2005 PONTIAC GTO air conditioning

Climate Controls
Climate Control System
With this system you can control the heating, cooling,
and ventilation for your vehicle.
Operation
To change the current mode, turn the right control to
select one of the following:
Y(Vent):This mode directs air to the instrument
panel outlets.
%(Bi-Level):This mode directs the air to the
instrument panel outlets and the floor outlets. This
position can be used for most winter driving.
[(Floor):This mode directs the air to the
floor outlets.
The right control can also be used to select defog or
defrost modes. Information on defogging and defrosting
can be found later in this section.
9(Fan):Turn the left control clockwise or
counterclockwise to increase or decrease the fan speed.
The fan must be on to run the air-conditioning
compressor.
>(Recirculation):This mode keeps outside air from
coming into the vehicle. It can be used to prevent
outside air and odors from entering your vehicle or to
help heat or cool the air inside your vehicle more quickly.
Move the right control to this position to turn recirculation
on. Turn the air conditioning on when using recirculation.
Recirculation is not recommended for use over long
periods of time.
Temperature Control:Turn the center control
clockwise or counterclockwise to increase or decrease
the temperature inside your vehicle.
3-19

A/C (Air Conditioning):Press this button on the left
dial to turn the air-conditioning system on or off.
When A/C is pressed, an indicator light in the button will
come on to let you know that air conditioning is
activated.
On hot days, open the windows to let hot inside air
escape; then close them. This helps to reduce the time
it takes for your vehicle to cool down. It also helps
the system to operate more efficiently.
For quick cool down on hot days, do the following:
1. Select the vent mode.
2. Select the highest fan speed.
3. Select A/C.
4. Select the coolest temperature.
The air-conditioning system removes moisture from the
air, so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling
or after turning off the engine. This is normal.Defogging and Defrosting
Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control system is
used properly. There are two modes to choose from to
clear fog or frost from your windshield. Use the
defog mode to clear the windows of fog or moisture and
warm the passengers. Use the defrost mode to
remove fog or frost from the windshield more quickly.
Turn the right control to select the defog or
defrost modes.
-(Defog):This mode directs the air to the windshield
and to the floor outlets. When you select this mode,
the system turns off recirculation automatically.
The recirculation mode cannot be selected while in the
defog mode. Do not drive the vehicle until all the
windows are clear.
To help clear the side windows quickly while using air
conditioning, do the following:
1. Select the bi-level mode.
2. Select the highest fan speed.
3. Select A/C.
4. Select the temperature.
3-20

2. If the fan is working and the temperature gage
needle has not returned to its normal position
within a few minutes, stop the engine and remove
the ignition key.
Look for leaks at the radiator hoses and
connections, heater hoses and connections,
radiator, and water pump. Be careful when checking
these areas as they will probably still be hot. If
you find a major leak or other problems that may
have caused the engine to overheat, do not run the
engine until these problems have been corrected.
If you do not find anything wrong, you should check
the engine coolant level. SeeEngine Coolant on
page 5-23. You should also check the air intake
area below the front bumper to ensure that it is clear
of leaves and road grime.3. Turn off your air conditioning and turn on your
heater to full hot at the highest fan speed and
open the windows as necessary.
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning does not come back on, you can drive
normally.
If the warning continues and you have not stopped, pull
over, stop, and park your vehicle right away.
If there is still no sign of steam, you can idle the engine
for three minutes while you are parked. If you still
have the warning, turn off the engine and get everyone
out of the vehicle until it cools down.
You may decide not to lift the hood but to get service
help right away.
5-28

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 range and speed rating of the tire. The load
index represents the load carry capacity a tire is certified
to carry. The load index can range from 1 to 279. The
speed rating is the maximum speed a tire is certified
to carry a load. Speed ratings range from A to Z.
Tire Terminology and Denitions
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.
5-56

Fuses Usage
ENG CONT.
BCMEngine, Body Control Module
FUEL PUMP Fuel Pump
RAD FAN 1 F/L Engine Cooling Fan 1
BLOWER F/L Blower Fan
MAIN F/L Main
ENGINE F/L Engine
ABS F/L Anti-lock Brakes
LIGHTING F/L Lighting
RAD FAN 2 F/L Engine Cooling Fan 2
REAR
WINDOWHeated Rear Window
SPARE Spare
SPARE Spare
ABS/TCSAnti-lock Brake System, Traction
Control System
Relays Usage
FUEL PUMP
RELAYFuel Pump
FOG LAMP
CANCEL
RELAYFog Lamp Cancel
FOG LAMP
RELAYFog Lamp
Relays Usage
BTSI RELAY Brake Transmission Shift Interlock
HIGH BEAM
RELAYHigh-Beam Headlamp
DAYTIME
RUNNING
LAMP RELAYDaytime Running Lamps
LOW BEAM
RELAYLow-Beam Headlamp
A/C RELAY Air Conditioning
HORN RELAY Horn
ENGINE COOL
FAN 2 RELAYEngine Cooling Fan 2
ENGINE COOL
FAN 1 RELAYEngine Cooling Fan 1
ENGINE COOL
FAN 3 RELAYEngine Cooling Fan 3
ENGINE
CONT. RELAYEngine Controls
HEATED REAR
WINDOW
RELAYRear Window Defogger
BLOWER
RELAYBlower
START RELAY Start
5-89

Capacities and Specications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricants on page 6-12for more information.
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134a 1.8 lbs 0.8 kg
Automatic Transmission (Drain and Refill) 5.3 quarts 5.0 L
Cooling System 12.7 quarts 12.0 L
Engine Oil with Filter (Drain and Refill) 6.5 quarts 6.2 L
Fuel Tank 18.5 gallons 70.0 L
Manual Transmission 4.6 quarts 4.4 L
Wheel Nut Torque 100 ft lb 140Y
All capacities are approximate. When adding, be sure to fill to the appropriate level, as recommended in this
manual. Recheck fluid level after filling
Engine Specications
Engine VIN Code Transmission Spark Plug Gap Firing Order
6.0L V8 (LS2) UAutomatic
Manual0.040 inch
(1.016 mm)1–8–7–2–6–5–4–3
5-90

Maintenance Footnotes
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chafing, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chafing, etc.
(c)Visually inspect hoses and have them replaced if
they are cracked, swollen, or deteriorated. Inspect
all pipes, fittings and clamps; replace with genuine
GM parts as needed. To help ensure proper operation,
a pressure test of the cooling system and pressure
cap and cleaning the outside of the radiator and
air conditioning condenser is recommended at least
once a year.
(d)Visually inspect wiper blades for wear or cracking.
Replace blade inserts that appear worn or damaged
or that streak or miss areas of the windshield.(e)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors, and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced. Also look for any opened or broken airbag
coverings, and have them repaired or replaced.
The airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders, door hinges and
latches, hood hinges and latches, and trunk lid hinges
and latches. More frequent lubrication may be required
when exposed to a corrosive environment. Applying
silicone grease on weatherstrips with a clean cloth will
make them last longer, seal better, and not stick or
squeak.
6-7

A
Accessory Power Outlets.................................3-17
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-85
Air Cleaner/Filter, Engine.................................5-18
Air Conditioning..............................................3-19
Airbag
Readiness Light..........................................3-25
Airbag Sensing and Diagnostic Module (SDM)...... 7-9
Airbag System................................................1-44
How Does an Airbag Restrain?......................1-48
Servicing Your Airbag-Equipped Vehicle..........1-50
What Makes an Airbag Inflate?......................1-48
What Will You See After an Airbag Inflates?....1-48
When Should an Airbag Inflate?....................1-47
Where Are the Airbags?...............................1-46
Antenna, Backglass.........................................3-58
Anti-Lock Brake System (ABS)........................... 4-6
Anti-Lock Brake, System Warning Light..............3-27
Appearance Care............................................5-76
Aluminum Wheels........................................5-81
Care of Safety Belts....................................5-79
Chemical Paint Spotting...............................5-83
Cleaning Exterior Lamps/Lenses....................5-80
Fabric/Carpet..............................................5-77
Finish Care.................................................5-80
Finish Damage............................................5-82Appearance Care (cont.)
Glass Surfaces............................................5-79
Instrument Panel.........................................5-79
Interior Plastic Components...........................5-79
Leather......................................................5-79
Sheet Metal Damage...................................5-82
Tires..........................................................5-82
Underbody Maintenance...............................5-83
Vehicle Care/Appearance Materials................5-84
Vinyl..........................................................5-78
Washing Your Vehicle...................................5-80
Weatherstrips..............................................5-80
Windshield and Wiper Blades........................5-81
Ashtrays........................................................3-18
Audio System(s).............................................3-45
Audio Steering Wheel Controls......................3-56
Backglass Antenna......................................3-58
Care of Your CD Player...............................3-57
Care of Your CDs........................................3-57
Radio with Six-Disc CD................................3-46
Setting the Time..........................................3-45
Theft-Deterrent Feature................................3-55
Understanding Radio Reception.....................3-57
Automatic Headlamp System............................3-14
Automatic Transmission
Fluid..........................................................5-19
Operation...................................................2-18
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