2007 PONTIAC G5 engine overheat

Your vehicle has a Computer-Controlled
Cranking System. This feature assists in
starting the engine and protects components.
If the ignition key is turned to the START
position, and then released when the engine
begins cranking, the engine will continue
cranking for a few seconds or until the vehicle
starts. If the engine does not start and the
key is held in START for many seconds,
cranking will be stopped after 15 seconds to
prevent cranking motor damage. To prevent
gear damage, this system also prevents
cranking if the engine is already running.
Engine cranking can be stopped by turning the
ignition switch to the ACC or LOCK position.
Notice:Cranking the engine for long periods
of time, by returning the key to the START
position immediately after cranking has ended,
can overheat and damage the cranking
motor, and drain the battery. Wait at least
15 seconds between each try, to allow
the cranking motor to cool down.2. If the engine does not start after 5-10 seconds,
especially in very cold weather (below 0°F
or−18°C), it could be ooded with too much
gasoline. Try pushing the accelerator
pedal all the way to the oor and holding it
there as you hold the key in START for up to
a maximum of 15 seconds. Wait at least
15 seconds between each try, to allow the
cranking motor to cool down. When the engine
starts, let go of the key and accelerator. If
the vehicle starts briey but then stops again,
do the same thing. This clears the extra
gasoline from the engine. Do not race the
engine immediately after starting it. Operate
the engine and transaxle gently
until the oil warms up and lubricates all
moving parts.
Notice:Your engine is designed to work with
the electronics in your vehicle. If you add
electrical parts or accessories, you could
change the way the engine operates. Before
adding electrical equipment, check with your
dealer. If you do not, your engine might not
perform properly. Any resulting damage would
not be covered by your vehicle’s warranty.
111

Engine Coolant Heater
Your vehicle may be equipped with an engine
coolant heater.
In very cold weather, 0°F (−18°C) or colder, the
engine coolant heater can help. You will get easier
starting and better fuel economy during engine
warm-up.
Usually, the coolant heater should be plugged in a
minimum of four hours prior to starting your
vehicle. At temperatures above 32°F (0°C), use of
the coolant heater is not required. Your vehicle
may also have an internal thermostat in the
plug end of the cord. This will prevent operation of
the engine coolant heater when the temperature
is at or above 0°F (−18°C) as noted on the cord.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical
cord. For the 2.2L and 2.4L engines, the
electrical cord is located on the passenger’s
side of the vehicle between the strut and
the air cleaner/lter.
3. Plug it into a normal, grounded 110-volt AC
outlet.
{CAUTION:
Plugging the cord into an ungrounded
outlet could cause an electrical shock.
Also, the wrong kind of extension cord
could overheat and cause a re. You could
be seriously injured. Plug the cord into a
properly grounded three-prong 110-volt AC
outlet. If the cord will not reach, use a
heavy-duty three-prong extension cord
rated for at least 15 amps.
4. Before starting the engine, be sure to unplug
and store the cord as it was before to keep it
away from moving engine parts. If you do not, it
could be damaged.
How long should you keep the coolant heater
plugged in? The answer depends on the outside
temperature, the kind of oil you have, and some
other things. Instead of trying to list everything here,
we ask that you contact a GM dealer in the area
where you will be parking your vehicle. The dealer
can give you the best advice for that particular area.
112

Leaving Your Vehicle With the Engine
Running
{CAUTION:
It can be dangerous to leave your vehicle
with the engine running. Your vehicle
could move suddenly if the shift lever is
not fully in PARK (P) with the parking
brake rmly set. And, if you leave the
vehicle with the engine running, it could
overheat and even catch re. You or
others could be injured. Do not leave your
vehicle with the engine running.
If you have to leave your vehicle with the engine
running, be sure your vehicle is in PARK (P)
and your parking brake is rmly set before you
leave it. After you have moved the shift lever into
PARK (P), hold the regular brake pedal down.
Then, see if you can move the shift lever
away from PARK (P) without rst pushing the
button. If you can, it means that the shift lever was
not fully locked into PARK (P).
Torque Lock
If you are parking on a hill and you do not shift
your transaxle into PARK (P) properly, the weight
of the vehicle may put too much force on the
parking pawl in the transaxle. You may nd
it difficult to pull the shift lever out of PARK (P).
This is called “torque lock.” To prevent torque lock,
set the parking brake and then shift into PARK (P)
properly before you leave the driver’s seat. To
nd out how, seeShifting Into Park (P) (Automatic
Transaxle) on page 119.
When you are ready to drive, move the shift lever
out of PARK (P)beforeyou release the parking
brake.
If torque lock does occur, you may need to have
another vehicle push yours a little uphill to
take some of the pressure from the parking pawl
in the transaxle, then you will be able to pull
the shift lever out of PARK (P).
120

The Enhanced Traction System warning light may
come on for the following reasons:
If you turn the system off by moving the shift
lever to LOW (L), the warning light will come on
and stay on. To turn the system back on, move
the shift lever back to a position other than
LOW (L). The warning light should go off.
SeeEnhanced Traction System (ETS) on
page 226for more information.
The warning light will come on when you set
your parking brake with the engine running, and
it will stay on if your parking brake does not
release fully. If the transaxle shift lever is in any
position other than LOW (L) and the warning
light stays on after your parking brake is fully
released, it means there is a problem with the
system.
If the traction control system is affected by an
engine-related problem, the system will turn off
and the warning light will come on.
If the Enhanced Traction System warning light
comes on and stays on for an extended period of
time when the transaxle shift lever is in any position
other than LOW (L), your vehicle needs service.
Engine Coolant Temperature
Warning Light
The engine coolant
temperature warning
light will come on
when the engine has
overheated.
If this happens you should pull over and turn off
the engine as soon as possible. SeeEngine
Overheating on page 290for more information.
Notice:Driving with the engine coolant
temperature warning light on could cause your
vehicle to overheat. SeeEngine Overheating on
page 290. Your vehicle could be damaged, and
it might not be covered by your warranty. Never
drive with the engine coolant temperature
warning light on.
This light will also come on when starting your
vehicle. If it doesn’t, have your vehicle serviced.
167

If Your Vehicle is Stuck in Sand,
Mud, Ice, or Snow
In order to free your vehicle when it is stuck, you
will need to spin the wheels, but you do not
want to spin your wheels too fast. The method
known as rocking can help you get out when you
are stuck, but you must use caution.
{CAUTION:
If you let your vehicle’s tires spin at high
speed, they can explode, and you or others
could be injured. And, the transaxle or
other parts of the vehicle can overheat.
That could cause an engine compartment
re or other damage. When you are stuck,
spin the wheels as little as possible. Do not
spin the wheels above 35 mph (55 km/h) as
shown on the speedometer.Notice:Spinning the wheels can destroy parts
of your vehicle as well as the tires. If you
spin the wheels too fast while shifting
the transaxle back and forth, you can destroy
the transaxle. SeeRocking Your Vehicle to
Get It Out on page 248.
For information about using tire chains on your
vehicle, seeTire Chains on page 336.
Rocking Your Vehicle to Get It Out
First, turn the steering wheel left and right.
That will clear the area around the front wheels.
Then shift back and forth between REVERSE (R)
and a forward gear, or with a manual transaxle,
between FIRST (1) or SECOND (2) and
REVERSE (R), spinning the wheels as little as
possible. Release the accelerator pedal while you
shift, and press lightly on the accelerator pedal
when the transaxle is in gear. By slowly spinning
the wheels in the forward and reverse directions,
you will cause a rocking motion that may free your
vehicle. If that does not get your vehicle out
after a few tries, it may need to be towed out.
If your vehicle does need to be towed out,
seeTowing Your Vehicle on page 254.
248

Making Turns
Notice:Making very sharp turns while
trailering could cause the trailer to come in
contact with the vehicle. Your vehicle could be
damaged. Avoid making very sharp turns
while trailering.
When you are turning with a trailer, make wider
turns than normal. Do this so your trailer will not
strike soft shoulders, curbs, road signs, trees or
other objects. Avoid jerky or sudden maneuvers.
Signal well in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle may need a
different turn signal asher and/or extra wiring.
Check with your dealer. The arrows on your
instrument panel will ash whenever you
signal a turn or lane change. Properly hooked up,
the trailer lamps will also ash, telling other
drivers you are about to turn, change lanes
or stop.When towing a trailer, the arrows on your
instrument panel will ash for turns even if the bulbs
on the trailer are burned out. Thus, you may think
drivers behind you are seeing your 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 transaxle
temperatures may result and damage your
vehicle. Frequent stops are very important to
allow the engine and transaxle to cool.
Reduce speed and shift to a lower gearbefore
you start down a long or steep downgrade. If you
do not shift down, you might have to use your
brakes so much that they would get hot and
no longer work well.
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 290.
262

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal
down while you:
Start your 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
Your vehicle will need service more often when
you are pulling a trailer. SeeScheduled
Maintenance on page 375for more on this.
Things that are especially important in trailer
operation are automatic transaxle 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 you nd them quickly. If you
are trailering, it is a good idea to review this
information before you start your trip.
Check periodically to see that all hitch nuts and
bolts are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat
during severe operating conditions. SeeEngine
Overheating on page 290.
264

Service........................................................ 268
Accessories and Modications................... 268
California Proposition 65 Warning.............. 269
Doing Your Own Service Work.................. 269
Adding Equipment to the Outside of
Your Vehicle.......................................... 270
Fuel............................................................. 270
Gasoline Octane........................................ 270
Gasoline Specications.............................. 271
California Fuel........................................... 271
Additives................................................... 272
Fuels in Foreign Countries........................ 273
Filling the Tank......................................... 274
Filling a Portable Fuel Container............... 276
Checking Things Under the Hood.............. 276
Hood Release........................................... 277
Engine Compartment Overview.................. 278
Engine Oil................................................. 279
Engine Oil Life System.............................. 282
Engine Air Cleaner/Filter............................ 284
Automatic Transaxle Fluid......................... 286
Manual Transaxle Fluid............................. 286
Hydraulic Clutch........................................ 286Engine Coolant.......................................... 287
Coolant Surge Tank Pressure Cap............ 290
Engine Overheating................................... 290
Cooling System......................................... 292
Windshield Washer Fluid........................... 297
Brakes...................................................... 298
Battery...................................................... 303
Jump Starting............................................ 304
Headlamp Aiming........................................ 309
Bulb Replacement....................................... 312
Halogen Bulbs........................................... 312
Headlamps, Front Turn Signal,
Sidemarker, and Parking Lamps............. 313
Center High-Mounted Stoplamp
(CHMSL)................................................ 315
Taillamps and Turn Signal Lamps
(Coupe)................................................. 316
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps (Sedan)......................... 316
Back-Up Lamps (Coupe)........................... 317
License Plate Lamp................................... 318
Replacement Bulbs................................... 318
Section 5 Service and Appearance Care
265