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Vehicle Care 10-39
FusesUsage
ECM Engine Control
Module
ENG-3 Engine 3
ENG-2 Engine 2
ENG-1 Engine 1
HYBRID BEC Not Used
RUN Run
S/ROOF Sunroof Module
HTD/SEAT Heated Seat Control
Module
BCM Body Control
Module
STRTR Starter Motor WPR Windshield Wiper
4WD/ESCM All-Wheel Drive
System
ABS Antilock Brake
System Module Fuses
Usage
A/C CLTCH Air Conditioning
Compressor
BLWR MTR Blower Motor AMP Amplifier
HORN Horn
ABS Antilock Brake
System Module
I/P BEC Instrument Panel
Bussed Electrical
Center
FRT FOG Front Fog Lamps
I/P BEC Instrument Panel
Bussed Electrical
Center
DRL Daytime Running
Light
T/LAMP RT Right Marker and
Parking Lamps
T/LAMP LT Left Marker and
Parking Lamps Fuses
Usage
TRLR
T/LAMP Trailer Parking
Lamps
HDLP HI LT Passenger Side
High-Beam
Headlamp
STOP LP Stoplamps DEFOG Defroster Fog
HDLP
LO RT Driver Side
Low-Beam
Headlamp
HDLP
LO LT Passenger Side
Low-Beam
Headlamp
HDLP HI RT Driver Side
High-Beam
Headlamp
OSRVM HTR Outside Rearview
Mirror Heating
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10-40 Vehicle Care
RelaysUsage
FAN
MAIN RLY Cooling Fan Main
Relay
FAN
CTRL RLY Cooling Fan
Control Relay
FAN
AUX RLY Cooling Fan
Auxiliary Relay
PWR/
TRN RLY Engine Control
Module/CAM,
Canister, Injectors,
Electronic Throttle
Control Relay
STRTR RLY Starter Relay RUN RLY Run Relay
A/C
CLTCH RLY Air Conditioning
Compressor Relay
WPR
SPD RLY Windshield Wiper
Speed Relay Relays
Usage
HORN RLY Horn Relay WPR
CNTRL RLY Windshield Wiper
Control Relay
T/LAMP RLY Parking Lamp Relay
HDLP
HI RLY High-Beam
Headlamp Relay
HDLP
LO RLY Low‐Beam
Headlamp Relay
FRT
FOG RLY Front Foglamp
Relay
STOP
LP RLY Stoplamp Relay
DEFOG RLY Defogger RelayInstrument Panel Fuse
Block
The instrument panel fuse block is
located on the passenger side of the
lower console.
Pull the latch of the fuse box cover
straight back to access the fuses.
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Vehicle Care 10-41
Fuses Usage
PWR SEAT Power Seat
PASS
P/WIN Passenger Side
Power Window Fuses Usage
DRIV
P/WIN Driver Side Power
Window
S/ROOF Sunroof Module Fuses Usage
CIGAR Cigarette Lighter
ECM/TCM Engine Control
Module (ECM)/
Transmission
Control
Module (TCM)
FSCM Fuel Storage Control
Module
ISRVM Inside Rearview
Mirror
CLUSTER Instrument Panel
Cluster
AIR BAG Airbag System
OSRVM Outside Rearview
Mirror
KEY CAP Key Capture
Solenoid
WHL S/W Steering Wheel
Switch
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10-42 Vehicle Care
Fuses Usage
F/DR LCK Front Driver
Door Lock
APO2 Accessory Power
Outlet 2
BCM (VB3) Body Control
Module (BCM) (VB3)
DR LCK Door Lock
BCM (VB6) Body Control
Module (VB6)
BCM (VB4) Body Control
Module (VB4)
BCM (VB5) Body Control
Module (VB5)
TRL Trailer
AIRCON Air Conditioner AUDIO Audio Fuses Usage
BCM (VB7) Body Control
Module (VB7)
IGN SW Ignition Switch
AIR BAG Air Bag System
WASHER Washer Pump
APO1 Accessory Power
Outlet 1
FSCM Fuel Storage Control
Module
RR CLR Rear Closure
BCM (VB2) Body Control
Module (VB2)
DRL Daytime Running
Light
BCM (VB1) Body Control
Module (VB1)
ONSTAR OnStar
®
Relays Usage
RELAY
ACC/RAP Accessory, Retained
Accessory Power
(RAP) Relay
RELAY RUN/
CRANK Run/Crank Relay
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Vehicle Care 10-43
Wheels and Tires
Tires
Your new vehicle comes with
high-quality tires made by a
leading tire manufacturer. If you
ever have questions about your
tire warranty and where to
obtain service, see your vehicle
Warranty booklet for details.
For additional information refer
to the tire manufacturer.
{WARNING
Poorly maintained and improperly
used tires are dangerous.
.Overloading your tires can
cause overheating as a result
of too much flexing. You
could have an air-out and a
serious accident. SeeVehicle
Load Limits on page 9‑22.
.Underinflated tires pose the
same danger as overloaded
tires. The resulting accident
could cause serious injury.
Check all tires frequently to
maintain the recommended
pressure. Tire pressure
should be checked when your
tires are cold. See Tire
Pressure on page 10‑50.
(Continued)
WARNING (Continued)
.Overinflated tires are more
likely to be cut, punctured
or broken by a sudden
impact—such as when you
hit a pothole. Keep tires at
the recommended pressure.
.Worn, old tires can cause
accidents. If your tread is
badly worn, or if your tires
have been damaged,
replace them.
See Tire Pressure for High-Speed
Operation
on page 10‑52for
inflation pressure adjustment for
high speed driving.
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10-44 Vehicle Care
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.
Passenger (P‐Metric) Tire Example
(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
Specification)
: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 Identification
Number (TIN)
:The letters and
numbers following the DOT
(Department of Transportation)
code is 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.
(F) Uniform Tire Quality
Grading (UTQG)
:Tire
manufacturers are required to
grade tires based on three
performance factors: treadwear,
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Vehicle Care 10-45
traction, and temperature
resistance. For more information
seeUniform Tire Quality
Grading
on page 10‑62.
(G) Maximum Cold Inflation
Load Limit
:Maximum load that
can be carried and the
maximum pressure needed to
support that load.
Compact Spare Tire Example
(A) Tire Ply Material:The type
of cord and number of plies in
the sidewall and under the tread.
(B) Temporary Use Only
:
The compact spare tire or
temporary use tire has a tread
life of approximately 5 000 km
(3,000 miles) and should not be
driven at speeds over 105 km/h
(65 mph). The compact spare
tire is for emergency use when
a regular road tire has lost air
and gone flat. If your vehicle
has a compact spare tire,
see Compact Spare Tire
on
page 10‑73
and If a Tire Goes
Flat
on page 10‑65.
(C) Tire Identification
Number (TIN)
:The letters and
numbers following the DOT
(Department of Transportation)
code is 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 Inflation
Load Limit
:Maximum load
that can be carried and the
maximum pressure needed to
support that load.
(E) Tire Inflation
:The
temporary use tire or compact
spare tire should be inflated to
420 kPa (60 psi). For more
information on tire pressure and
inflation see Tire Pressure
on
page 10‑50
.
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10-46 Vehicle Care
(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
Specification)
: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 Designations
Tire Size
The following illustration shows
an example of a typical
passenger vehicle tire size.
(A) Passenger (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 60, as shown in
item C of the illustration, it would
mean that the tire's sidewall is
60 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
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