light PONTIAC GRAND PRIX 1999 Service Manual

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2-82
Head-Up Display (Option)
CAUTION:
If the HUD image is too bright, or too high in
your field of view, it may take you more time to
see things you need to see when it's dark outside.
Be sure to keep the HUD image dim and placed
low in your field of view.
If you have the Head-Up
Display (HUD), you can see
the speedometer reading (in
English or metric units) and
a brief display of the current
radio station or CD track,
displayed ªthroughº
the windshield.The HUD also shows these lights when they are lit on
the instrument panel:

Turn Signal Indicators

High
-Beam Indicator Symbol

Low Fuel Symbol
The HUD will display ªCHECK GAGEº when the
following items are lit on the instrument panel:

Oil Warning Symbol

Coolant Temperature Symbol

Charging System Symbol
When you sit straight in your seat, the HUD image will
appear straight ahead near the front bumper.

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2-86
Driver Information Center (DIC) (If Equipped)
The Driver Information Center (DIC) gives you important safety and maintenance facts. When you turn the ignition
on, all of the Driver Information Center lights light up for a few seconds. Then it goes to work.

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2-87 Functions
: If one of the doors is ajar, a light will appear
next to that door on the vehicle outline.
CHANGE OIL SOON: This light will appear when the
system predicts that the oil's remaining useful life is
almost up. The system predicts remaining oil life using
inputs from length of drives, coolant temperature,
engine rpm and vehicle speed. It alerts you to change
the oil on a schedule consistent with the vehicle's
driving conditions.
After changing the oil, the system must be reset. With
the ignition key in ON but the engine off, fully push and
release the accelerator pedal slowly three times within
five seconds. If the CHANGE OIL SOON light flashes,
the system is resetting. Turn the ignition key to OFF,
then start the vehicle. If the CHANGE OIL SOON light
comes back on, the Oil Life Monitor has not reset.
Repeat the procedure.LOW: This light will come on when the ignition is
on and the fluid container is low.
AJAR: This light alerts you that the trunk is not
fully closed.
LOW TRAC: This light will come on when the
Traction Control System is limiting wheel spin. See
ªTrac Systemº or ªLow Traction Lightº in the Index.
TRAC OFF: This light lets you know that the Traction
Control System has been disabled and will not limit
wheel spin. See ªEnhanced Traction System Warning
Lightº or ªLow Traction Lightº in the Index.
TRAC switch: If the vehicle has the Traction Control
System, you will have a disable switch on the far right
side of the Driver Information Center. The Traction
Control System is automatically activated when you turn
the ignition on. This switch will activate/deactivate the
Traction Control System. If you need to disable the
system, such as when you are stuck and are rocking the
vehicle back and forth, push this switch. See ªStuck: In
Sand, Mud, Ice or Snowº in the Index.

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2-88
Trip Computer (If Equipped)
3100 and 3800 Engines
When you start the engine, the trip computer will display a mode. A lighted oval will appear to the left of the mode
currently being used.

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2-89
3800 Supercharged Engine
When you start the engine, the trip computer will display a mode. A lighted oval will appear to the left of the mode
currently being used.

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2-90 Control Buttons
The trip computer has three buttons that control its
functions.
ENG/MET: Press this button to change the display from
English to metric units or metric to English.
RESET: Press this button for two seconds to reset the
mode displayed.
MODE: Press this button to change the mode
being displayed.
Functions
PERFORMANCE SHIFT: This light comes on when
you press the performance shift button (located on the
console shift) to indicate that the vehicle is in
performance shifting mode.
See ªPerformance Shiftingº in the Index.
FUEL USED: Shows the total amount of fuel used
since you last reset this mode. The amount can be
displayed in gallons or liters.AVG ECON: Shows the average fuel economy since
you last reset this mode.
OIL LIFE: Shows a percentage of the oil's remaining
useful life. The system predicts remaining oil life using
inputs from length of drives, coolant temperature,
engine rpm and vehicle speed. Each time you get an oil
change, be sure to reset this function so that it will give
you an accurate percentage. See ªHow to Reset the Oil
Life Monitorº in the Index.
RANGE: Shows how much farther you can travel with
the fuel you have before refueling. When the range
displays L
, for 40 to 50 miles (64.36 to 80.45 km), the
display will flash the word LOW continuously and the
vehicle will chime three times. The range is calculated
from the average econ value times the fuel remaining in
the tank.
LOW: This light will come on when the ignition is
on and the fluid container is low.

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2-91
DOOR AJAR: If one of the doors is left ajar, a light
will appear next to that door on the vehicle outline.
BOOST GAGE: If you have the 3800 supercharged
engine, this gage will show the amount of boost the
engine is receiving.
TRUNK AJAR: If the trunk is not fully closed or open,
a light will outline the trunk area on the vehicle outline.
LOW TRAC: This light will come on when the
Traction Control System is limiting wheel spin. See
ªTraction Control Systemº or ªLow Traction Lightº in
the Index.TRAC/TCS OFF: This light lets you know that the
Traction Control System has been disabled and will not
limit wheel spin. See ªTraction Control System Warning
Lightº or ªLow Traction Lightº in the Index.
TRAC/TCS SWITCH: If the vehicle has the Traction
Control System, you will have a disable switch on the
far right side of the Trip Computer. The Traction
Control System is automatically activated when you turn
the ignition on. This switch will activate/deactivate the
Traction Control System. If you need to disable the
system, such as when you are stuck and are rocking the
vehicle back and forth, push this switch. See ªStuck: In
Sand, Mud, Ice or Snowº in the Index.

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3-3
FLOOR: This setting sends most of the air
through the ducts near the floor. The remaining airflow
comes out of the defroster and side window vents.
DEFOG: This setting allows half of the air to go
to the floor ducts and half to the defroster and side
window vents.
DEFROST: This setting directs most of the air
through the defroster. Some of the air goes to the floor
ducts and the side window vent. The air conditioning
compressor will run automatically in this setting unless
the outside temperature is below 38
F (3.3
C).
Air Conditioning Compressor Button
Press the A/C button to operate the air conditioning
compressor. The indicator light above the button will
glow when the button is pressed. You don't have to
press the button to run the compressor in MAX or
DEFROST because it will already be running in
these modes.Air Conditioning
On very hot days, open the windows long enough to let
hot, inside air escape. This reduces the time for the
vehicle to cool down.
For quick cool
-down on very hot days, use MAX with
the temperature knob all the way in the blue area. If this
setting is used for long periods of time, the air in your
vehicle may become too dry.
For normal cooling on hot days, use UPPER with the
temperature knob in the blue area and the A/C button
pushed in. The system will bring in outside air and
cool it.
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 button pushed in. The system
will bring in outside air and direct it to your upper body,
while sending slightly warmed air to your lower body.
You may notice this temperature difference more at
some times than others.

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3-5 Automatic Control
For the most efficient operation, you should set the
system temperature and press AUTO. The system will
select the best fan speed and airflow settings to keep you
comfortable. The air conditioning compressor will run if
the outside temperature is above 38
F (3.3
C). You may
notice a delay of three to four minutes before the fan
comes on.
Driver's Temperature Knob
The left knob sets the temperature for the entire system
when the light on DUAL button isn't lit. If the light is
lit, the knob sets the temperature for the driver. Turn the
knob toward red (clockwise) to raise the desired cabin
temperature. Turn it toward blue (counterclockwise) to
lower the temperature. The display will show your
selection for a few seconds, then the outside temperature
will show or be displayed.
Passenger's Temperature Knob
The right knob sets the desired cabin temperature for the
passenger and will automatically force the system into a
dual zone operation, lighting the dual zone button light.
Turn the right knob toward red (clockwise) to raise the
temperature. Turn it toward blue (counterclockwise) to
lower the temperature.Dual Zone Button Light
The dual zone button light indicates whether the system
is in single zone or dual zone operation. When there is
no desire for dual zone operation, push the lit dual zone
button to return to single zone operation. The dual zone
button light will go off.
The system will operate to achieve your comfort set
point as quick as possible. If you set the temperature for
60
F (16
C) or 90
F (32
C), the fan will go to its
highest speed, unless you manually select a lower speed.
The system will maintain full cold or full hot operation
at these settings.
Cold Weather Example: When you start the vehicle in
cold weather, (below freezing) or after being parked
overnight. If your Driver Set Temperature is 73
F
(23
C) and you are in Full Automatic mode, the system
will automatically move the temperature doors to full
hot. The blower will start out at a low speed and the
blower speed will increase as the engine warms up. The
air will be delivered to the floor. As the interior of the
vehicle warms up to your desired comfort point, the
blower will decrease and the temperature door will
move to a cooler position to maintain your desired
comfort. As the cabin warms up or the sun load
increases the system could switch to air delivered to the
individual to the windshield and the floor (Defog mode).

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3-6
Hot Weather Example: When you start the vehicle in
hot weather, 80
F (27
C) or after being parked during
the day in full sun, if your Driver Set Temperature is
73
F (23
C) and you are in Full Automatic mode, the
system will automatically move the temperature doors to
full cold. The blower will be at low speed momentarily
and then go to the high speed. The air intake will be
recirculated for maximum cooling performance. As the
interior of the vehicle cools down to your desired
comfort point, the blower will decrease and the
temperature door will move to a warmer position to
maintain your desired comfort. As the cabin cools down
or the sun load decreases the system could switch to air
delivered to A/C vents and the floor (Bi
-level mode).
Manual Control
Fan Buttons
The fan buttons select the amount of air you want when
the system is not in AUTO. The display will show the
fan speed by illuminating a maximum of seven fan bars.Mode Button
The center panel has several settings to control the
direction of airflow when the system is not in AUTO.
The indicator light on the button will glow when the
button is pressed. To access the various modes available,
continue to press the MODE button until the desired
mode appears on the display.
If you prefer to manually control the heating, cooling
and ventilation in your vehicle, push UPPER, BI
-LEV,
LOWER, DEFOG or DEF. AUTO will go off the
display. Set the system to the temperature and fan speed
you want. The system will try to maintain the
temperature you set using the mode you select. The
following suggestions will help the system run more
efficiently in manual mode.
RECIRC: This setting recirculates much of the
air inside your vehicle and sends it through the
instrument panel outlets. The air conditioning
compressor will run automatically in this setting unless
the outside temperature is below 38
F (3.3
C).
UPPER: This setting brings in the outside air and
directs it through the instrument panel outlets.