engine CHEVROLET CORVETTE 1999 5.G Service Manual

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Average Speed
Press the TRIP button until the average speed is
displayed, such as:

AVERAGE SPEED 62 MPH or

AVERAGE SPEED 100 km/h
Press reset in this mode to start calculating the average
speed. Press and hold RESET to clear.
Engine Oil Life
Press the TRIP button until the engine oil life is
displayed, such as OIL LIFE REMAIN 89%.
This is an estimate of the engine oil's remaining useful
life. It will show 99% when the system is reset after an
oil change. It will alert you to change your oil on a
schedule consistent with your driving conditions.
When the remaining oil life is low, the system will alert
you with the message CHANGE OIL SOON.
When the oil life is down to zero, you will receive the
message CHANGE OIL NOW.Remember, you must reset the OIL LIFE yourself after
each oil change. It will not reset itself. Also, be careful
not to reset the OIL LIFE accidentally at any time other
than when the oil has just been changed. It can't be reset
accurately until the next oil change.
To reset the Engine Oil Life Monitor, see ªHow to Reset
the Engine Oil Life Monitorº in the Index.
Also, see ªEngine Oil, When to Changeº and
ªMaintenance Scheduleº in the Index.
4 OPTIONS
This button allows you to choose personal options that
may be available on your vehicle, depending on the
options your vehicle is equipped with, such as security,
door locks, easy entry seats and language. Some of these
functions work along with the key fob transmitter.
When returning to the options menu, the first item of the
options list will always be displayed, not the one you
were last in when you changed buttons.

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TRAC/ACT HNDLG - OFF: By pressing the Active
Handling System console button briefly, the driver can
turn the Traction Control and Active Handling Systems
off. The message TRAC/ACT HNDLG
- OFF will be
displayed in the DIC, the instrument cluster light will be
on and a chime will sound. You can acknowledge this
message by pressing the RESET button. The anti
-lock
brake systems remains on with the Traction Control and
Active Handling Systems off. You should adjust your
driving accordingly.
COMPETITIVE DRIVING: When the Competitive
Driving mode is selected, this message will be displayed
in the DIC. The instrument cluster light will not be on
when the Competitive Driving mode is selected. The
Traction Control System will not be operating while in
the Competitive Driving mode. You should adjust your
driving accordingly.SERVICE ABS (Anti
-Lock Brake System): If the
SERVICE ABS message is displayed when you are
driving, stop as soon as possible and turn the ignition
off. Then start the engine again to reset the system. If
the message stays on, or comes back on again while you
are driving, your vehicle is in need of service. If the
regular brake system warning light isn't on, you still
have brakes, but don't have anti
-lock brakes. If the
regular brake system light is also on, you don't have
anti
-lock brakes and there is a problem with your
brakes. See ªBrake System Warning Lightº earlier in
this section.
If the SERVICE ABS message is being displayed, your
traction control system and the optional active handling
system will also be disabled. The driver information
center will scroll three messages: SERVICE ABS,
SERVICE TRACTION SYS and SERVICE ACTIVE
HNDLG, and the instrument cluster car icon will be
illuminated. The driver can acknowledge these messages
by pressing the reset button three times. When the
service message is displayed the computer controlled
systems will not assist the driver and you should have
the system repaired as soon as possible. Adjust your
driving accordingly.

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SERVICE COLUMN LOCK: If the system that
controls the locking and unlocking of the steering
column does not work properly, have the vehicle towed
to a dealer for service.
PULL KEY
- WAIT 10 SEC: If this message comes
on, the steering column lock system has detected a
problem while engaging the steering column lock. This
message may occur when the ignition key is removed
and re
-inserted before the steering column lock system
fully locks or unlocks the steering column. To
acknowledge that you have read this message, and to
clear it from the display, remove the ignition key and
wait 10 seconds before re
-inserting the key into the
ignition. If you attempt to operate your vehicle without
removing the key for 10 seconds, the vehicle's fuel
system will shut off at 1.5 mph (2.4 km/h). If the
message stays on after removing the key and waiting 10
seconds, have your vehicle taken to an authorized dealer
as soon as possible for diagnosis and repair.
LOW OIL PRESSURE: You will hear four chimes and
the CHECK GAGES telltale will come on when this
message is displayed. To acknowledge the warning,
press the RESET button. After you press the RESET
button, a message will be displayed and you will hear a
chime every minute until the vehicle is serviced. If you
do not press RESET, the message will remain on the
digital display until the vehicle is serviced.Low oil pressure may be the result of a combination of
low oil level and abrupt changes in the vehicle's
direction. When this warning is displayed, you should
not operate the engine at high RPM or make fast abrupt
moves. When it is convenient, you should check the oil
level. See ªEngine Oilº in the Index.
LOW OIL LEVEL: Press RESET to acknowledge that
you have read the message and to remove it from the
display. The message will reappear every 10 minutes
until this condition changes.
You will hear two chimes when this message is
displayed. If this message appears after starting your
engine, your engine oil level may be too low. You may
need to add oil. See ªEngine Overheatingº in the Index.
REDUCED ENGINE POWER: You will hear
chimes continuously when this message is displayed.
To acknowledge that you have read the message and
to remove it from the display, press RESET. The
message will reappear every 15 seconds until this
condition changes.

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If the Driver Information Center (DIC) displays the
REDUCED ENGINE POWER message and the
CHECK ENGINE light comes on, a noticeable
reduction in the vehicle's performance may occur. If the
REDUCED ENGINE POWER message is displayed but
there is no reduction in performance, proceed to your
destination. The performance may be reduced the next
time the vehicle is driven.
The vehicle may be driven at a reduced speed while the
REDUCED ENGINE POWER message is displayed,
but acceleration and speed may be reduced. Anytime the
CHECK ENGINE light stays on, the vehicle should be
taken to an authorized Chevrolet dealer as soon as
possible for diagnosis and repair.
Also, refer to ªMalfunction Indicator Lampº (Check
Engine Light) in the Index. If the REDUCED ENGINE
POWER message is displayed in combination with the
COOLANT OVER TEMP message, see ªEngine
Overheatingº in the Index.
SERVICE VEHICLE SOON: If this message appears
on the DIC, there may be an electrical or another system
problem with your vehicle. Have your vehicle checked
by your dealer if this message keeps appearing.CHARGE SYSTEM FAULT: Press RESET to
acknowledge that you have read the message and to
remove it from the display. The message will reappear
every 10 minutes until this condition changes. You will
hear two chimes when this message is displayed.
If this message comes on while you are driving, you
may have a problem with the electrical charging system.
It could indicate that you have a loose or broken drive
belt or another electrical problem. Have it checked
right away. Driving while this light is on could drain
your battery.
If you must drive a short distance with the message on,
be certain to turn off your accessories, such as the radio
and air conditioner.
TRACTION SYS ACTIVE: When your traction
control system is limiting wheel spin, the TRACTION
SYS ACTIVE message will be displayed. Slippery road
conditions may exist if this message is displayed, so
adjust your driving accordingly. The message will stay
on for a few seconds after the traction control system
stops limiting wheel spin.
TRACTION SYSTEM
-ON: This message is displayed
when you decide to turn on the Traction Control System
by pressing the switch on the console. This message will
shut off automatically on its own.

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MAXIMUM SPEED 80 MPH (129 km/h): You will
hear four chimes when this message is displayed. To
acknowledge the warning, press RESET. After you press
RESET, a message will reappear every 10 minutes until
this condition changes.
This message indicates that the vehicle speed will be
limited to 80 mph (129 km/h) when the shock absorber
system has failed and the shocks are in their full soft
mode. Have your vehicle serviced as soon as possible.
LOW COOLANT: You will hear two chimes when this
message is displayed. To acknowledge the warning,
press RESET. After you press RESET, a message will
reappear and you will hear a chime every 10 minutes
until this condition changes.
This message indicates that the coolant in the system is
low. You may need to add coolant. See ªEngine
Overheatingº in the Index.
COOLANT OVER TEMP: You will hear four chimes
and the CHECK GAGES telltale will come on when this
message is displayed. To acknowledge the warning,
press the RESET button. After you press the RESET
button, a message will be displayed and you will hear a
chime every minute until this condition changes. If you
do not press RESET, the message will remain on the
digital display until the condition changes.If the engine coolant exceeds 255
F (124
C), this
message is displayed. If you have been operating your
vehicle under normal driving conditions, you should
pull off from the road, stop your vehicle and turn off the
engine as soon as possible. You can monitor the coolant
temperature with the GAGES button on the DIC or the
engine coolant gage on the instrument panel cluster. See
ªEngine Overheatingº in the Index.
HIGH OIL TEMPERATURE REDUCE ENGINE
RPM: You will hear four chimes when this message is
displayed. To acknowledge the warning, press the
RESET button. After you press the RESET button, a
message will be displayed and you will hear a chime
every minute until this condition changes. If you do not
press RESET, the message will remain on the digital
display until the condition changes.
If the engine oil temperature exceeds 320
F (160
C),
this message is displayed. You should check the engine
coolant temperature and engine oil level. If your engine
is too hot, see ªEngine Overheatingº in the Index. Your
vehicle may need service, so see your dealer. You can
monitor the oil temperature with the GAGES button on
the DIC.

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HIGH TRANS TEMP (Automatic Transmission
Only): You will hear four chimes when this message
is displayed. To acknowledge this warning, press the
RESET button. After you press the RESET button,
the message will be displayed every 10 minutes until the
condition changes. If you do not press RESET,
the message remains on the display until the
condition changes.
If the transmission fluid temperature rises above
270
F (132
C) or rises rapidly, this message is
displayed. The transmission may shift gears or apply the
torque converter clutch to reduce the fluid temperature.
Driving aggressively or driving on long hills can cause
the transmission fluid temperature to be higher than
normal. If this message appears, you may continue to
drive at a slower speed. You should also monitor the
transmission fluid temperature and allow it to cool to at
least 230
F (110
C). The transmission fluid temperature
can be monitored with the GAGES button on the DIC.
See ªAutomatic Transmission Fluidº in the Index.
You should also check the engine coolant temperature.
If it is also hot, see ªEngine Overheatingº in the Index.If the HIGH TRANS TEMP message is displayed
during normal vehicle operation on flat roads,
your vehicle may need service. See your dealer for
an inspection.
SERVICE ACTIVE HANDLING: If the SERVICE
ACTIVE HNDLG message is displayed, there is a
problem with your Active Handling System and your
vehicle needs service. The instrument cluster light will
also be on and a chime will sound. When this message is
displayed, the system is not working. Adjust your
driving accordingly.
ACTIVE HANDLING: Your vehicle is equipped with
an optional computer controlled system to assist the
driver in controlling the vehicle in difficult driving
conditions. You may feel or hear the system working
and see the ACTIVE HANDLING message displayed in
the DIC. This is normal when the system is operating.

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Other Messages
Here are more messages that you can receive on your
Driver Information Center (DIC). To acknowledge a
message and read another message that may have come
on at the same time, press the RESET button.

BRAKE BEFORE SHIFT (Automatic
Transmissions Only)

CHANGE OIL NOW (See ªEngine Oil Lifeº in
the Index.)

CHANGE OIL SOON (See ªEngine Oil Lifeº in
the Index.)

CRUISE DISENGAGED (See ªCruise Controlº in
the Index.)

CRUISE SET __ MPH (__ km/h) (See ªCruise
Controlº in the Index.)

DOOR AJAR
ENGINE PROTECTION REDUCE ENGINE RPM

TRUNK AJAR (Convertible/Hardtop)

HATCH AJAR (Coupe)

HIGH VOLTAGE

LOW BRAKE FLUID (See ªBrake Fluidº in
the Index.)

LOW FUEL (See ªFuel Gageº in the Index.)

LOW VOLTAGE

LOW WASHER FLUID

RESERVE FUEL

UPSHIFT NOW

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LOWER: This setting directs most of the air
through the lower ducts to the floor area of the vehicle
with some of the air also directed toward the windshield
and side window vents.
DEFOG: This setting divides the air between the
windshield and lower outlets with a small amount
directed toward the side window vents. This is useful
when fog appears on the windshield or side glass due to
rain or snowy conditions.
DEFROST: Use this setting to quickly remove fog
or frost from the windshield. This setting directs most of
the airflow to the windshield with a small amount
directed toward the lower and side window outlets.
Mode Buttons
These buttons control the air intake, the air conditioning
and the rear window defogger operation.
FRESH AIR: Press this button and it will bring
outside air into the vehicle. The light on the button will
come on when operating. Use this setting while trying to
defrost or defog windows to help clear moisture.
RECIRCULATE: Press this button to limit the
amount of fresh air entering the vehicle by recirculating
most of the air inside the vehicle. The light on the button
will come on when operating. This setting is helpful
when you are trying to cool the air quickly or to limit
odors entering the vehicle. RECIRCULATE cannot be
used while in the DEFROST or DEFOG modes.
A/C: This button turns the air conditioning
compressor off or on under most conditions. The light
on the A/C button comes on when the compressor is
operating. The air conditioning does not operate at
temperatures below approximately 35
F to 40
F
(2
C to 4
C). The air conditioning cools and
dehumidifies the air coming into the vehicle. The air
conditioning cannot be turned off in DEFROST, as it
helps to remove moisture from the vehicle. It also helps
to keep the windows clear.
The air conditioning may be forced off at high engine
speeds or high engine oil or coolant temperatures.
See ªRear Window Defoggerº later in this section for
more information.

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When adjusting the temperature, start with a driver-set
temperature of 73
F (23
C) until you determine your
comfort zone. If you choose 60
F (16
C), the
system will remain at maximum cooling and will not
automatically adjust fan speed or air delivery. If you
choose 90
F (32
C), the system will remain at
maximum heating and will not automatically adjust fan
speed or air delivery. Choosing either maximum setting
will not cause the system to heat or cool any faster.
Turning the knob past either maximum setting has no
effect on the operation of the system.
Passenger Temperature Offset
The PASSENGER knob changes the temperature on the
passenger's side of the vehicle. When the knob is in the
12 o'clock position, the passenger's temperature is the
same as the driver's. Turn the knob clockwise for
warmer air on the passenger's side, counterclockwise for
cooler air. If the driver
-set temperature is set at 60
F
(16
C) or 90
F (32
C), turning the passenger knob
has no effect because the system is locked at a
maximum setting.Automatic Operation
Press the AUTO button to place the entire system in the
automatic mode. After a five
-second display of the
current settings, only the word AUTO and the outside
temperature will be shown on the digital display. The
system will operate to achieve your comfort set
temperature as quickly as possible. If you have set the
driver temperature at 60
F (16
C) or 90
F (32
C),
the system will not operate automatically until a
different temperature is selected. The AUTO control
system works best with the windows up and the
removable roof installed or the convertible top up.
A Typical Cold Weather Example:
Your vehicle has been parked outside overnight in cold
weather (below 32
F/ 0
C) and you have set the driver
temperature at 73
F (23
C) and have selected the
AUTO mode. The system will automatically adjust the
temperature output to maximum heating. The fan will
start at a low speed. This is to avoid blowing cold air
into the vehicle. The length of the delay depends on the
amount of time since the engine was last started, the
outside temperature and the engine coolant temperature.
As the coolant warms up, the fan speed will gradually
increase. Air will flow to the floor with some air to
the windshield to prevent fogging under most
normal conditions.

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A/C: This button turns the air conditioning
compressor on or off, except in the FRONT defrost
mode. The light on the A/C button will come on when
the compressor is operating in either the automatic or
manual mode. The air conditioning may also be forced
off at high engine speeds. The light on the A/C button
will flash if pressed when air conditioning operation is
not allowed.
FRESH AIR: Press this button to provide fresh
air from the outside. The light on this air intake button
will come on to show when it is operating. When in the
AUTO mode, the system automatically selects FRESH
AIR instead of recirculate, as required, to control the
temperature in the vehicle. By pressing FRESH AIR, the
system will lock into the fresh air mode. Any adjustment
to the air intake must then be made manually. FRESH
AIR should be used when trying to defrost or defog
windows to help reduce moisture inside the vehicle.
RECIRCULATE: Press this button to limit the
amount of fresh air entering the vehicle. The light on
this air intake button will come on to show when it is
operating. Recirculate is helpful when you are trying to
cool the air quickly or trying to limit odors and dust
from entering the vehicle. When in the AUTO mode, the
system automatically selects recirculate to cool the
vehicle's temperature. By pressing this button, the
system will lock into the recirculated air mode. Any
adjustment to the air intake must then be made
manually. The recirculated air mode is not allowed in
the front defrost or defog modes as fresh air helps
reduce moisture inside the vehicle.
FRONT: Press the FRONT defrost button to
quickly remove fog or frost from the windshield. This
setting directs most of the airflow to the windshield and
a small amount toward the lower and side window
outlets. The light on the button will come on and the
digital display will show the defrost mode symbol and
fan speed when the front defrost mode is being used.
Pressing FRONT defrost again will return the system to
the last operating mode.