2012 CHEVROLET EXPRESS PASSANGER traction control

Black plate (65,1)Chevrolet Express Owner Manual - 2012
Vehicle Care 10-65
SeeTire Inspection on page 10‑62
and Tire Rotation on page 10‑62 for
additional information.
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 conditions
including temperatures, loading
conditions, and inflation pressure
maintenance affect how fast aging
takes place. Tires will typically need
to be replaced due to wear before
they may need to be replaced
due to age. Consult the tire
manufacturer for more information
on when tires should be replaced.
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.
Buying New Tires
GM has developed and matched
specific tires for the vehicle.
The original equipment tires
installed were designed to meet
General Motors Tire Performance
Criteria Specification (TPC Spec)
system rating. When replacement
tires are needed, GM strongly
recommends buying tires with the
same TPC Spec rating.
GM's exclusive TPC Spec system
considers over a dozen critical
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 on
page 10‑50 for additional
information.

Black plate (67,1)Chevrolet Express Owner Manual - 2012
Vehicle Care 10-67
Vehicles that have a tire pressure
monitoring system could give an
inaccurate low‐pressure warning if
non‐TPC Spec rated tires are
installed. SeeTire Pressure Monitor
System on page 10‑58.
The Tire and Loading Information
label indicates the original
equipment tires on the vehicle.
See Vehicle Load Limits on
page 9‑11 for the label location and
more information about the Tire and
Loading Information label.Different Size Tires and
Wheels
If wheels or tires are installed that
are a different size than the original
equipment wheels and tires, vehicle
performance, including its braking,
ride and handling characteristics,
stability, and resistance to rollover
may be affected. If the vehicle has
electronic systems such as antilock
brakes, rollover airbags, traction
control, and electronic stability
control, the performance of these
systems can also be affected.
{WARNING
If different sized wheels are used,
there may not be an acceptable
level of performance and safety if
tires not recommended for those
wheels are selected. This
increases the chance of a crash
and serious injury. Only use GM
specific wheel and tire systems
developed for the vehicle, and
have them properly installed by a
GM certified technician.
See Buying New Tires on
page 10‑65 andAccessories and
Modifications on page 10‑3 for
additional information.

Black plate (68,1)Chevrolet Express Owner Manual - 2012
10-68 Vehicle Care
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.
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
a 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.

Black plate (69,1)Chevrolet Express Owner Manual - 2012
Vehicle Care 10-69
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
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. Temperature
–A, B, C
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 degenerate
and reduce tire life, and
excessive temperature can lead
to sudden tire failure. The grade
C corresponds to a level of
performance which all
passenger car tires must meet
under the Federal Motor Safety
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
combination, can cause heat
buildup and possible tire failure.
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 performance. Adjustments to
wheel alignment and tire balancing
will not be necessary on a regular
basis. However, check the
alignment if there is unusual tire
wear or if the vehicle is pulling to
one side or the other. If the vehicle
vibrates when driving on a smooth
road, the tires and wheels might
need to be rebalanced. See your
dealer for proper diagnosis.

Black plate (6,1)Chevrolet Express Owner Manual - 2012
i-6 INDEX
J
Jump Starting . . . . . . . . . . . . . . . . . 10-86
K
Key and Lock Messages . . . . . . . 5-38
Keyless EntryRemote (RKE) System . . . . . . . . 2-3
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
L
Labeling, Tire Sidewall . . . . . . . . 10-50
Lamp Messages . . . . . . . . . . . . . . . 5-38
Lamps Daytime Running (DRL) . . . . . . . 6-3
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Exterior Controls . . . . . . . . . . . . . . . 6-1
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . . 6-2
License Plate . . . . . . . . . . . . . . . 10-40
Malfunction Indicator . . . . . . . . . 5-21
Reading . . . . . . . . . . . . . . . . . . . . . . . 6-7
Taillamps . . . . . . . . . . . . . . . . . . . 10-38
Lap-Shoulder Belt . . . . . . . . . . . . . 3-11 LATCH System
Replacing Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . 3-52
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . 3-46
Light StabiliTrak
®OFF . . . . . . . . . . . . . 5-25
Lighter, Cigarette . . . . . . . . . . . . . . 5-10
Lighting Entry/Exit . . . . . . . . . . . . . . . . . . . . . . 6-7
Illumination Control . . . . . . . . . . . . 6-6
Lights Airbag On-Off . . . . . . . . . . . . . . . . . 5-18
Airbag Readiness . . . . . . . . . . . . . 5-18
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . 5-24
Brake System Warning . . . . . . . 5-23
Charging System . . . . . . . . . . . . . 5-20
Cruise Control . . . . . . . . . . . . . . . . 5-28
Engine Oil Pressure . . . . . . . . . . 5-27
Flash-to-Pass . . . . . . . . . . . . . . . . . . 6-3
High-Beam On . . . . . . . . . . . . . . . . 5-28
High/Low Beam Changer . . . . . . 6-2
Safety Belt Reminders . . . . . . . . 5-17
Security . . . . . . . . . . . . . . . . . . . . . . 5-27 Lights (cont'd)
Tire Pressure . . . . . . . . . . . . . . . . . 5-26
Tow/Haul Mode . . . . . . . . . . . . . . . 5-25
Traction Control System
(TCS)/StabiliTrak
®. . . . . . . . . . 5-26
Locking Rear Axle . . . . . . . . . . . . . 9-37
Locks Automatic Door . . . . . . . . . . . . . . . . 2-8
Cargo Door Relocking . . . . . . . . . 2-7
Delayed Locking . . . . . . . . . . . . . . . 2-8
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Lockout Protection . . . . . . . . . . . . . 2-8
Power Door . . . . . . . . . . . . . . . . . . . . 2-7
Safety . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Loss of Control . . . . . . . . . . . . . . . . . 9-5
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . 3-46

Black plate (11,1)Chevrolet Express Owner Manual - 2012
INDEX i-11
Tires (cont'd)Rotation . . . . . . . . . . . . . . . . . . . . 10-62
Secondary Latch System . . . 10-83
Sidewall Labeling . . . . . . . . . . . 10-50
Terminology and
Definitions . . . . . . . . . . . . . . . . . 10-54
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . 10-68
Wheel Alignment and Tire
Balance . . . . . . . . . . . . . . . . . . . 10-69
Wheel Replacement . . . . . . . . 10-70
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . 10-64
Tow/Haul Mode . . . . . . . . . . . . . . . . 9-32
Tow/Haul Mode Light . . . . . . . . . . 5-25
Towing
Driving Characteristics . . . . . . . . 9-46
Equipment . . . . . . . . . . . . . . . . . . . . 9-55
General Information . . . . . . . . . . 9-46
Recreational Vehicle . . . . . . . . 10-90
Trailer . . . . . . . . . . . . . . . . . . . . . . . . 9-50
Vehicle . . . . . . . . . . . . . . . . . . . . . 10-90 Traction
Control System (TCS)/
StabiliTrak
®Light . . . . . . . . . . . . 5-26
Trailer Tow Mirrors . . . . . . . . . . . . . . . . . . . 2-14
Trailer Towing . . . . . . . . . . . . . . . . . 9-50
Transmission Automatic . . . . . . . . . . . . . . . 9-25, 9-28
Fluid, Automatic . . . . . 10-11, 10-13
Messages . . . . . . . . . . . . . . . . . . . . 5-42
Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . 13-14
Trip Odometer . . . . . . . . . . . . . . . . . 5-13
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 6-5
U
Uniform Tire QualityGrading . . . . . . . . . . . . . . . . . . . . . 10-68
Using This Manual . . . . . . . . . . . . . . . . iv
V
Vehicle Canadian Owners . . . . . . . . . . . . . . . iii
Control . . . . . . . . . . . . . . . . . . . . . . . . 9-3
IdentificationNumber (VIN) . . . . . . . . . . . . . . . 12-1
Load Limits . . . . . . . . . . . . . . . . . . . 9-11
Messages . . . . . . . . . . . . . . . . . . . . 5-34
Personalization . . . . . . . . . . . . . . . 5-42
Reminder Messages . . . . . . . . . . 5-42
Remote Start . . . . . . . . . . . . . . . . . . 2-5
Security . . . . . . . . . . . . . . . . . . . . . . 2-12
Towing . . . . . . . . . . . . . . . . . . . . . . 10-90
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . 10-56
Vehicle Identification
Service Parts IdentificationLabel . . . . . . . . . . . . . . . . . . . . . . . . 12-1
Ventilation, Air . . . . . . . . . . . . . . . . . . 8-8
Visors . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Voltmeter Gauge . . . . . . . . . . . . . . 5-16