2005 PONTIAC BONNEVILLE heating

Heated Seats
If your vehicle has this
feature, the heated front
seat controls are located
on the instrument
panel under the climate
controls.
Press ON once for the HI setting or twice for the LO
setting. The lights above the button will come on
to indicate which setting has been activated. Press OFF
to turn the heated seat off.
The LO setting warms the seatback and cushion until
the seat approximates body temperature. The HI setting
heats the seatback and cushion to a slightly higher
temperature.
The heated seats can only be used when the ignition is
turned on. The heating elements in the seats
automatically turn off when the vehicle’s ignition is
turned off.
Reclining Seatbacks
If your vehicle has the manual recliner, lift the lever on
the outboard side of the seat and move the seatback
to the desired position. Release the lever to lock
the seatback. Pull up on the lever without pushing on
the seatback and the seatback will go to an upright
position.
Do not have the seatback reclined if your vehicle is
moving.
1-4

Trunk
{CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You cannot 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 and select the
control setting that will force outside air
into your vehicle. See Climate Control
System in the Index.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-34.
Trunk Lock Release
To unlock the trunk from the outside, insert the master
key into the trunk lock cylinder and turn it.
Remote Trunk Release
If your vehicle has this
feature, press the trunk
release button located in
the glove box to open
the trunk lid.
The key does not have to be in the ignition for the
remote trunk button to work. The transaxle must be in
PARK (P) or NEUTRAL (N). The system also works with
the remote keyless entry system, if equipped.
In order to secure items in the trunk, lock the glove box
with the master key and take your key and remote
keyless entry transmitter with you. The valet key,
if equipped, cannot open the trunk or the glovebox.
2-15

To open a rear ashtray, lift the cover.
Notice:If you put papers or other ammable items
in the ashtray, hot cigarettes or other smoking
materials could ignite them and possibly damage
your vehicle. Never put ammable items in the
ashtray.
The cigarette lighter is located next to the storage tray.
To use a lighter, just push the center in all the way
and let it go. When it is ready, the center will pop back
out by itself. Pull out the entire unit to use it.
Notice:Holding a cigarette lighter in while it is
heating will not allow the lighter to back away from
the heating element when it is hot. Damage from
overheating may occur to the lighter or heating
element, or a fuse could be blown. Do not hold a
cigarette lighter in while it is heating. Do not
use anything other than the cigarette lighter in the
heating element.Climate Controls
Climate Control System
With this system you can control the heating, cooling
and ventilation for your vehicle.
FAN:Turn the left knob clockwise or counterclockwise
to increase or decrease the fan speed. Push this
knob to turn the fan on and off. The fan must be on in
order for the air conditioning compressor to run.
TEMP (Temperature Control):Turn the right knob
clockwise or counterclockwise to manually increase or
decrease the temperature inside your vehicle.
3-25

Automatic Climate Control System
With this system you can control the heating, cooling
and ventilation for your vehicle.
Automatic Operation
AUTO (Automatic):Press the AUTO button for
automatic control of the inside temperature, the air
delivery mode and the fan speed.
1. Press the AUTO button. Whenever this button is
pressed, the display will show the current settings
for ve seconds before returning the display to
the exterior temperature.2. Adjust the temperature to 75° F (24° C).
Choosing the coldest or warmest temperature
setting will not cause the system to cool or heat any
faster. If you set the system at the coldest or
warmest temperature setting, the system will remain
at the maximum cold or hot setting and fan speed.
In cold weather, the system will start at reduced fan
speeds to avoid blowing cold air into your vehicle
until warmer air is available. The system will
start out blowing air at the oor but may change
modes automatically as the vehicle warms up
to maintain the chosen temperature setting. The
length of time needed for warm up will depend on
the outside temperature and the length of time
that has elapsed since your vehicle was last driven.
3. Wait for the system to regulate. This may take from
10 to 30 minutes. Then adjust the temperature, if
necessary.
Do not cover the solar sensor located in the center of
the instrument panel, near the windshield. For more
information on the solar sensor, see “Sensors” later in
this section.
3-28

Engine Coolant Temperature Gage
(V6 Engine)
This gage shows the engine coolant temperature.To prevent engine overheating, the air conditioning
compressor will turn off automatically just prior to the
gage pointer entering the shaded area. As the
engine cools down, the air conditioning compressor will
automatically turn back on. On vehicles equipped
with the Driver Information Center (DIC), the message
ENGINE HOT... A/C DISABLED will appear on the
DIC display and a warning chime will sound.
If the gage pointer moves into the shaded area, your
engine is too hot. On vehicles equipped with the
systems monitor, the CHECK GAGES light will come on
and a warning chime will sound. On vehicles with a
DIC, a CHECK GAGES TEMPERATURE message will
be displayed and a warning chime will sound. See
DIC Warnings and Messages on page 3-62for more
information.
SeeEngine Overheating (3.8L V6 Engine) on page 5-36
orEngine Overheating (4.6L V8 Engine) on page 5-38,
for information on what to do if your engine overheats. United States
Canada
3-45

Engine Coolant Temperature Gage
(V8 Engine)
This gage shows the engine coolant temperature.
To prevent engine overheating, the air conditioning
compressor will turn off automatically just prior to
the gage pointer entering the shaded area. As the
engine cools down, the air conditioning compressor will
automatically turn back on. On vehicles equipped
with the Driver Information Center (DIC), the message
ENGINE HOT... A/C DISABLED will appear on the
DIC display and a warning chime will sound.If the gage pointer moves into the shaded area, your
engine is too hot. On vehicles equipped with the
systems monitor, the CHECK GAGES light will come on
and a warning chime will sound. On vehicles with a
DIC, a CHECK GAGES TEMPERATURE message will
be displayed and a warning chime will sound. See
DIC Warnings and Messages on page 3-62for more
information.
On vehicles with a V8 engine, if the coolant temperature
is above normal operating range, the message
ENGINE HOT...IDLE ENGINE will appear. This means
that you should reduce the engine load and speed
to prevent the engine from overheating.
If an engine overheat condition exists, the message
ENGINE HOT...STOP ENGINE will appear. This means
that you should pull off the road, stop your vehicle,
and turn off the engine as soon as possible.
SeeEngine Overheating (3.8L V6 Engine) on page 5-36
orEngine Overheating (4.6L V8 Engine) on page 5-38,
for information on what to do if your engine overheats.
Your vehicle is equipped with an Overheated Engine
Protection Operating Mode, which alternates ring
groups of cylinders to help prevent engine damage. See
“Overheated Engine Protection Operating Mode”
underEngine Overheating (3.8L V6 Engine) on
page 5-36orEngine Overheating (4.6L V8 Engine) on
page 5-38for more information. United States
Canada
3-46

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.
Your vehicle has bulb warning lights. When you plug a
trailer lighting system into your vehicle’s lighting
system, its bulb warning lights may not let you know if
one of your lamps goes out. So, when you have a trailer
lighting system plugged in, be sure to check your
vehicle and trailer lamps from time to time to be sure
they are all working. Once you disconnect the trailer
lamps, the bulb warning lights again can tell you if one
of your vehicle lamps is out.
Driving On Grades
Reduce speed and shift to a lower gearbeforeyou 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.
On a long uphill grade, shift down to THIRD (3) and
reduce your speed to around 45 mph (70 km/h) to
reduce the possibility of the engine and transaxle
overheating.
Parking on Hills
{CAUTION:
You really should not park your vehicle, with a
trailer attached, on a hill. If something goes
wrong, your rig could start to move. People
can be injured, and both your vehicle and the
trailer can be damaged.
But if you ever have to park your rig on a hill, here is
how to do it:
1. Apply your regular brakes, but do not shift into
PARK (P) yet.
2. Have someone place chocks under the trailer
wheels.
3. When the wheel chocks are in place, release the
regular brakes until the chocks absorb the load.
4. Reapply the regular brakes. Then apply your
parking brake, and then shift to PARK (P).
5. Release the regular brakes.
4-42

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. See the Maintenance Schedule for
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
(3.8L V6 Engine) on page 5-36orEngine Overheating
(4.6L V8 Engine) on page 5-38.
4-43