1999 PONTIAC GRAND AM cooling

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2-11 Resynchronization
Your keyless entry system is equipped with a security
system that prevents anyone from recording and playing
back your signal. The transmitter does not send the same
signal twice to the receiver. The receiver will not respond
to a signal that has been sent to it more that once.
To resynchronize your transmitter and receiver, follow
these directions:
1. Stand close to your vehicle.
2. Press and hold the LOCK and UNLOCK buttons
on the transmitter at the same time.
3. Hold the buttons for five seconds. In this time, the
doors should lock and unlock once. This confirms
the resynchronization. If the doors do not lock and
unlock, see your dealer for service.
Trunk
To unlock the trunk from the outside, insert the key and
turn the trunk lock cylinder or use the remote keyless
entry transmitter (if equipped).
CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You can't see or smell
CO. It can cause unconsciousness and even death.
If you must drive with the trunk lid open or if
electrical wiring or other cable connections must
pass through the seal between the body and the
trunk lid:

Make sure all other windows are shut.

Turn the fan on your heating or cooling
system to its highest speed with the setting
on VENT. That will force outside air into
your vehicle. See ªComfort Controlsº in
the Index.

If you have air outlets on or under the
instrument panel, open them all the way.
See ªEngine Exhaustº in the Index.

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3-2
Comfort Controls
With this system, you can control the ventilation and
heating in your vehicle.
Your vehicle also has the flow
-through ventilation
system described later in this section.
Climate Control System with
Air Conditioning
Fan Knob
The left control knob sets the fan speed. To select the
force of air you want, turn the knob. The fan is always
running unless the fan knob is moved to OFF.Temperature Knob
The center control knob regulates the temperature of the
air coming through the system.
Mode Knob
The right control knob changes the functions of
your system.
MAX: Use for maximum cooling. This setting
recirculates much of the air inside your vehicle. It
maximizes your air conditioner's performance and your
vehicle's fuel economy. The air conditioning compressor
will run automatically in this position when it is needed
to help dry the air in the vehicle.
VENT: In this position most of the airflow comes
through the instrument panel outlets. A small amount of
air comes through the floor vents. Set the center control
knob to the temperature desired.
BI-LEVEL: In this position the airflow comes
through the instrument panel outlets and through the
floor outlets. Set the center control knob to the
temperature desired.

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3-3
FLOOR: In this position most of the airflow
comes through the floor outlet. The rest of the air comes
through the windshield and side window vents. Set the
center control knob to the temperature desired.
DEFOG: This position divides the airflow
between the floor outlets and the windshield defroster
vent. The air conditioning compressor will run
automatically in this position when it is needed to help
dry the air in the vehicle.
FRONT DEFROSTER: This position directs
most of the airflow through the window defroster vent.
Some of the air goes to the floor outlets. The air
conditioning compressor will run automatically in this
position when it is needed to help dry the air in
the vehicle.Air Conditioning Compressor Button
Press A/C to operate the air conditioner compressor.
The indicator light will glow when the button is pressed
to indicate that the air conditioning system has been
turned on. The fan knob must be set to a speed.
Air Conditioning
The air conditioner and heater work best if you keep
your windows closed while using them. Your vehicle
also has the flow
-through ventilation system described
later in this section.
On very hot days, open the windows long enough to let hot
inside air escape. This reduces the time it takes for your
vehicle to cool down, which should help fuel economy.
On cool, but sunny days, the sun may warm your upper
body, but your lower body may not be warm enough.
You can use BI
-LEVEL with the temperature knob in
the middle and the A/C indicator light glowing. The
system will bring in outside air and direct slightly
warmer air to your lower body.
For normal cooling on hot days, use VENT with the
temperature knob in the blue area and the A/C indicator
light glowing. The system will bring in outside air and
cool it.

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3-6 Ventilation System
For mild outside temperatures when little heating or
cooling is needed, use VENT to direct outside air
through your vehicle. Your vehicle also has the
flow
-through ventilation system.
Your vehicle's flow
-through ventilation system supplies
outside air into the vehicle when it is moving. Outside
air will also enter the vehicle when the air conditioning
fan is running.Ventilation Tips

Keep the hood and front air inlet free of ice, snow or
any other obstruction, such as leaves. The heater and
defroster will work far better, reducing the chance of
fogging the inside of your windows.

When you enter a vehicle in cold weather, adjust the
mode knob to FLOOR and the fan to the highest
speed for a few moments before driving off. This
helps clear the intake ducts of snow and moisture
and reduces the chance of fogging the inside of
your windows.

Keep the air path under the front seats clear of
objects. This helps air circulate throughout
your vehicle.

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4-24
If you drive regularly in steep country, or if you're
planning to visit there, here are some tips that can make
your trips safer and more enjoyable.

Keep your vehicle in good shape. Check all fluid
levels and also the brakes, tires, cooling system
and transaxle. These parts can work hard on
mountain roads.

Know how to go down hills. The most important
thing to know is this: let your engine do some of the
slowing down. Shift to a lower gear when you go
down a steep or long hill.
CAUTION:
If you don't shift down, your brakes could get
so hot that they wouldn't work well. You would
then have poor braking or even none going
down a hill. You could crash. Shift down to let
your engine assist your brakes on a steep
downhill slope.
CAUTION:
Coasting downhill in NEUTRAL (N) or with
the ignition off is dangerous. Your brakes will
have to do all the work of slowing down. They
could get so hot that they wouldn't work well.
You would then have poor braking or even none
going down a hill. You could crash. Always have
your engine running and your vehicle in gear
when you go downhill.

Know how to go uphill. Drive in the highest
gear possible.

Stay in your own lane when driving on two
-lane
roads in hills or mountains. Don't swing wide or cut
across the center of the road. Drive at speeds that let
you stay in your own lane.

As you go over the top of a hill, be alert. There could be
something in your lane, like a stalled car or an accident.

You may see highway signs on mountains that warn
of special problems. Examples are long grades,
passing or no
-passing zones, a falling rocks area or
winding roads. Be alert to these and take
appropriate action.

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4-40 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; and

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're
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transaxle fluid (don't overfill),
engine oil, drive belt, cooling system and brake
adjustment. Each of these is covered in this manual, and
the Index will help you find them quickly. If you're
trailering, it's 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. See ªEngine Overheatingº
in the Index.
Towing A Trailer
(Except 3400 V6 Engine)
If your vehicle is equipped with the 2.4L L4 engine, it is
neither designed nor intended to tow a trailer.

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5-11
When you decide it's safe to lift the hood, here's what
you'll see:
A. Coolant Surge Tank with Pressure Cap
B. Electric Engine Cooling Fan
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,
don't do anything else until it cools down.

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5-12
The coolant level should be at or above FULL COLD.
If it isn't, you may have a leak in the radiator hoses,
heater hoses, radiator, water pump or somewhere else in
the cooling system.
CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Don't touch them. If you
do, you can be burned.
CAUTION: (Continued)
CAUTION: (Continued)
Don't run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
NOTICE:
Engine damage from running your engine
without coolant isn't covered by your warranty.
NOTICE:
When adding coolant, it is important that you use
only DEX
-COOL
(silicate-free) coolant.
If coolant other than DEX
-COOL is added to the
system, premature engine, heater core or
NOTICE: (Continued)