2009 PONTIAC G5 engine overheating

If the TCS is disabled, wheel spin is not limited. If the
ESC system is disabled, the system does not aid
in maintaining directional control of the vehicle.
If the indicator/warning light is on and ashing,
the TCS or the ESC system is actively working.
Check the DIC messaging for details to determine
which system is working. If the LOW TRACTION
message appears, the system is limiting wheel spin.
If the ESC ACTIVE message appears, the system
is aiding in maintaining directional control of the vehicle.
SeeElectronic Stability Control (ESC) on page 4-6
andTraction Control System (TCS) on page 4-7
for more information.
SeeDIC Warnings and Messages on page 3-42for
more information on the messages associated with
this light.Engine Coolant Temperature
Warning Light
This light comes on briey
while starting the vehicle.
If it does not, have the vehicle serviced by the
dealer/retailer. If the system is working normally
the indicator light goes off.
Notice:Driving with the engine coolant temperature
warning light on could cause the vehicle to overheat.
SeeEngine Overheating on page 5-27. The vehicle’s
engine could be damaged, and it might not be
covered by the vehicle warranty. Never drive with
the engine coolant temperature warning light on.
The engine coolant temperature warning light comes on
when the engine has overheated.
If this happens pull over and turn off the engine as soon
as possible. SeeEngine Overheating on page 5-27
for more information.
3-32

Turn Signals When Towing a Trailer
The arrows on the instrument panel ash whenever
signaling a turn or lane change. Properly hooked up, the
trailer lamps also ash, telling other drivers the vehicle
is turning, changing lanes or stopping.
When towing a trailer, the arrows on the instrument panel
ash for turns even if the bulbs on the trailer are burned
out. For this reason you may think other drivers are
seeing the signal when they are not. It is important to
check occasionally to be sure the trailer bulbs are still
working.
Driving on Grades
Notice:Do not tow on steep continuous grades
exceeding 6 miles (9.6 km). Extended, higher than
normal engine and transmission temperatures may
result and damage the vehicle. Frequent stops are
very important to allow the engine and transmission
to cool.
Reduce speed and shift to a lower gearbeforestarting
down a long or steep downgrade. If the transmission is
not shifted down, the brakes might have to be used so
much that they would get hot and no longer work well.On a long uphill grade, shift down and reduce the
vehicle’s speed to around 45 mph (70 km/h) to reduce
the possibility of the engine and the transmission
overheating.
Vehicles can tow in D (Drive). Shift the transmission to
a lower gear if the transmission shifts too often under
heavy loads and/or hilly conditions.
Pay attention to the engine coolant gage. If the indicator
is in the red area, turn off the air conditioning to reduce
engine load. SeeEngine Overheating on page 5-27.
When towing under severe conditions such as hot
ambient temperatures or steep grades, the vehicle may
experience more transmission shifting. A COOLING
MODE ON message may also appear in the DIC. This
alerts the driver that the shifting mode is in progress
and is aiding engine cooling. SeeDIC Warnings and
Messages on page 3-42DIC Warnings and Messages
for more information.
4-36

Leaving After Parking on a Hill
1. Apply the regular brakes and hold the pedal down
while you:
Start the engine.
Shift into a gear.
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the
chocks.
Maintenance When Trailer Towing
The vehicle needs service more often when pulling a
trailer. SeeScheduled Maintenance on page 6-4for more
on this. Things that are especially important in trailer
operation are automatic transmission uid (do not
overll), engine oil, drive belt, cooling system and brake
system.Each of these is covered in this manual, and the Index
will help to nd them quickly. When trailering, it is a good
idea to review this information before starting the trip.
Check periodically to see that all hitch nuts and bolts are
tight.
Engine Cooling When Trailer Towing
The cooling system may temporarily overheat during
severe operating conditions. SeeEngine Overheating on
page 5-27.
Towing a Trailer (Manual
Transmission)
Do not tow a trailer if the vehicle is equipped with a
manual transmission.
4-38

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-4
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of the
Vehicle......................................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-6
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling the Tank..............................................5-8
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-13
Engine Oil Life System..................................5-16
Engine Air Cleaner/Filter................................5-18
Automatic Transmission Fluid.........................5-19
Hydraulic Clutch...........................................5-19
Cooling System............................................5-20
Engine Coolant.............................................5-24
Coolant Surge Tank Pressure Cap..................5-27Engine Overheating.......................................5-27
Windshield Washer Fluid................................5-29
Brakes........................................................5-30
Battery........................................................5-33
Jump Starting...............................................5-34
Headlamp Aiming...........................................5-38
Bulb Replacement..........................................5-41
Halogen Bulbs..............................................5-41
Headlamps, Front Turn Signal, Sidemarker,
and Parking Lamps....................................5-42
Center High-Mounted Stoplamp (CHMSL).........5-43
Taillamps and Turn Signal Lamps (Coupe).......5-44
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps (Sedan).............................5-44
Back-Up Lamps (Coupe)................................5-46
License Plate Lamp......................................5-46
Replacement Bulbs.......................................5-47
Windshield Wiper Blade Replacement..............5-47
Tires..............................................................5-48
Tire Sidewall Labeling...................................5-49
Tire Terminology and Denitions.....................5-52
Ination - Tire Pressure.................................5-55
Tire Pressure Monitor System.........................5-56
Tire Pressure Monitor Operation.....................5-58
Tire Inspection and Rotation...........................5-63
Section 5 Service and Appearance Care
5-1

{CAUTION:
Heater and radiator hoses, and other engine parts,
can be very hot. Do not touch them. If you do, you
can be burned.
Do not run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine re, and you could be burned.
Get any leak xed before you drive the vehicle.
If there seems to be no leak, with the engine on,
check to see if the electric engine cooling fan is running.
If the engine is overheating, the fan should be running.
If it is not, your vehicle needs service.Notice:Engine damage from running the engine
without coolant is not covered by the warranty.
Notice:Using coolant other than DEX-COOL
®can
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant could
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by the vehicle warranty.
Always use DEX-COOL
®(silicate-free) coolant in
the vehicle.
5-21

3. Fill the coolant surge tank with the proper mixture, to
the COLD FILL line. Wait about ve minutes, then
check to see if the level is below the COLD FILL line.
If the level is below the line, add additional coolant to
bring the level up to the line. Repeat this procedure
until the level remains constant at the COLD FILL
line for at least ve minutes.
4. With the coolant surge tank pressure cap off, start
the engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the engine
cooling fan.By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower than the
COLD FILL line, add more of the proper mixture to
the coolant surge tank until the level reaches the
COLD FILL line.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
See your dealer/retailer, if necessary.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is designed
to remain in your vehicle for ve years or 150,000 miles
(240 000 km), whichever occurs rst, if you add only
DEX-COOL
®extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, seeEngine Overheating on
page 5-27.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as they
should.
5-24

Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixture at the coolant surge tank, but only
when the engine is cool. If the coolant surge tank is
empty, a special ll procedure is necessary. SeeEngine
Overheating on page 5-27for instructions on “How to
Add Coolant to the Coolant Surge Tank.”
{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 replacing the pressure cap, make sure it is
hand-tight and fully seated.
Coolant Surge Tank Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. SeeEngine
Compartment Overview on page 5-12for more
information on location.
Engine Overheating
You will nd an engine coolant temperature warning
light on your vehicle’s instrument panel. SeeEngine
Coolant Temperature Warning Light on page 3-32for
more information.
5-27

Driving (cont.)
Off-Road Recovery......................................4-13
Rocking Your Vehicle to Get it Out.................4-22
Winter........................................................4-19
Driving for Better Fuel Economy......................... 4-2
E
Easy Entry Seat............................................... 1-8
EDR .............................................................7-17
Electrical Equipment
Add-On Equipment.....................................5-102
Electrical System
Engine Compartment Fuse Block.................5-105
Floor Console Fuse Block...........................5-104
Fuses and Circuit Breakers.........................5-103
Headlamp Wiring.......................................5-103
Power Windows and Other Power Options....5-103
Windshield Wiper Fuses.............................5-103
Electronic Immobilizer
PASS-Key
®III+...........................................2-18
Electronic Immobilizer Operation
PASS-Key
®III+...........................................2-19
Electronic Stability Control................................. 4-6
Electronic Stability Control Indicator Light...........3-31
Engine
Air Cleaner/Filter.........................................5-18
Check and Service Engine Soon Lamp...........3-33
Compartment Overview................................5-12Engine (cont.)
Coolant......................................................5-24
Coolant Heater............................................2-25
Coolant Temperature Warning Light................3-32
Cooling System...........................................5-20
Drive Belt Routing.......................................6-15
Exhaust.....................................................2-34
Oil .............................................................5-13
Oil Life System...........................................5-16
Overheating................................................5-27
Starting......................................................2-24
Enhanced Traction System (ETS) Active Light.....4-10
Enhanced Traction System (ETS) Indicator/
Warning Light.............................................3-31
Entry/Exit Lighting...........................................3-15
Event Data Recorders.....................................7-18
Extender, Safety Belt.......................................1-28
F
Filter
Engine Air Cleaner......................................5-18
Finish Damage.............................................5-101
Fixed Mast Antenna........................................3-87
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-71
Flat Tire, Changing.........................................5-80
5