
#(Air Conditioning):Press to turn the air conditioning
on or off. A light above the button comes on while the
air conditioning is on.
When air conditioning is selected or in AUTO mode, the
system runs the air conditioning automatically to cool
and dehumidify the air entering the vehicle.
On hot days, open the windows long enough to let hot
inside air escape. This reduces the time it takes for
the vehicle to cool down. Then keep the windows closed
for the air conditioner to work its best.
On cool, but sunny days while using manual operation
of the automatic system, use bi-level to deliver warm
air to the floor and cooler air to the instrument
panel outlets. To warm or cool the air, press
xorwto
the desired temperature setting.
In AUTO mode the system cools and dehumidifies the
air inside the vehicle. Also, the system maximizes
its performance by using recirculation as necessary.
Heating:On cold days when using manual operation of
the automatic system, choose floor mode to deliver
air to the floor outlets. To warm or cool the air delivered,
adjust the temperature to the desired setting.
To use the automatic mode, turn the knob to AUTO and
adjust the temperature by pressing
xorw.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear):Press to turn the rear window defogger on
or off. An indicator light above the button comes on
to indicate that the rear window defogger is on.
If driving below 80 km/h (50 mph), the rear window
defogger turns off about 15 minutes after the button is
pressed. If turned on again, the defogger only runs
for about seven and one-half minutes before turning off.
If the vehicle’s speed is maintained above 50 mph
(80 km/h), the rear window defogger remains on once
the button is pressed.
If the vehicle has the remote start feature, the rear
defogger automatically turns on if it is cold outside, but
the indicator light does not come on. When the
vehicle transitions out of remote start mode the rear
defogger turns off.
Notice:Do not use a razor blade or sharp object to
clear the inside rear window. Do not adhere
anything to the defogger grid lines in the rear glass.
These actions may damage the rear defogger.
Repairs would not be covered by your warranty.
4-23

If No Steam Is Coming From The
Engine Compartment
If an engine overheat warning is displayed but no steam
can be seen or heard, the problem may not be too
serious. Sometimes the engine can get a little too hot
when the vehicle:
•Climbs a long hill on a hot day.
•Stops after high-speed driving.
•Idles for long periods in traffic.
•Tows a trailer.
If the overheat warning is displayed with no sign of
steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and
to the highest fan speed. Open the windows as
necessary.
3. In heavy traffic, let the engine idle in N (Neutral)
while stopped. If it is safe to do so, pull off the
road, shift to P (Park) or N (Neutral) and let
the engine idle.If the temperature overheat gage is no longer in the
overheat zone or an overheat warning no longer
displays, the vehicle can be driven. Continue to drive
the vehicle slow for about 10 minutes. Keep a safe
vehicle distance from the car in front of you. If the
warning does not come back on, continue to drive
normally.
If the warning continues, pull over, stop, and park the
vehicle right away.
If there is no sign of steam, idle the engine for
three minutes while parked. If the warning is still
displayed, turn off the engine until it cools down.
Also, see “Overheated Engine Protection Operating
Mode” next in this section.
6-36

(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 certified to carry. The speed
rating is the maximum speed a tire is certified
to carry a load.
Tire Terminology and De nitions
Air Pressure:The amount of air inside the
tire pressing outward on each square inch of
the tire. Air pressure is expressed in pounds
per square inch (psi) or kilopascal (kPa).
Accessory Weight
:This means the combined
weight of optional accessories. Some examples of
optional accessories are, automatic transmission,
power steering, power brakes, power windows,
power seats, and air conditioning.
Aspect Ratio
:The relationship of a tire’s height
to its width.
Belt
:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead
:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
6-61

Fuses Usage
EPS Electronic Power Steering
FUSE PULLER Fuse Puller
HVAC
BLOWERHeating Ventilation Air Conditioning
Blower Switch
HVAC
BLOWER HIGHHeating Ventilation Air Conditioning
Blower - High Speed Relay
HVAC CTRL
(BATT)Heating Ventilation Air Conditioning
Control Diagnostic Link Connector
(Battery)
HVAC CTRL
(IGN)Heating Ventilation Air Conditioning
Control (Ignition)
IGN SENSOR Ignition Switch
INTERIOR
LIGHTSInterior Lamps
NOT
INSTALLEDNot Used
NOT
INSTALLEDNot UsedFuses Usage
NOT
INSTALLEDNot Used
NOT
INSTALLEDNot Used
ONSTAR OnStar
®
PEDAL Not Used
POWER
MIRRORSPower Mirrors
POWER
WINDOWSPower Windows (Sedan)
RADIO Audio System
ROOF/HEAT
SEATSunroof, Heated Seat, Power
Windows (Coupe, Retractable
Hardtop), Automatic Dimming
Rearview Mirror, Compass
RUN/CRANKCruise Control Switch, Passenger
Airbag Status Indicator, DSC Switch
6-118

Fuses Usage
7 Left Headlamp Low Beam
8 Horn
9 Right Headlamp Low Beam
10 Front Fog Lamps
11 Left Headlamp High Beam
12 Right Headlamp High Beam
13 Engine Control Module (Battery)
14 Windshield Wiper
15 Antilock Brake System (IGN 1)
16 Engine Control Module (IGN 1)
17 Cooling Fan 1
18 Cooling Fan 2
19Run Relay, Heating, Ventilation,
Air Conditioning Blower
20 Body Control Module 1
21 Body Control Module Run/Crank
22 Rear Electrical Center 1
23 Rear Electrical Center 2
24 Antilock Brake System
25 Body Control Module 2Fuses Usage
26 Starter
41 Electric Power Steering
42Transmission Control Module
Battery
43Ignition Module (LE5, LE9, LZ4,
LZE, LZ9), Odd Cylinder
Injectors/Ignition Coils (LY7)
44Injectors (LE5, LE9, LZ4, LZE, LZ9),
Even Cylinder Injectors/Ignition
Coils (LY7)
45Rear Oxygen Sensors
(LZ4, LZE, LZ9, LY7)
46 Daytime Running Lamps
47 Center High-Mounted Stoplamp
50Front Power Windows Coupe/
Retractable Hardtop
51 Not Used
52 AIR Solenoid
54 Regulated Voltage Control
55 Antilock Brake System (Battery)
6-121

Relays Usage
28 Cooling Fan 1
29 Cooling Fan Series/Parallel
30 Cooling Fan 2
31 Starter
32 Run/Crank, Ignition
33 Powertrain
34 Air Conditioning Clutch
35 High Beam
36 Front Fog Lamps
37 Horn
38 Low Beam
39 Windshield Wiper 1
40 Windshield Wiper 2
48 Daytime Running Lamps
49 Center High-Mounted Stoplamp
53 AIR SolenoidDiodes Usage
27 Wiper
Rear Compartment Fuse Block
The rear compartment fuse block is located in the trunk
of the vehicle. Access the fuse block through the
trunk panel on the driver side of the rear cargo area.
6-122