacities and Specifications on page 5-133.
If you have rear drum brakes, they do not have wear
indicators, but if you ever hear a rear brake rubbing
noise, have the rear brake linings inspected immediately.
Rear brake drums should be removed and inspected
each time the tires are removed for rotation or changing.
Drum brakes have an inspection hole to inspect lining
wear during scheduled maintenance. When you
have the front brake pads replaced, have the rear
brakes inspected, too.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer/retailer if the brake pedal does not
return to normal height, or if there is a rapid increase in
pedal travel. This could be a sign that brake service
might be required.
Brake Adjustment
Every time you make a brake stop, the brakes adjust
for wear.
5-45

At the same time a message to check the pressure
in a specic tire appears on the Driver Information
Center (DIC) display. The low tire pressure warning
light and the DIC warning message come on at
each ignition cycle until the tires are inated to the
correct ination pressure. If your vehicle has DIC
buttons, tire pressure levels can be viewed by the driver.
For additional information and details about the DIC
operation and displays seeDIC Operation and Displays
(With DIC Buttons) on page 3-57orDIC Operation
and Displays (Without DIC Buttons) on page 3-63and
DIC Warnings and Messages on page 3-66.
The low tire pressure warning light may come on in
cool weather when the vehicle is rst started, and then
turn off as you start to drive. This could be an early
indicator that the air pressure in the tire(s) are getting
low and need to be inated to the proper pressure.A Tire and Loading Information label, attached to your
vehicle, shows the size of your vehicle’s original
equipment tires and the correct ination pressure for
your vehicle’s tires when they are cold. SeeLoading
Your Vehicle on page 4-36, for an example of the
Tire and Loading Information label and its location on
your vehicle. Also seeInflation - Tire Pressure on
page 5-76.
Your vehicle’s TPMS can warn you about a low tire
pressure condition but it does not replace normal
tire maintenance. SeeTire Inspection and Rotation
on page 5-83andTires on page 5-68.
Notice:Liquid tire sealants could damage the
Tire Pressure Monitor System (TPMS) sensors.
Sensor damage caused by using a tire sealant is
not covered by your warranty. Do not use liquid
tire sealants.
5-80

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 warning light
ashes for about one minute and then stays on for
the remainder of the ignition cycle. A DIC warning
message is also displayed. The low tire warning light
and DIC warning message come on at each ignition
cycle until the problem is corrected. Some of the
conditions that can cause the malfunction light and
DIC message 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 TPMS malfunction light and DIC
message should go off once you re-install the road
tire containing the TPMS sensor.
The TPMS sensor matching process was started
but not completed or not completed successfully
after rotating the vehicle’s tires. The DIC message
and TPMS malfunction light should go off once
the TPMS sensor matching process is performed
successfully. See “TPMS Sensor Matching Process”
later in this section.
One or more TPMS sensors are missing or
damaged. The DIC message and the TPMS
malfunction light should go off when the TPMS
sensors are installed and the sensor matching
process is performed successfully. See your
dealer/retailer for service.
Replacement tires or wheels do not match your
vehicle’s original equipment tires or wheels.
Tires and wheels other than those recommended
for your vehicle could prevent the TPMS from
functioning properly. SeeBuying New Tires on
page 5-86.
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 it cannot detect or signal
a low tire condition. See your dealer/retailer for service
if the TPMS malfunction light and DIC message comes
on and stays on.
5-81

Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 Traction AA
Temperature A
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-type
snow tires, space-saver, or temporary use
spare tires, tires with nominal rim diameters of
10 to 12 inches (25 to 30 cm), or to some
limited-production tires.
While the tires available on General Motors
passenger cars and light trucks may vary with
respect to these grades, they must also conform
to federal safety requirements and additional
General Motors Tire Performance Criteria (TPC)
standards.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specied
government test course. For example, a tire
graded 150 would wear one and a half (1.5) 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 signicantly from the
norm due to variations in driving habits, service
practices, and differences in road characteristics
and climate.
Traction – AA, A, B, C
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
specied 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.
5-89

A
Accessories and Modications............................ 5-4
Accessory Power Outlets.................................3-23
Adding a Snow Plow or Similar Equipment.........4-43
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-86
Additives, Fuel................................................. 5-7
Add-On Electrical Equipment...........................5-125
Adjustable Throttle and Brake Pedal..................2-26
Air Cleaner/Filter, Engine.................................5-20
Air Conditioning..............................3-25, 3-28, 3-29
Airbag
Off Light.....................................................3-41
Passenger Status Indicator...........................3-43
Readiness Light..........................................3-40
Airbag System................................................1-69
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-86
Airbag Off Switch........................................1-78
How Does an Airbag Restrain?......................1-76
Passenger Sensing System...........................1-81
Servicing Your Airbag-Equipped Vehicle..........1-86
What Makes an Airbag Inate?......................1-75
What Will You See After an Airbag Inates?....1-76
When Should an Airbag Inate?....................1-74
Where Are the Airbags?...............................1-72Antenna, Fixed Mast......................................3-134
Antenna, XM™ Satellite Radio Antenna
System.....................................................3-134
Antilock Brake System (ABS)............................. 4-4
Anti-lock Brake, System Warning Light...............3-47
Appearance Care
Aluminum or Chrome-Plated Wheels.............5-120
Care of Safety Belts...................................5-117
Chemical Paint Spotting..............................5-122
Cleaning Exterior Lamps/Lenses..................5-118
Fabric/Carpet............................................5-115
Finish Care...............................................5-119
Finish Damage..........................................5-122
Instrument Panel, Vinyl, and Other Plastic
Surfaces...............................................5-117
Interior Cleaning........................................5-114
Leather....................................................5-116
Sheet Metal Damage..................................5-121
Tires........................................................5-121
Underbody Maintenance.............................5-122
Vehicle Care/Appearance Materials...............5-123
Washing Your Vehicle.................................5-118
Weatherstrips............................................5-117
Windshield and Wiper Blades......................5-120
Appointments, Scheduling Service....................... 7-9
Ashtray.........................................................3-24
1

Audio System.................................................3-84
Audio Steering Wheel Controls....................3-132
Fixed Mast Antenna...................................3-134
Navigation/Radio System,
see Navigation Manual............................3-120
Radio Reception........................................3-133
Rear Seat Audio (RSA)...............................3-130
Setting the Clock.........................................3-86
Theft-Deterrent Feature...............................3-132
XM™ Satellite Radio Antenna System...........3-134
Audio System(s).............................................3-88
Automatic Headlamp System............................3-19
Automatic Transmission
Fluid..................................................5-22, 5-26
Operation...................................................2-28
Auxiliary Roof Mounted Lamp Switch.................3-20
B
Battery..........................................................5-46
Electric Power Management..........................3-22
Run-Down Protection...................................3-23
Brake
Emergencies................................................ 4-5
Brakes..........................................................5-43
System Warning Light..................................3-46
Braking........................................................... 4-3
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-22Bulb Replacement...........................................5-61
Center High-Mounted Stoplamp (CHMSL) and
Cargo Lamp............................................5-63
Halogen Bulbs............................................5-61
Headlamp Aiming........................................5-58
Headlamps.................................................5-62
License Plate Lamps....................................5-66
Pickup Box Identication and Fender Marker
Lamps ....................................................5-64
Replacement Bulbs......................................5-66
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps........................................5-64
Buying New Tires...........................................5-86
C
Calibration.............................................2-56, 2-58
California Fuel.................................................. 5-7
California Perchlorate Materials Requirements....... 5-5
California Proposition 65 Warning....................... 5-4
Canadian Owners................................................ ii
Capacities and Specications..........................5-133
Carbon Monoxide...........................2-13, 2-54, 4-31
Care of
Safety Belts..............................................5-117
Cargo Lamp...................................................3-22
Cargo Management System.............................2-80
CD, MP3 ............................................3-108, 3-114
Center Console Storage Area...........................2-79
2

E
EDR .............................................................7-16
Electrical System
Add-On Equipment.....................................5-125
Center Instrument Panel Fuse Block.............5-128
Fuses and Circuit Breakers.........................5-125
Instrument Panel Fuse Block.......................5-126
Power Windows and Other Power Options....5-125
Underhood Fuse Block...............................5-129
Windshield Wiper Fuses.............................5-125
Electronic Immobilizer
PASS-Key
®III+...........................................2-20
Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-20
Engine
Air Cleaner/Filter.........................................5-20
Check and Service Engine Soon Light............3-49
Coolant......................................................5-29
Coolant Heater............................................2-27
Coolant Temperature Gage...........................3-48
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14
Exhaust.....................................................2-54
Fan Noise..................................................5-40
Fast Idle System.........................................2-25
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-34Engine (cont.)
Overheating................................................5-32
Starting......................................................2-24
Entry Lighting.................................................3-21
Event Data Recorders.....................................7-17
Exit Lighting...................................................3-21
Extender, Safety Belt.......................................1-35
Exterior Lamps...............................................3-17
F
Fast Idle System............................................2-25
Filter
Engine Air Cleaner......................................5-20
Finish Damage.............................................5-122
Fixed Mast Antenna.......................................3-134
Flashers, Hazard Warning.................................. 3-8
Flash-to-Pass.................................................3-11
Flat Tire........................................................5-93
Flat Tire, Changing.........................................5-94
Flat Tire, Storing...........................................5-110
Fluid
Automatic Transmission........................5-22, 5-26
Power Steering...........................................5-41
Windshield Washer......................................5-42
Fog Lamp
Fog ...........................................................3-20
Fog Lamp Light..............................................3-53
Four-Wheel Drive....................................2-36, 5-54
5

Four-Wheel-Drive Light....................................3-54
Front Axle......................................................5-56
Fuel............................................................... 5-6
Additives...................................................... 5-7
California Fuel.............................................. 5-7
E85 (85% Ethanol)........................................ 5-8
Filling a Portable Fuel Container....................5-12
Filling the Tank...........................................5-10
Fuels in Foreign Countries.............................. 5-9
Gage .........................................................3-55
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Low Warning Light.......................................3-56
Running Out of...........................................2-54
Fuses
Center Instrument Panel Fuse Block.............5-128
Fuses and Circuit Breakers.........................5-125
Instrument Panel Fuse Block.......................5-126
Underhood Fuse Block...............................5-129
Windshield Wiper.......................................5-125G
Gage
Engine Coolant Temperature.........................3-48
Fuel..........................................................3-55
Oil Pressure...............................................3-52
Speedometer..............................................3-38
Tachometer.................................................3-38
Voltmeter Gage...........................................3-45
Garage Door Opener.......................................2-71
Gasoline
Octane........................................................ 5-6
Specications............................................... 5-6
Glove Box.....................................................2-78
GM Mobility Reimbursement Program.................. 7-6
6

H
Hazard Warning Flashers................................... 3-8
Head Restraints..............................................1-11
Headlamp
Aiming .......................................................5-58
Headlamps....................................................5-62
Bulb Replacement.......................................5-61
Daytime Running Lamps...............................3-18
Exterior Lamps............................................3-17
Flash-to-Pass..............................................3-11
Halogen Bulbs............................................5-61
High/Low Beam Changer..............................3-10
On Reminder..............................................3-18
Pickup Box Identication and
Fender Marker Lamps...............................5-64
Heated Seats................................................... 1-5
Heater...................................................3-25, 3-28
Engine Coolant...........................................2-27
Heater...........................................................3-29
Highbeam On Light.........................................3-54
Highway Hypnosis...........................................4-29
Hill and Mountain Roads..................................4-30
Hood
Checking Things Under................................5-12
Release.....................................................5-13
Horn ............................................................... 3-8
How to Wear Safety Belts Properly...................1-19
I
Ignition Positions.............................................2-22
Infants and Young Children, Restraints...............1-39
Ination - Tire Pressure...................................5-76
Instrument Panel
Brightness..................................................3-21
Cluster.......................................................3-37
Overview...............................................3-4, 3-6
Storage Area..............................................2-78
J
Jump Starting.................................................5-47
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
7

L
Labeling, Tire Sidewall.....................................5-69
Lamps
Auxiliary Roof Mounted Lamp........................3-20
Cargo........................................................3-22
Dome ........................................................3-21
Dome Lamp Override...................................3-21
Puddle.......................................................3-20
Reading.....................................................3-22
Lap Belt ........................................................1-34
Lap-Shoulder Belt...........................................1-28
LATCH System
Child Restraints...........................................1-45
Latches, Seatback..........................................1-12
License Plate Lamps.......................................5-66
Light
Airbag Off..................................................3-41
Airbag Readiness........................................3-40
Anti-lock Brake System (ABS) Warning...........3-47
Brake System Warning.................................3-46
Charging System.........................................3-45
Cruise Control.............................................3-54
Fog Lamp ..................................................3-53
Four-Wheel-Drive.........................................3-54
Highbeam On.............................................3-54
Low Fuel Warning.......................................3-56
Malfunction Indicator....................................3-49
Oil Pressure...............................................3-53
Passenger Airbag Status Indicator..................3-43Light (cont.)
Safety Belt Reminders..................................3-39
Security.....................................................3-53
StabiliTrak®Indicator....................................3-48
Tire Pressure..............................................3-49
Tow/Haul Mode ...........................................3-54
Lighting
Entry.........................................................3-21
Exit...........................................................3-21
Lights
Exterior Lamps............................................3-17
Flash-to-Pass..............................................3-11
High/Low Beam Changer..............................3-10
On Reminder..............................................3-18
Loading Your Vehicle.......................................4-36
Locking Rear Axle............................................ 4-5
Lockout Protection..........................................2-12
Locks
Delayed Locking..........................................2-11
Door ..........................................................2-10
Lockout Protection.......................................2-12
Power Door................................................2-10
Programmable Automatic Door Locks.............2-11
Rear Door Security Locks.............................2-11
Loss of Control...............................................4-11
Low Fuel Warning Light...................................3-56
Luggage Carrier..............................................2-79
Lumbar
Manual Controls............................................ 1-4
Power Controls............................................. 1-4
8