Page 302 of 398
10-36 Vehicle Care
License Plate Lamp
To replace one of these bulbs:
1. Remove the two screws holdingeach of the license plate lamps
to the fascia.
2. Turn and pull the license plate
lamp forward through the fascia
opening. 3. Turn the bulb socket
counterclockwise and pull the
bulb straight out of the socket.
4. Push the new bulb into the bulb socket and turn it clockwise to
lock it into place.
5. Push and turn the license plate back through the fascia opening.
6. Reinstall the two screws holding the license plate lamps to the
fascia.
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp 3156
Front Turn Signal/
Parking 3157K
Headlamps High-beam 9005
or HB3
Low-beam/DRL 9006
or HB4
Rear Turn Signal,
Stoplamp and
Taillamp 3057
For replacement bulbs not listed
here, contact your dealer/retailer.
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Vehicle Care 10-37
Electrical System
Electrical System
Overload
The vehicle has fuses and circuit
breakers to protect against an
electrical system overload.
When the current electrical load is
too heavy, the circuit breaker opens
and closes, protecting the circuit
until the current load returns to
normal or the problem is fixed.
This greatly reduces the chance of
circuit overload and fire caused by
electrical problems.
Fuses and circuit breakers protect
the following in the vehicle:
.Headlamp Wiring
.Windshield Wiper Motor
.Power Windows and other
Power Accessories
Headlamp Wiring
An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have the
headlamp wiring checked right
away if the lamps go on and off or
remain off.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.
Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice, may
cause wiper linkage damage.
Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.
Fuses and Circuit
Breakers
The wiring circuits in the vehicle are
protected from short circuits by
fuses. This greatly reduces the
chance of circuit overload and fire
caused by electrical problems.
There are two fuse blocks—the
engine compartment fuse block, and
the instrument panel fuse block.
To identify and check fuses and
relays, refer to the Fuse Usage
Chart on the inside surface of the
fuse panel door.
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10-38 Vehicle Care
Engine Compartment
Fuse Block
The engine compartment fuse block
is located on the driver side of the
engine compartment, near the
battery.
Notice:Spilling liquid on any
electrical components on the
vehicle may damage it. Always
keep the covers on any electrical
component.
Fuses Usage
FAN MAIN Cooling Fan Main
REAR/WPR Rear Wiper Motor
FAN AUX Cooling Fan
Auxiliary Fuses
Usage
ECM/
TCM/SGCM Engine Control
Module/
Transmission
Control Module/
Serial Data Gateway
Communication
Module
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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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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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10-56 Vehicle Care
TPMS Sensor Matching
Process
Each TPMS sensor has a unique
identification code. Any time you
replace one or more of the TPMS
sensors or rotate the vehicle's tires,
the identification codes will need to
be matched to the new tire/wheel
position. The sensors are matched,
to the tire/wheel positions, in the
following order: driver side front tire,
passenger side front tire, passenger
side rear tire, and driver side rear
tire using a TPMS diagnostic tool.
See your dealer/retailer for service.
The TPMS sensors can also be
matched to each tire/wheel position
by increasing or decreasing the
tire's air pressure. When increasing
the tire's pressure, do not exceed
the maximum inflation pressure
indicated on the tire's sidewall.To decrease the tire's air-pressure
use the pointed end of the valve
cap, a pencil-style air pressure
gage, or a key.
You have two minutes to match
each tire and wheel position. If it
takes longer than two minutes to
match any tire and wheel position,
the matching process stops and
you will need to start over.
The TPMS matching process is
outlined below:
1. Set the parking brake.
2. Turn the ignition switch to
ON/RUN with the engine off.
3. Press and hold the RKE transmitter's Lock and Unlock
buttons at the same time, for
about three seconds. The horn
will sound twice to indicate the
receiver is ready for the sensor
matching process to begin. 4. Start with the driver side front
tire. The driver side turn signal
lamp comes on.
5. Remove the valve cap from the tire's valve stem. Activate the
TPMS sensor by increasing or
decreasing the tire's air pressure
for five seconds, or until a horn
chirp sounds. The horn chirp,
which may take up to
30 seconds to sound, confirms
that the sensor identification
code has been matched to the
tire/wheel position.
6. Proceed to the passenger side front tire. The passenger side
front turn signal lamp comes on.
Repeat the procedure in Step 5.
7. Proceed to the passenger side rear tire. The passenger side
rear turn signal lamp comes on.
Repeat the procedure in Step 5.
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Vehicle Care 10-57
8. Proceed to the driver side reartire. The driver side rear turn
signal lamp comes on. Repeat
the procedure in Step 5.
The horn sounds two times to
indicate the sensor identification
code has been matched to the
driver side rear tire, and the
TPMS sensor matching process
is no longer active.
9. Turn the ignition switch to LOCK/OFF.
10. Set all four tires to the recommended air pressure
level as indicated on the Tire
and Loading Information label.
11. Put the valve caps back on the valve stems.Tire Inspection
We recommend that you
regularly inspect your vehicle's
tires, including the spare tire,
if the vehicle has one, for signs
of wear or damage. See When It
Is Time for New Tires
on
page 10‑58
for more information.
Tire Rotation
Tires should be rotated every
8 000 to 13 000 km (5,000 to
8,000 miles). See Scheduled
Maintenance
on page 11‑2.
The purpose of a regular tire
rotation is to achieve a uniform
wear for all tires on the vehicle.
This will ensure that the vehicle
continues to perform most like it
did when the tires were new. Any time you notice unusual
wear, rotate the tires as soon
as possible and check wheel
alignment. Also check for
damaged tires or wheels.
See
When It Is Time for New
Tires
on page 10‑58and Wheel
Replacement
on page 10‑64.
When rotating the vehicle's tires,
always use the correct rotation
pattern shown here.
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