
Engine Oil Life System
The engine oil life system calculates engine oil life
based on vehicle use and displays a DIC message when
it is necessary to change the engine oil and filter.
Resetting the Oil Life System
1. Turn the ignition to ON/RUN, with the engine off.
2. Press and release the stem in the lower center
of the instrument cluster until the OIL LIFE
message is displayed.
3. Once the alternating OIL LIFE and RESET
messages appear, press and hold the stem
until several beeps sound. This confirms that the oil
life system has been reset.
4. Turn the key to LOCK/OFF.
SeeEngine Oil Life System on page 6-18.
Driving for Better Fuel Economy
Driving habits can affect fuel mileage. Here are some
driving tips to get the best fuel economy possible.
•Avoid fast starts and accelerate smoothly.
•Brake gradually and avoid abrupt stops.
•Avoid idling the engine for long periods of time.
•When road and weather conditions are appropriate,
use cruise control, if equipped.
•Always follow posted speed limits or drive more
slowly when conditions require.
•Keep vehicle tires properly inflated.
•Combine several trips into a single trip.
•Replace the vehicle’s tires with the same
TPC Spec number molded into the tire’s sidewall
near the size.
•Follow recommended scheduled maintenance.
1-19

Shift Speeds
{WARNING:
If you skip a gear when you downshift, you could
lose control of the vehicle. You could injure
yourself or others. Do not shift down more than
one gear at a time when you downshift.
Four-Wheel Drive
If the vehicle has four-wheel drive, you can send the
engine’s driving power to all four wheels for extra
traction. To get the best performance out of four-wheel
drive, you must be familiar with its operation. Read
this section before using four-wheel drive. You should
use two-wheel-drive high for most normal driving
conditions.
Notice:Driving on clean, dry pavement in
four-wheel drive for an extended period of time can
cause premature wear on the vehicle’s powertrain.
Do not drive on clean, dry pavement in Four-Wheel
Drive for extended periods of time.Notice:If the vehicle has four-wheel drive and the
different size spare tire is installed on the vehicle,
do not drive in four-wheel drive until you can have
your at tire repaired and/or replaced. You could
damage the vehicle, and the repair costs would not
be covered by your warranty. Never use four-wheel
drive when the different size spare tire is installed on
the vehicle.
Notice:If the vehicle has four-wheel drive and the
compact spare tire is installed on the vehicle, do not
drive in four-wheel drive until you can have the at
tire repaired and/or replaced. You could damage the
vehicle, and the repair costs would not be covered by
your warranty. Never use four-wheel drive when the
compact spare tire is installed on the vehicle.
The transfer case buttons are located to the right of the
steering wheel on the instrument panel.
3-25

Tire and Loading Information Label
A vehicle specific Tire and Loading Information
label is attached to the vehicle’s center pillar
(B-pillar). With the driver door open, you will
find the label attached below the door latch post.Vehicle’s without a center pillar, like extended cab
models, will have the Tire and Loading Information
label attached to the driver side extended cab door,
above the door latch post. The Tire and Loading
Information label shows the number of occupant
seating positions (A), and the maximum vehicle
capacity weight (B) in kilograms and pounds.
The Tire and Loading Information label also shows
the size of the original equipment tires (C) and
the recommended cold tire inflation pressures (D).
For more information on tires and inflation see
Tires on page 6-57andIn ation - Tire Pressure on
page 6-64.
There is also important information on the
Certification/Tire label. It tells you the Gross
Vehicle Weight Rating (GVWR) and the Gross
Axle Weight Rating (GAWR) for the front and rear
axles. See “Certification/Tire Label” later in this
section.
Label Example
5-34

Tires..............................................................6-57
Tire Sidewall Labeling...................................6-58
Tire Terminology and Definitions.....................6-61
Inflation - Tire Pressure.................................6-64
High-Speed Operation...................................6-65
Tire Pressure Monitor System.........................6-66
Tire Pressure Monitor Operation.....................6-67
Tire Inspection and Rotation...........................6-71
When It Is Time for New Tires.......................6-72
Buying New Tires.........................................6-73
Different Size Tires and Wheels......................6-75
Uniform Tire Quality Grading..........................6-75
Wheel Alignment and Tire Balance..................6-77
Wheel Replacement......................................6-77
Tire Chains..................................................6-78
If a Tire Goes Flat........................................6-79
Changing a Flat Tire.....................................6-80
Removing the Spare Tire and Tools................6-81
Removing the Flat Tire and Installing the
Spare Tire................................................6-85
Secondary Latch System...............................6-93
Storing a Flat or Spare Tire and Tools............6-96
Spare Tire.................................................6-101
Appearance Care..........................................6-102
Interior Cleaning.........................................6-102
Fabric/Carpet..............................................6-103Leather......................................................6-104
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................6-105
Care of Safety Belts....................................6-105
Weatherstrips.............................................6-105
Washing Your Vehicle..................................6-106
Cleaning Exterior Lamps/Lenses....................6-106
Finish Care................................................6-107
Windshield and Wiper Blades.......................6-107
Aluminum or Chrome-Plated Wheels and Trim . . .6-108
Tires.........................................................6-108
Sheet Metal Damage...................................6-109
Finish Damage...........................................6-109
Underbody Maintenance...............................6-109
Chemical Paint Spotting...............................6-109
Vehicle Identi cation.....................................6-110
Vehicle Identification Number (VIN)................6-110
Service Parts Identification Label...................6-110
Electrical System..........................................6-111
Add-On Electrical Equipment.........................6-111
Windshield Wiper Fuses...............................6-111
Fuses and Circuit Breakers..........................6-111
Engine Compartment Fuse Block...................6-112
Capacities and Speci cations........................6-118
Section 6 Service and Appearance Care
6-2

Tire Sidewall Labeling
Useful information about a tire is molded into its
sidewall. The examples below show a typical
passenger vehicle tire and a compact spare tire
sidewall.(A) 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 for more detail.
(B) TPC Spec (Tire Performance Criteria
Speci cation)
: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.
(C) 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.
(D) Tire Identi cation Number (TIN)
:The letters
and numbers following 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.
(E) Tire Ply Material
:The type of cord and number
of plies in the sidewall and under the tread.
Passenger Vehicle Tire Example
6-58

(F) 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 seeUniform Tire Quality Grading on
page 6-75.
(G) Maximum Cold In ation Load Limit
:Maximum load that can be carried and the
maximum pressure needed to support that load.(A) Temporary Use Only
:The compact
spare tire or temporary use tire has a tread life of
approximately 3,000 miles (5 000 km) and should
not be driven at speeds over 65 mph (105 km/h).
The compact spare tire is for emergency use
when a regular road tire has lost air and gone flat.
See “Compact Spare Tire” underSpare Tire on
page 6-101for additional information.
(B) Tire Ply Material
:The type of cord and
number of plies in the sidewall and under
the tread.
(C) Tire Identi cation Number (TIN)
: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.
(D) Maximum Cold In ation Load Limit
:Maximum load that can be carried and the
maximum pressure needed to support that load.
(E) Tire In ation
:The temporary use tire or
compact spare tire should be inflated to 60 psi
(420 kPa). For more information on tire pressure
and inflation seeIn ation - Tire Pressure on
page 6-64.
Compact Spare Tire Example
6-59

(F) 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.
(G) TPC Spec (Tire Performance Criteria
Speci cation)
: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 Size
The following illustration shows an example of a
typical passenger vehicle tire size.
(A) 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.(B) Tire Width
:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
(C) Aspect Ratio
:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 70, as
shown in item C of the illustration, it would mean
that the tire’s sidewall is 70 percent as high as it
is wide.
(D) 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.
(E) Rim Diameter
:Diameter of the wheel in
inches.
(F) Service Description
:These characters
represent the load index and speed rating of the
tire. The load index represents the load carry
capacity a tire is certified to carry. The speed
rating is the maximum speed a tire is certified
to carry a load.
6-60

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.
Treadwear Indicators
:Narrow bands, sometimes
called wear bars, that show across the tread of a
tire when only 1/16 inch (1.6 mm) of tread remains.
SeeWhen It Is Time for New Tires on page 6-72.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. SeeUniform Tire Quality
Grading on page 6-75.
Vehicle Capacity Weight
:The number of
designated seating positions multiplied by 150 lbs
(68 kg) plus the rated cargo load. SeeLoading
the Vehicle on page 5-33.
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’s capacity weight and
the original equipment tire size and recommended
inflation pressure. See “Tire and Loading
Information Label” underLoading the Vehicle
on page 5-33.
6-63