2010 PONTIAC G3 cooling

The engine coolant surge tank is located in the rear of
the engine compartment on the driver side of the
vehicle. SeeEngine Compartment Overview
on
page 6‑14for more information on location.
{WARNING:
Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam and
scalding liquids to blow out and burn you badly.
Never turn the surge tank pressure cap —even a
little —when the engine and radiator are hot.
When the engine is cold, the coolant level should be
between the Maximum (A) and Minimum (B) marks on
the coolant surge tank. The level rises at engine
operation temperature and drops again when the engine
cools down.
The coolant should be between the Maximum (A) and
Minimum (B) marks, when the engine is cold. If it is not,
there could be a leak in the cooling system.
6-27

How to Add Coolant to the Coolant
Surge Tank
{WARNING:
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.
Notice: This vehicle has a specific coolant fill
procedure. Failure to follow this procedure could
cause the engine to overheat and be severely
damaged.
{WARNING:
An electric engine cooling fan under the hood can
start up even when the engine is not running and
can cause injury. Keep hands, clothing, and tools
away from any underhood electric fan.
{WARNING:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They are
under pressure, and if you turn the surge tank
pressure cap —even a little —they can come out
at high speed. Never turn the cap when the
cooling system, including the surge tank pressure
cap, is hot. Wait for the cooling system and surge
tank pressure cap to cool if you ever have to turn
the pressure cap.
If no coolant is visible in the surge tank, add coolant as
follows: 1. Remove the coolant surge tank pressure cap when the cooling system, including the coolant surge
tank pressure cap and upper radiator hose, is no
longer hot. Turn the pressure cap slowly
counterclockwise about two or two and one-half
turns.
If you hear a hiss, wait for that to stop. This will
allow any pressure still left to be vented out the
discharge hose.
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4. With the coolant surge tank pressure cap off, startthe 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 Maximum mark, add more of the proper
mixture to the coolant surge tank until the level
reaches the 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.
Engine Overheating
The vehicle has an indicator to warn of the engine
overheating.
There is a coolant temperature gage on the instrument
panel cluster. See Engine Coolant Temperature Gage
on page 4‑28.
You may decide not to lift the hood when this warning
appears, but instead get service help right away. See
Roadside Assistance Program on page 8‑6.
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 fan is running.
If the engine is overheating, the fan should be running.
If it is 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 fire because of being
driven with no coolant, your vehicle can be badly
damaged. The costly repairs would not be covered
by the vehicle warranty.
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. Just 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.
(Continued)
6-30

Wheel Alignment and Tire Balance
The tires and wheels on your vehicle were aligned and
balanced carefully at the factory to give you the longest
tire life and best overall performance. Adjustments to
wheel alignment and tire balancing will not be
necessary on a regular basis. However, if you notice
unusual tire wear or your vehicle pulling to one side or
the other, the alignment might need to be checked.
If you notice your vehicle vibrating when driving on a
smooth road, the tires and wheels might need to be
rebalanced. See your dealer/retailer for proper
diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly
rusted or corroded. If wheel nuts keep coming loose,
the wheel, wheel bolts, and wheel nuts should be
replaced. If the wheel leaks air, replace it (except some
aluminum wheels, which can sometimes be repaired).
See your dealer/retailer if any of these conditions exist.
Your dealer/retailer will know the kind of wheel
you need.
Each new wheel should have the same load-carrying
capacity, diameter, width, offset, and be mounted the
same way as the one it replaces.If you need to replace any of your wheels, wheel bolts,
wheel nuts, or Tire Pressure Monitor System (TPMS)
sensors, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts, wheel nuts, and TPMS sensors
for your vehicle.
{WARNING:
Using the wrong replacement wheels, wheel bolts,
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts, and wheel nuts for
replacement.
Notice: The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance, and tire or tire chain
clearance to the body and chassis.
See Changing a Flat Tire
on page 6‑70for more
information.
6-67

FusesUsage
FAN HI Cooling Fan HI Relay ABS‐1 EBCM
ABS‐2 EBCM Fuses
Usage
SJB BATT Instrument Panel Fuse Block ACC/IG1 IGN1 Relay IG2/ST IGN2 Relay, Starter Relay
6-90

FusesUsage
ACC/RAP Instrument Panel Fuse Block
P/WINDOW‐2 Power Window Switch
P/W
WINDOW‐1 Power Window Switch
FAN LOW Cooling Fan LOW Relay A/CON A/C Compressor Relay
PKLP LH Tail Lamp (LH), Side Marker (LH),
Turn Signal & Parking Lamp (LH),
License Lamp
PKLP RH Tail Lamp (RH), Side Marker (RH),
Turn Signal & Parking Lamp (RH),
License Lamp, I/P Fuse Block
ECU ECM, TCM
FRT FOG Front Fog Lamp Relay F/PUMP Fuel Pump Relay
HAZARD Hazard Switch, Hood Contact
Switch
HDLP HI LH Head Lamp (LH), IPC Fuses
Usage
HDLP HI RH Head Lamp (RH) IPC IPC
HDLP LO LH Head Lamp (LH), I/P Fuse Block
HDLP LO RH Head Lamp (RH) EMS‐1 ECM, Injector
DLIS Ignition Switch
EMS‐2 EVAP Canister Purge Solenoid,
Thermostat Heater, HO2S, MAF
Sensor
SPARE Not Used
Relays Usage
F/PUMP RELAY Fuel Pump
STARTER RELAY Starter
PARK LAMP RELAY Park Lamp
6-91

RelaysUsage
FRONT FOG RELAY Fog Lamp
HDLP HIGH RELAY Head Lamp High
HDLP LOW RELAY Head Lamp Low
FAN HIGH RELAY Cooling Fan High
FAN LOW RELAY Cooling Fan Low Relays
Usage
A/CON RELAY Air Conditioner ENGINE MAIN RELAY Main Power
ACC/RAP RELAY I/P Fuse Block
IGN‐2 RELAY Ignition
Misc. Usage
FUSE PULLER Fuse Puller
6-92

Capacities and Specifications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricantson page 7‑12for more information.
Application Capacities
English Metric
Air Conditioning Refrigerant R134a For the air conditioning system refrigerant charge
amount, see the refrigerant caution label located
under the hood. See your dealer/retailer for more
information.
Cooling System 6.7 qt6.3 L
Engine Oil with Filter 4.8 qt4.5 L
Fuel Tank 11.9 gal45.0 L
Transmission, Automatic 6.2 qt5.87 L
Transmission, Manual 1.9 qt1.8 L
Wheel Nut Torque 81 lb ft110Y
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this
manual. Recheck fluid level after filling.
6-93