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 (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 significantly 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 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 indoorlaboratory 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 Vehicle 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 on your vehicle were aligned
and balanced carefully at the factory to give you the
longest tire life and best overall performance.
Adjustments to wheel alignment and tire balancing will
not be necessary on a regular basis. However, if
you notice unusual tire wear or your vehicle pulling to
one side or the other, the alignment may need to
be checked. If you notice your vehicle vibrating when
driving on a smooth road, your tires and wheels
may need to be rebalanced. See your dealer for
proper diagnosis.
5-63
3. Remove the valve stem cap from the flat tire by
turning it counterclockwise.
If an object, such as a nail, has penetrated the tire,
do not remove it.
4. Attach the sealant filling hose (A) onto the tire valve
stem. Turn it clockwise until it is tight.
Make sure the inflator kit on/off switch (B) is in the
O (off) position.5. Plug the air compressor accessory plug (C) into
an accessory power outlet in the vehicle. See
Accessory Power Outlet(s) on page 3-19for
more information.
{CAUTION:
Idling the engine in a closed-in place or with
the climate control system off can cause
deadly carbon monoxide (CO). SeeEngine
Exhaust on page 2-26.
6. Start the vehicle. SeeStarting the Engine on
page 2-17for more information. The vehicle must be
running while using the air compressor.
{CAUTION:
In ating something too much can make it
explode, and you or others could be injured.
Be sure to read the in ator instructions, and
in ate the tire to its recommended pressure.
Do not exceed 36 psi (248 kPa).
5-70
4. Push the air compressor inflator hose onto the
tire valve stem and push the lever down to
secure in place.
5. Plug the air compressor accessory plug into an
accessory power outlet in the vehicle. See
Accessory Power Outlet(s) on page 3-19for
more information.
{CAUTION:
Idling the engine in a closed-in place or with
the climate control system off can cause
deadly carbon monoxide (CO). SeeEngine
Exhaust on page 2-26.
6. Start the vehicle. SeeStarting the Engine on
page 2-17for more information. The vehicle must be
running while using the air compressor.
{CAUTION:
In ating something too much can make it
explode, and you or others could be injured.
Be sure to read the in ator instructions, and
in ate the tire to its recommended pressure.
Do not exceed 36 psi (248 kPa).
7. Move the inflator kit switch to the I (on) position.
8. Make sure there is a proper connection between the
tire valve stem and the air compressor hose by
looking at the air pressure gage. If there is not a
pressure reading while the compressor is running,
the connection between the inflator kit and the
tire is bad.
Check the attachment between the air compressor
hose and the tire valve stem.
5-74
Fuses Usage
29 Transmission Control Module
31 Truck Body Controller
32 Remote Keyless Entry (RKE)
33 Windshield Wipers
34 Stoplamps
35 Blank
36Climate Control System, Driver’s
Door Unlock
37 Front Parking Lamps
38 Driver’s Side Turn Signal
39 Climate Control System
40 Truck Body Controller
41 Radio
42 Trailer Parking Lamps
43 Passenger’s Side Turn Signal
44 Blank
46 Accessory Power Outlets
47 IgnitionFuses Usage
48 Blank
49 Blank
50 Truck Body Controller, Ignition
51 Brakes
52 Blank
Relays Usage
18 Locks
24 Unlock
30 Parking Lamps
45Rear Window Defogger, Outside
Power Heated Mirrors
Circuit
BreakersUsage
01 Roof & Door Module
02 Roof Pump
08 Power Seats
5-89
Fuses Usage
4 Driver’s Side High Beam Headlamp
5 Driver’s Side Low Beam Headlamp
6 Cargo Cover Release
7Transmission Control
Module/Canister
8 Truck Body Controller
9 Windshield Washer
10 Driver’s Side Stoplamp/Turn Signals
11 Fuel Pump
12 Fog Lamps
13 Stoplamps
14 Headlamp Driver Module (HDM)
15Passenger’s Side Stoplamp/Turn
Signals
16 Cigarette Lighter
17 Hazard Warning Flashers
18 Coils
19 Truck Body Control, Ignition 1
20 Starter
21 Airbag System
22 Horn
23 Ignition EFuses Usage
24Instrument Panel Cluster, Driver
Information Center (DIC)
25Automatic Transmission Shift
Interlock Control System
26 Back-up lamps, Lock Out
27 Engine Control Module
28 Oxygen Sensor B
29 Injector B
30 Air Conditioning
31Engine Control Module (ECM),
Transmission Control Module (TCM)
32 Transmission
33 Engine 1
34Engine Control Module, Electronic
Brake Controller
35 Oxygen Sensor A
36 Injector A
37 Engine Cooling Fan
38 Anti-lock Brake System (ABS)
39 Ignition A
40 Climate Control Fan
41 Ignition B
5-91
Child Restraints
Child Restraint Systems...............................1-26
Infants and Young Children...........................1-23
Lower Anchors and Tethers for Children..........1-30
Older Children.............................................1-20
Securing a Child Restraint in the Passenger
Seat Position...........................................1-36
Cigarette Lighter.............................................3-20
Cleaning
Aluminum or Chrome-Plated Wheels..............5-82
Exterior Lamps/Lenses.................................5-80
Fabric/Carpet..............................................5-78
Finish Care.................................................5-80
Inside of Your Vehicle..................................5-76
Instrument Panel, Vinyl, and Other
Plastic Surfaces.......................................5-79
Leather......................................................5-78
Tires..........................................................5-82
Underbody Maintenance...............................5-83
Washing Your Vehicle...................................5-80
Weatherstrips..............................................5-79
Windshield and Wiper Blades........................5-81
Climate Control System...................................3-21
Outlet Adjustment........................................3-23
Clutch, Hydraulic.............................................5-23
Collision Damage Repair..................................7-10
Content Theft-Deterrent....................................2-13
Control of a Vehicle.......................................... 4-6
Convertible Top..............................................2-45
Lowering the Convertible Top........................2-47Convertible Top (cont.)
Raising the Convertible Top..........................2-48
Coolant
Engine Temperature Gage............................3-32
Surge Tank Pressure Cap.............................5-27
Cooling System..............................................5-29
Cruise Control................................................3-10
Cruise Control Light........................................3-37
Cupholder(s)..................................................2-34
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text
Telephone (TTY) Users............................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-5
Reporting Safety Defects to General Motors.......7-14
Reporting Safety Defects to the Canadian
Government............................................7-14
Reporting Safety Defects to the United
States Government...................................7-13
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-14
D
Daytime Running Lamps..................................3-14
Defensive Driving............................................. 4-2
Doing Your Own Service Work........................... 5-4
3