
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, 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
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 speci ed 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 signi cantly 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 speci ed 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.
5-57

Fuses Usage
POWER
MIRRORSPower Mirrors
EPS Electric Power Steering
RUN/CRANKCruise Control, Electronic Range
Select
HVAC
BLOWER
HIGH (Relay)Climate Control System
CLUSTER/
THEFTInstrument Panel Cluster, Theft
Deterrent System
ONSTAR OnStar
®System
NOT
INSTALLEDNot Used
AIRBAG (IGN) Airbag System
HVAC CTRL
(BATT)Climate Control System
PEDAL Adjustable Throttle and Brake Pedal
WIPER SW Windshield Wiper/Washer Switch
IGN SENSOR Ignition Switch
NOT
INSTALLEDNot Used
NOT
INSTALLEDNot Used
RADIO Audio System
INTERIOR
LIGHTSOverhead Lighting, Trunk/Cargo
Lighting
Fuses Usage
REAR WIPER Rear Wiper System/Washer Pump
HVAC
CTRL (IGN)Climate Control System
HVAC
BLOWERClimate Control System
DOOR LOCK Automatic Door Lock System
ROOF/
HEAT SEATSunroof, Heated Seats, Automatic
Dimming Rearview Mirror
POWER
WINDOWSPower Window Switch
NOT
INSTALLEDNot Used
NOT
INSTALLEDNot Used
AIRBAG
(BATT)Airbag System
FUSE PULLER Fuse Puller
SPARE FUSE
HOLDERSpare
SPARE FUSE
HOLDERSpare
SPARE FUSE
HOLDERSpare
SPARE FUSE
HOLDERSpare
5-85

Audio System(s).............................................3-54
Audio Steering Wheel Controls....................3-119
Backglass Antenna.....................................3-122
Care of Your Cassette Tape Player...............3-120
Care of Your CD and DVD Player................3-121
Care of Your CDs and DVDs .......................3-121
Fixed Mast Antenna...................................3-122
Radio with Cassette and CD.........................3-71
Radio with CD....................................3-55, 3-60
Radio with Six-Disc CD................................3-84
Rear Seat Audio (RSA).....................3-115, 3-117
Setting the Time for Radios with Radio Data
Systems (RDS)........................................3-55
Setting the Time for Radios without Radio
Data Systems (RDS)................................3-54
Theft-Deterrent Feature...............................3-118
Understanding Radio Reception...................3-120
XM™ Satellite Radio Antenna System...........3-122
Automatic Climate Control System.....................3-25
Automatic Headlamp System............................3-17
Automatic Transaxle
Fluid..........................................................5-21
Operation...................................................2-26B
Backglass Antenna........................................3-122
Battery..........................................................5-35
Run-Down Protection...................................3-20
Before Leaving on a Long Trip.........................4-21
Brake
Anti-Lock Brake System (ABS)........................ 4-6
Emergencies................................................ 4-8
Parking......................................................2-29
System Warning Light..................................3-37
Brake Pedal, Throttle.......................................2-24
Brakes..........................................................5-32
Braking........................................................... 4-5
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-21
Bulb Replacement...........................................5-41
Halogen Bulbs............................................5-41
Headlamps.................................................5-41
Replacement Bulbs......................................5-45
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps........................................5-43
Buying New Tires...........................................5-56
2