2010 PONTIAC G6 coolant level

9(Fan Control):Turn the knob clockwise or
counterclockwise to increase or decrease the fan speed.
The fan must be on to run the air conditioning
compressor.
Temperature Control:Turn the knob clockwise or
counterclockwise to increase or decrease the
temperature inside the vehicle.
When it is cold outside−18°C (0°F) or lower, use the
engine coolant heater, if the vehicle has one, to quickly
provide warmer air. An engine coolant heater warms
coolant that the engine uses to warm the inside of the
vehicle. For more information, seeEngine Coolant
Heater on page 3-23.
Air Delivery Mode Control:Turn the knob clockwise
or counterclockwise to change the air delivery settings.
Select from the following modes:
H(Vent):Air is directed to the instrument panel
outlets.
)(Bi-Level):Air is divided between the air to the
instrument panel and floor outlets. Some air may
be directed toward the side windows.
6(Floor):Air is directed to the floor outlets with
some air directed to the side window outlets and
windshield.
-(Defog):This mode clears the windows of fog or
moisture. Air is directed to the windshield and floor
outlets, with some air directed to the side windows.
When this mode is selected, the system automatically
turns off recirculation and tuns the air conditioning
compressor unless the outside temperature is at
or below freezing. The air conditioning compressor
operates although the indicator light is not on. The air
conditioning indicator light turns off when defog is
selected. If the air conditioning button is pressed while
in defog mode, the indicator light turns on. If the
button is pressed again, the light turns off. The
recirculation mode cannot be selected while in the defog
mode. Do not drive the vehicle until all the windows
are clear.
1(Defrost):This mode clears the windshield of fog
or frost more quickly. Air is directed to the windshield,
with some air directed to the floor vents. In this
mode, the system automatically forces outside air into
the vehicle. The air conditioning compressor runs unless
the outside temperature is at or below freezing. The
air conditioning compressor operates although the
indicator light is not on. The air conditioning indicator
light turns off when defrost is selected. If the air
conditioning button is pressed while in defrost mode, the
indicator light turns on. If the button is pressed again,
the light turns off. Recirculation cannot be selected while
in the defrost mode.
4-17

Also be careful not to cover the sensor grille on the
lower right side of the climate control faceplate.
This senses the inside vehicle temperature needed
for proper regulation.
To avoid blowing cold air at start-up in cold weather,
the system delays turning on the fan until warm
air is available. The length of delay depends on the
engine coolant temperature. Turning the fan
knob overrides this delay and change the fan to a
selected speed.
If the vehicle has the remote start feature, the climate
control display initially shows “RS” in place of the
temperature to indicate the remote start has been
activated. The remote start system turns on using the
last temperature selected before the vehicle was
last turned off.
For best performance, turn the fan and mode knobs to
the AUTO position. The fan speed and air delivery
modes will change to achieve the best comfort.
If the outside air temperature is below 7°C (45°F) and
the air delivery mode knob is set to AUTO, the automatic
climate control system starts in the defrost mode to
clear the window.
The automatic climate control changes back to manual
operation by turning the vehicle on with the key.Manual Operation
The air delivery mode or fan speed can be manually
adjusted.
9(Off):Turns off the entire climate control system.
Outside air still enters the vehicle, and is directed to the
floor. This direction can be changed by adjusting the
air delivery mode position.
9(Fan Control):Turn the knob clockwise or
counterclockwise to increase or decrease the fan speed.
xwTemperature Control:Press the up and down
arrows to increase or decrease the temperature
inside the vehicle.
Air Delivery Mode Control:Turn the knob clockwise
or counterclockwise to change the air delivery settings.
Select from the following modes:
H(Vent):Air is directed to the instrument panel
outlets.
)(Bi-Level):Air is divided between the instrument
panel and floor outlets.
4-21

A.Engine Air Cleaner/Filter on page 6-26.
B.Power Steering Fluid on page 6-37.
C. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 6-21.
D. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 6-21.
E. Electric Engine Cooling Fans (Out of View).
SeeCooling System on page 6-30.
F. Engine Coolant Surge Tank. SeeEngine Coolant on
page 6-31.
G. Pressure Cap. SeeCooling System on page 6-30.
H. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 6-39.
I. Automatic Transmission Fluid Cap/Dipstick
(Out of View). See “Checking the Fluid Level”
underAutomatic Transmission Fluid (2.4L L4, 3.5L V6
and 3.6L V6 Engines) on page 6-27orAutomatic
Transmission Fluid (3.9L V6 Engine) on page 6-28.
J.Battery on page 6-42.
K. Underhood Fuse Block. SeeEngine Compartment
Fuse Block on page 6-119.
L. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 6-38.Engine Oil
Checking Engine Oil
It is a good idea to check the engine oil level at each
fuel fill. In order to get an accurate reading, the oil must
be warm and the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop.
SeeEngine Compartment Overview on page 6-16
for the location of the engine oil dipstick.
1. Turn off the engine and give the oil several minutes
to drain back into the oil pan. If this is not done,
the oil dipstick might not show the actual level.
2. Pull the dipstick and clean it with a paper towel or
cloth, then push it back in all the way. Remove it
again, keeping the tip down and check the level.
6-21

How to Add Automatic Transmission
Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission fluid to use. SeeRecommended
Fluids and Lubricants on page 7-10.
If the fluid level is low, add only enough of the proper
fluid to bring the level into the crosshatched area on
the dipstick.
1. Remove the dipstick.
2. Using a long-neck funnel, add enough fluid at the
dipstick hole to bring it to the proper level.
It does not take much fluid, generally less than a
half pint (0.24 L). Do not overfill.
Notice:Use of the incorrect automatic transmission
uid may damage the vehicle, and the damages
may not be covered by the vehicle’s warranty.
Always use the automatic transmission uid listed
inRecommended Fluids and Lubricants on
page 7-10.
3. After adding fluid, recheck the fluid level as
described under “How to Check Automatic
Transmission Fluid” earlier in this section.
4. When the correct fluid level is obtained, reinstall the
dipstick back in all the way.
Cooling System
The cooling system allows the engine to maintain the
correct working temperature.
A. Engine Cooling Fans
B. Engine Coolant Surge Tank
C. Pressure Cap3.6L V6 Engine shown, 2.4L L4, 3.5L,
3.9L Engines similar
6-30

What to Use
{WARNING:
Adding only plain water to the cooling system can
be dangerous. Plain water, or some other liquid
such as alcohol, can boil before the proper coolant
mixture will. The vehicle’s coolant warning system
is set for the proper coolant mixture. With plain
water or the wrong mixture, the engine could get
too hot but you would not get the overheat
warning. The engine could catch fire and you or
others could be burned. Use a 50/50 mixture of
clean, drinkable water and DEX-COOL
®coolant.
Use a 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant. If using this mixture, nothing
else needs to be added. This mixture:
•Gives freezing protection down to−37°C (−34°F),
outside temperature.
•Gives boiling protection up to 129°C (265°F),
engine temperature.
•Protects against rust and corrosion.
•Will not damage aluminum parts.
•Helps keep the proper engine temperature.Notice:If an improper coolant mixture is used,
the engine could overheat and be badly damaged.
The repair cost would not be covered by the vehicle
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core, and
other parts.
Notice:If extra inhibitors and/or additives are used
in the vehicle’s cooling system, the vehicle could
be damaged. Use only the proper mixture of
the engine coolant listed in this manual for the
cooling system. SeeRecommended Fluids and
Lubricants on page 7-10for more information.
Checking Coolant
The vehicle must be on a level surface when checking
the coolant level.
Check to see if coolant is visible in the coolant recovery
tank. If the coolant inside the coolant recovery tank
is boiling, do not do anything else until it cools down.
If coolant is visible but the coolant level is not at or above
the FULL COLD mark, add a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant at the coolant
recovery tank, but be sure the cooling system is cool
before this is done. See Engine Coolant for more
information.
The coolant level should be at or above the FULL COLD
mark on the coolant surge tank. If it is not, you may have
a leak in the cooling system.
6-32

2. Keep turning the
pressure cap slowly
and remove it.
3. Fill the coolant surge tank with the proper mixture
to the FULL COLD mark. Wait about five minutes
and then check to see if the level is below the mark.
If the level is below the FULL COLD mark, add
additional coolant to bring the level up to the mark.
Repeat this procedure until the level remains
constant at the FULL COLD mark for at least
five 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 fans.
By this time, the coolant level inside the coolant
surge tank might be lower. If the level is lower than
the FULL COLD mark, add more of the proper
mixture to the coolant surge tank until the level
reaches the FULL COLD mark.
5. Replace the pressure cap. Be sure the pressure
cap is hand-tight and fully seated.
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.
If coolant is needed, add the proper DEX-COOL
®
coolant mixture at the coolant recovery tank.
6-34

Engine Overheating
The vehicle has an indicator to warn of engine
overheating.
There is an engine coolant temperature gage on
the instrument panel cluster. SeeEngine Coolant
Temperature Gage on page 4-33.
You may decide not to lift the hood when this warning
appears, but instead get service help right away.
SeeRoadside Assistance Program on page 8-7.
If you do decide to lift the hood, make sure the vehicle
is parked on a level surface.
Then check to see if the engine cooling fans are
running. If the engine is overheating, both fans should
be running. If they are not, do not continue to run
the engine and have the vehicle serviced.
Notice:Engine damage from running the engine
without coolant is not covered by the warranty.
Notice:If the engine catches re while driving
with no coolant, the vehicle can be badly damaged.
The costly repairs would not be covered by the
vehicle warranty. SeeOverheated Engine Protection
Operating Mode on page 6-37for information on
driving to a safe place in an emergency.
If Steam Is Coming From The Engine
Compartment
{WARNING:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it. Turn it off and get everyone away from the
vehicle until it cools down. Wait until there is no sign
of steam or coolant before you open the hood.
If you keep driving when the vehicles engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop the engine if
it overheats, and get out of the vehicle until the
engine is cool.
SeeOverheated Engine Protection Operating Mode
on page 6-37for information on driving to a safe
place in an emergency.
6-35

Notice:
When using concentrated washer uid, follow
the manufacturer’s instructions for adding
water.
Do not mix water with ready-to-use washer uid.
Water can cause the solution to freeze and
damage your washer uid tank and other parts
of the washer system. Also, water does not clean
as well as washer uid.
Fill the washer uid tank only three-quarters
full when it is very cold. This allows for uid
expansion if freezing occurs, which could
damage the tank if it is completely full.
Do not use engine coolant (antifreeze) in your
windshield washer. It can damage the vehicle’s
windshield washer system and paint.
Brakes
Brake Fluid
The brake master
cylinder reservoir is filled
with DOT 3 brake fluid.
SeeEngine Compartment
Overview on page 6-16for
the location of the reservoir.
There are only two reasons why the brake fluid level in
the reservoir might go down:
•The brake fluid level goes down because of normal
brake lining wear. When new linings are installed,
the fluid level goes back up.
•A fluid leak in the brake hydraulic system can also
cause a low fluid level. Have the brake hydraulic
system fixed, since a leak means that sooner
or later the brakes will not work well.
6-39