
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.
5-65

Fuse Usage
HTD MIRROR Heated Mirrors
RH T/LP Driver's Side Taillamp (Export Only)
RR FOG LP Fog Lamps (Export Only)
CIGAR/DIC/
APO FRTCigarette Lighter, DIC, Front
Auxiliary Power Outlets, Data Link
T/SIG Turn Signal Switch
PWR QTR
VENTInterior Lamp and Multifunction
Switch (Power Vent Switch), Auto
Level
FRT/WPR/
WSHRWindshield Wiper/Washer Motor and
Switch
HAZARD Hazard Switch
RR PWR SCKTRear Electric Accessory Plug
Housing
DRLDaytime Running Lamp Control
Module
LH T/LPPassenger's Side Taillamp
(Export Only)
RR
DEFOG/HTD
MIRRORRear Window Defogger Relay,
Heated Mirrors
ON STAR OnStar
ž
Fuse Usage
SIR In¯atable Restraint Control Module
HVAC
BLOWERHeater-A/C Control
MALL
CLUSTERInstrument Cluster, Body Control
Module, Electronic Level Control
(ELC) Sensor and Relay, Theft,
Door Ajar
STOP LAMP Stoplamp Switch
CLUSTER
BATTModule/Electronic Brake Control
Module/Electronic Brake Traction
Control Module (EBCM/EBTCM)
ENHANCED
EVAP/AWDEvaporative Emissions (EVAP)
Canister Vent Solenoid Valve,
All-Wheel Drive (AWD)
Blank Not Used
ELC/TRAILERELC Air Compressor and ELC
Height Sensor, Trailer Harness
CTSY LAMP Courtesy Lamp
IGN 1BCM, Electronic Brake Control
Indicator Lamp Driver Module,
Instrument Panel Cluster, Rear Side
Door Actuator Control Module, Rear
Windows, Rear Parking Aid
RR HVAC
TEMP CONTRear HVAC-A/C Control
5-98

J
Jump Starting.................................................5-44
K
Key Lock Cylinders Service..............................6-12
Keyless Entry System....................................... 2-5
Keys............................................................... 2-3
L
Lamps on Reminder........................................3-15
Lamps...........................................................3-15
Exterior......................................................3-15
Interior.......................................................3-17
Lap Belt................................................1-46, 1-47
Lap-Shoulder Belt...................................1-36, 1-49
Last Door Closed Locking................................2-12
Last Door Locking...........................................2-64
LATCH System...............................................1-69
Child Restraints...........................................1-69
Securing a Child Restraint Designed for the
LATCH System........................................1-71
Latches, Side Window.....................................2-25
Leaving Your Vehicle With the
Engine Running..........................................2-40Leaving Your Vehicle.......................................2-13
Liftgate..........................................................2-22
Lighted Vanity Mirror.......................................2-26
Light.............................................................3-40
Air Bag Readiness.......................................3-40
Anti-Lock Brake System Warning...................3-42
Brake System Warning.................................3-41
Malfunction Indicator....................................3-45
Safety Belt Reminder...................................3-40
TCS Warning Light......................................3-43
Traction Control System (TCS) Warning..........3-43
Loading Your Vehicle.......................................4-34
Lockout Deterrent...........................................2-64
Lockout Protection..........................................2-13
Locks............................................................2-63
Automatic Door...........................................2-63
Door........................................................... 2-9
Last Door Closed Locking.............................2-12
Leaving Your Vehicle....................................2-13
Lockout Protection.......................................2-13
Power Door................................................2-11
Programmable Automatic Door Locks.............2-12
Loss of Control...............................................4-14
Low Engine Oil Level Message.........................3-53
Low Fuel Warning Message.............................3-57
Low Oil Pressure Message...............................3-52
Luggage Carrier..............................................2-55
9

T
Tachometer....................................................3-39
Taillamps.......................................................5-56
Turn Signal, Stoplamps and Back-up Lamps....5-56
TCS Warning Light..........................................3-43
Theft-Deterrent, Radio....................................3-103
Theft-Deterrent Systems...................................2-27
Content Theft-Deterrent................................2-27
PASS-Key
žIII Operation..............................2-29
PASS-KeyžIII .............................................2-29
Throttle System Inspection...............................6-16
Tilt Wheel........................................................ 3-7
Tire In¯ation Check.........................................6-10
Tires.............................................................5-60
Buying New Tires........................................5-64
Chains.......................................................5-67
Changing a Flat Tire....................................5-71
Compact Spare Tire.....................................5-86
If a Tire Goes Flat.......................................5-70
In¯ation -- Tire Pressure...............................5-61
Inspection and Rotation................................5-62
Uniform Tire Quality Grading.........................5-65
Wheel Alignment and Tire Balance.................5-66
Wheel Replacement.....................................5-66
When It Is Time for New Tires......................5-63
To Use the Engine Coolant Heater....................2-34
Top Strap Anchor Location...............................1-67
Top Strap......................................................1-66
Torque Lock...................................................2-41Total Weight on Your Vehicle's Tires..................4-38
Towing..........................................................4-32
Recreational Vehicle.....................................4-32
Towing a Trailer..........................................4-36
Your Vehicle...............................................4-32
Traction.........................................................3-51
Active Message...........................................3-51
Control System (TCS).................................... 4-8
Control System Warning Light.......................3-43
Service Traction System Warning Message.....3-50
Trailer Brakes.................................................4-39
Trailer Wiring Harness.....................................4-43
Transaxle Operation, Automatic.........................2-34
Transaxle.......................................................5-20
Fluid, Automatic...........................................5-20
Transfer Case (Power Transfer Unit)..................5-50
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-10
Transportation Options...................................... 7-8
Trip Computer................................................3-60
Turn and Lane-Change Signals.......................... 3-8
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-41
U
Ultrasonic Rear Parking Assist (URPA)...............3-22
Underbody Flushing Service.............................6-14
Underhood Fuse Block...................................5-100
16