2005 PONTIAC GTO fuel

The coolant level should be checked at each fuel fill, by
looking at the dipstick in the coolant overflow reservoir.
To remove the dipstick, push down on the coolant
reservoir cap while turning it counterclockwise.
When your engine is cold, the coolant level should be at
or above the bottom arrow on the dipstick. After the
vehicle has been driven and the engine is at normal
operating temperature, the level should be somewhere
between the two arrows on the dipstick.
If the coolant level is correct, replace the dipstick then
push down on the coolant reservoir cap while turning
it clockwise until it stops, to lock it into position.
Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixture at the coolant overflow reservoir, but
be careful not to spill it. Check the level with the dipstick
and keep adding fluid until the level is correct.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
When the level is correct, replace the dipstick then push
down on the coolant reservoir cap while turning it
clockwise until it stops, to lock it into position.
5-25

Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim has been preset at the factory and
should need no further adjustment
However, if the vehicle is damaged in an accident, the
headlamp aim may be affected and adjustment may
be necessary.
If oncoming vehicles flash their high beams at you, this
may also mean the vertical aim needs to be adjusted.
It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be re-aimed.
It is possible however, to re-aim the headlamps as
described in the following procedure.
The vehicle should be properly prepared as follows:
•The vehicle should be placed so the headlamps
are 15 ft. (4.6 m) from a light colored wall or
other flat surface.
•The vehicle must have all four tires on a perfectly
level surface which is level all the way to the wall
or other flat surface.
•The vehicle should be placed so it is perpendicular
to the wall or other flat surface.
•The vehicle should not have any snow, ice, or mud
on it.
•The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being
performed.
•The vehicle should be normally loaded with a full
tank of fuel and one person or 160 lbs (75 kg)
sitting on the driver’s seat.
•Tires should be properly inflated.
•The spare tire is in its original location in
the vehicle.
Headlamp aiming is done with the vehicle’s low-beam
headlamps. The high-beam headlamps will be correctly
aimed if the low-beam headlamps are aimed properly.
5-45

Bias Ply Tire:A pneumatic tire in which the plies are
laid at alternate angles less than 90 degrees to the
centerline of the tread.
Cold Ination Pressure:The amount of air pressure in
a tire, measured in pounds per square inch (psi) or
kilopascals (kPa) before a tire has built up heat
from driving. SeeInflation - Tire Pressure on page 5-59.
Curb Weight:This means the weight of a motor
vehicle with standard and optional equipment including
the maximum capacity of fuel, oil and coolant, but
without passengers and cargo.
DOT Markings:A code molded into the sidewall of a
tire signifying that the tire is in compliance with the
U.S. Department of Transportation (DOT) motor vehicle
safety standards. The DOT code includes the Tire
Identification Number (TIN), an alphanumeric designator
which can also identify the tire manufacturer, production
plant, brand and date of production.
GVWR:Gross Vehicle Weight Rating, seeLoading
Your Vehicle on page 4-29.
GAWR FRT:Gross Axle Weight Rating for the front
axle, seeLoading Your Vehicle on page 4-29.
GAWR RR:Gross Axle Weight Rating for the rear axle,
seeLoading Your Vehicle on page 4-29.Intended Outboard Sidewall:The side of an
asymmetrical tire, that must always face outward when
mounted on a vehicle.
Kilopascal (kPa):The metric unit for air pressure.
Light Truck (LT-Metric) Tire:A tire used on light duty
trucks and some multipurpose passenger vehicles.
Load Index:An assigned number ranging from
1 to 279 that corresponds to the load carrying capacity
of a tire.
Maximum Ination Pressure:The maximum air
pressure to which a cold tire may be inflated. The
maximum air pressure is molded onto the sidewall.
Maximum Load Rating:The load rating for a tire at the
maximum permissible inflation pressure for that tire.
Maximum Loaded Vehicle Weight:The sum of curb
weight; accessory weight; vehicle capacity weight;
and production options weight.
Normal Occupant Weight:The number of occupants a
vehicle is designed to seat multiplied by 150 lbs (68 kg).
SeeLoading Your Vehicle on page 4-29.
Occupant Distribution:Designated seating positions.
5-57

Ination - Tire Pressure
Tires need the correct amount of air pressure to operate
effectively.
Notice:Do not let anyone tell you that
under-ination or over-ination is all right. It is not.
If your tires do not have enough air (under-ination),
you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economyIf your tires have too much air (over-ination), you
can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazards
A Tire and Loading Information label is attached to your
vehicle’s center pillar, below the driver’s door latch.
This label lists your vehicle’s original equipment
tires and their recommended cold tire inflation pressures.
The recommended cold tire inflation pressure, shown
on the label, is the minimum amount of air pressure
needed to support your vehicle’s maximum load carrying
capacity. For more information regarding how much
weight your vehicle can carry, seeLoading Your Vehicle
on page 4-29.
5-59

Underbody Maintenance
Chemicals used for ice and snow removal and dust
control can collect on the underbody. If these are not
removed, corrosion and rust can develop on the
underbody parts such as fuel lines, frame, floor pan,
and exhaust system even though they have corrosion
protection.
At least every spring, flush these materials from the
underbody with plain water. Clean any areas where mud
and debris can collect. Dirt packed in close areas of
the frame should be loosened before being flushed.
Your GM dealer or an underbody car washing system
can do this for you.
Chemical Paint Spotting
Some weather and atmospheric conditions can create a
chemical fallout. Airborne pollutants can fall upon and
attack painted surfaces on the vehicle. This damage can
take two forms: blotchy, ring-shaped discolorations,
and small, irregular dark spots etched into the
paint surface.
Although no defect in the paint job causes this, GM will
repair, at no charge to the owner, the surfaces of
new vehicles damaged by this fallout condition within
12 months or 12,000 miles (20 000 km) of purchase,
whichever occurs first.
5-83

Relays Usage
ACC RELAY Accessory Power Outlet
IGNITION
RELAYIgnition Switch
POWER
WINDOW
RELAYPower Windows
BLOWER
INHIBIT RELAYBlower
PARK LAMPS
RELAYParking Lamps
SPARE Spare
INTERIOR
ILLUM RELAYInterior Light Controls
ECM/TCM
CONTROL
RELAY 1Engine Control Module,
Transmission Control Module 1
ECM/TCM
CONTROL
RELAY 2Engine Control Module,
Transmission Control Module 2
SPARE SpareEngine Compartment Fuse Block
The engine compartment fuse block is located in
the engine compartment and protects all electrical loads.
SeeEngine Compartment Overview on page 5-12for
more information on location.
For access to the main fuses, pull off the cover.
Fuses Usage
INJ/IGN Fuel Injectors and Ignition Modules
INJ/IGN Fuel Injectors and Ignition Modules
ENG
SENSORSEngine Sensors
AUTO TRANS Automatic Transmission
LH HEADLAMP Left Headlamp
RH
HEADLAMPRight Headlamp
5-88

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