2007 PONTIAC G5 heating

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 290.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.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core,
or radiator corrosion. In addition, the engine
coolant may require changing sooner, at
the rst maintenance service after each
30,000 miles (50 000 km) or 24 months,
whichever occurs rst. Any repairs would not
be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
vehicle.
287

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 290
for 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 278for 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 167for more information.
290

{CAUTION:
An electric engine cooling fan under the
hood can start up even when the engine
is not running and can injure you. Keep
hands, clothing, and tools away from any
underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
The coolant level should be at the COLD FILL line.
If it is not, you may have a leak at the pressure cap
or in the radiator hoses, heater hoses, radiator,
water pump, or somewhere in the cooling system.
{CAUTION:
Heater and radiator hoses, and other
engine parts, can be very hot. Do not
touch them. If you do, you can be burned.
CAUTION: (Continued)
CAUTION: (Continued)
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 your
engine without coolant is not covered by your
warranty.
Notice:Using coolant other than DEX-COOL
®
may 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 your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your
vehicle.
293

Tires
Your new vehicle comes with high-quality tires
made by a leading tire manufacturer. If you ever
have questions about your tire warranty and where
to obtain service, see your GM Warranty booklet
for details. For additional information refer to
the tire manufacturer’s booklet included with your
vehicle.
{CAUTION:
Poorly maintained and improperly used
tires are dangerous.
Overloading your vehicle’s tires can
cause overheating as a result of too
much friction. You could have an
air-out and a serious accident. See
Loading Your Vehicle on page 249.
CAUTION: (Continued)
CAUTION: (Continued)

Underinated tires pose the same
danger as overloaded tires. The
resulting accident could cause serious
injury. Check all tires frequently to
maintain the recommended pressure.
Tire pressure should be checked when
your vehicle’s tires are cold. See
Inflation - Tire Pressure on page 327.
Overinated tires are more likely to be
cut, punctured, or broken by a sudden
impact — such as when you hit a
pothole. Keep tires at the
recommended pressure.
Worn, old tires can cause accidents.
If the tire’s tread is badly worn, or if
your vehicle’s tires have been
damaged, replace them.
320

Fuses Usage
8 Ignition Switch, PASS-Key
®III+
9 Stoplamp
10Heating, Ventilation, Air
Conditioning, PASS-Key
®III+
11 Empty
12 Spare
13 Airbag
14 Spare
15 Windshield Wiper
16 Climate Control System, Ignition
17 Empty
18 Empty
19Electric Power Steering,
Steering Wheel Control
20 Sunroof
21 Spare
22 Empty
23 Audio System
24Sensing and Diagnostic
Module (Airbag)
Fuses Usage
25Engine Control Module,
Transaxle Control Module
26 Door Locks
27 Interior Lights
28 Steering Wheel Control Illumination
29 Power Windows
Relays Usage
30 Climate Control System
31 Empty
32 Retained Accessory Power (RAP)
Engine Compartment Fuse Block
The engine compartment fuse block is located on
the driver’s side of the vehicle. Lift off the cover
to check the fuses. SeeEngine Compartment
Overview on page 278for more information
on location.
365

Driving (cont.)
Hill and Mountain Roads.......................... 241
In Rain and on Wet Roads...................... 235
Rocking Your Vehicle to Get it Out.......... 248
Winter...................................................... 243
E
Easy Entry Seat............................................ 14
Electric Power Management........................ 149
Electrical System
Add-On Equipment................................... 362
Engine Compartment Fuse Block............. 365
Floor Console Fuse Block........................ 364
Fuses and Circuit Breakers...................... 363
Headlamp Wiring..................................... 363
Power Windows and Other
Power Options...................................... 363
Windshield Wiper Fuses........................... 363Engine
Air Cleaner/Filter...................................... 284
Battery..................................................... 303
Check and Service Engine Soon Light..... 168
Coolant.................................................... 287
Coolant Heater......................................... 112
Coolant Temperature Warning Light.......... 167
Drive Belt Routing.................................... 388
Engine Compartment Overview ................ 278
Exhaust................................................... 123
Oil ........................................................... 279
Oil Life System........................................ 282
Overheating............................................. 290
Starting.................................................... 110
Enhanced Traction System (ETS) ................ 226
Warning Light........................................... 166
Entry/Exit Lighting....................................... 149
Event Data Recorders (EDR)...................... 403
Extender, Safety Belt..................................... 38
417