2003 CHEVROLET CORVETTE coolant temperature

Press the GAGE button again to display the oil
temperature, such as:
·OIL TEMP 234ÉF or
·OIL TEMP 112ÉC
Press the GAGE button again to display the coolant
temperature, such as:
·COOLANT TEMP 123ÉF or
·COOLANT TEMP 51ÉC
Press the GAGE button again to display the automatic
transmission ¯uid temperature, such as:
·TRANS FLUID 123ÉF or
·TRANS FLUID 51ÉC
Press the GAGE button again to display the battery
voltage, such as:
·BATTERY VOLTS 13.5
Press the GAGE button again to display the tire
pressure for the front tires (except Z06), such as:
·FRONT L34 R33 PSI or
·FRONT L234 R228 kPaPress the GAGE button again to display the tire
pressure for the rear tires (except Z06), such as:
·REAR L34 R33 PSI or
·REAR L234 R228 kPa
Tire pressure is not available until the vehicle has
reached a speed of 15 mph (24 km/h) or more.
3 TRIP
The TRIP button allows you to scroll through the
functions listed below when you press it.
3-47

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 255ÉF (124ÉC), this
message is displayed. If you have been operating your
vehicle under normal driving conditions, you should
pull off 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
Engine Overheating on page 5-26.
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 320ÉF (160ÉC),
this message is displayed. You should check the engine
coolant temperature and engine oil level. If your
engine is too hot, see
Engine Overheating on page 5-26.Your vehicle may need service, so see your dealer. You
can monitor the oil temperature with the GAGES
button on the DIC.
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 ¯uid temperature rises above 270ÉF
(132ÉC) or rises rapidly, this message is displayed.
The transmission may shift gears or apply the torque
converter clutch to reduce the ¯uid temperature. Driving
aggressively or driving on long hills can cause the
transmission ¯uid 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 ¯uid temperature and allow it to cool to at
least 230ÉF (110ÉC). The transmission ¯uid temperature
can be monitored with the GAGES button on the
DIC. See
Automatic Transmission Fluid on page 5-20.
You should also check the engine coolant temperature.
If it is also hot, see
Engine Overheating on page 5-26.
If the HIGH TRANS TEMP message is displayed during
normal vehicle operation on ¯at roads, your vehicle
may need service. See your dealer for an inspection.
3-58

How to Check and Add Fluid
Fluid should be added if the ¯uid level is below the step
on the inside of the reservoir. There are additional
instructions on the reservoir cap. Put the rubber seal
and cap back on. See
Engine Compartment Overview
on page 5-12for more information on location.
Engine Coolant
The cooling system in your vehicle is ®lled with
DEX-COOLžengine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs ®rst, if you add
only DEX-COOL
žextended 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, see
Engine Overheating on
page 5-26.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
žcoolant will:
·Give freezing protection down to-34ÉF (-37ÉC).
·Give boiling protection up to 265ÉF (129ÉC).
·Protect against rust and corrosion.
·Help keep the proper engine temperature.
·Let the warning lights and gages work as they
should.
5-23

Adding Coolant
If you need more coolant, add the proper DEX-COOLž
coolant mixtureat the surge tank,but only when the
engine is cool.
{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. Don't spill coolant on a hot engine.
When replacing the pressure cap, make sure it is
hand-tight.
Coolant Surge Tank Pressure Cap
Notice:Your pressure cap is a pressure-type
cap and must be tightly installed to prevent coolant
loss and possible engine damage from overheating.
See ªCapacities and Speci®cationsº for more
information.
See
Engine Compartment Overview on page 5-12for
information on location.
Engine Overheating
You will ®nd an engine coolant temperature gage on the
instrument panel cluster and a COOLANT OVER
TEMP message on the Driver Information Center (DIC).
See
Engine Coolant Temperature Gage on page 3-38andDIC Warnings and Messages on page 3-53.
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
messages COOLANT OVER TEMP and REDUCED
ENGINE POWER are displayed, along with the Check
Engine light, an overheat protection mode which
alternates ®ring groups of cylinders helps prevent engine
damage. In this mode, you will notice a loss in power
and engine performance. This operating mode
allows your vehicle to be driven to a safe place in an
emergency; you may drive up to 50 miles (80 km).
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any
repair. The engine oil will be severely degraded.
Repair the cause of coolant loss, change the oil
and reset the oil life system. See ªEngine Oilº in
the Index.
5-26

Windshield Washer Fluid
What to Use
When you need windshield washer ¯uid, be sure to read
the manufacturer's instructions before use. If you will
be operating your vehicle in an area where the
temperature may fall below freezing, use a ¯uid that has
sufficient protection against freezing.
Adding Washer Fluid
Open the cap with the
washer symbol on it. See
Engine Compartment
Overview on page 5-12for
reservoir location. Add
washer ¯uid until the tank
is full.
Notice:
·When using concentrated washer ¯uid, follow
the manufacturer's instructions for adding
water.
·Don't mix water with ready-to-use washer ¯uid.
Water can cause the solution to freeze and
damage your washer ¯uid tank and other parts
of the washer system. Also, water doesn't
clean as well as washer ¯uid.
·Fill your washer ¯uid tank only three-quarters
full when it's very cold. This allows for
expansion if freezing occurs, which could
damage the tank if it is completely full.
·Don't use engine coolant (antifreeze) in your
windshield washer. It can damage your
washer system and paint.
5-36

Checking Things Under the Hood......................5-10
Checking Your Restraint Systems......................1-48
Check...........................................................3-38
Engine Light...............................................3-38
Gages Warning Light...................................3-42
Chemical Paint Spotting...................................5-81
Child Restraints..............................................1-26
Child Restraint Systems...............................1-26
Infants and Young Children...........................1-23
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-31
Older Children.............................................1-21
Securing a Child Restraint Designed for
the LATCH System...................................1-33
Securing a Child Restraint in the Passenger
Seat Position...........................................1-34
Top Strap Anchor Location............................1-31
Top Strap...................................................1-30
Cigarette Lighter.............................................3-21
Cleaning Aluminum Wheels..............................5-80
Cleaning Coated Moldings................................5-76
Cleaning Exterior Lamps/Lenses.......................5-78
Cleaning Fabric/Carpet....................................5-75
Cleaning Glass Surfaces..................................5-77
Cleaning Interior Plastic Components.................5-77
Cleaning Leather............................................5-76
Cleaning Removable Roof Panel.......................5-79
Cleaning the Convertible Top............................5-80
Cleaning the Security Shade and
Convenience Net.........................................5-77Cleaning the Top of the Instrument Panel...........5-76
Cleaning Tires................................................5-80
Cleaning Windshield and Wiper Blades..............5-79
Cleaning........................................................5-81
Fiberglass Springs.......................................5-81
Inside of Your Vehicle..................................5-75
Outside of Your Vehicle................................5-78
Titanium Exhaust System..............................5-81
Underbody Maintenance...............................5-81
Weatherstrips..............................................5-77
Climate Control System...................................3-22
Dual Automatic............................................3-22
Outlet Adjustment........................................3-28
Clutch, Hydraulic.............................................5-22
Compact Disc Messages..........................3-70, 3-75
Competitive Driving Mode................................4-11
Control of a Vehicle.......................................... 4-5
Convenience Net............................................2-42
Convertible Top..............................................2-49
Lowering the Convertible Top........................2-50
Raising the Convertible Top..........................2-53
Coolant.........................................................3-38
Engine Temperature Gage............................3-38
Heater, Engine............................................2-23
Surge Tank Pressure Cap.............................5-26
Cooling System..............................................5-29
Courtesy Lamps.............................................3-16
Cruise Control.................................................. 3-9
Cupholder(s)..................................................2-39
Current and Past Model Order Forms................7-11
3

Electrical System (cont.)
Power Windows and Other Power Options......5-85
Windshield Wiper Fuses...............................5-85
Emergency Trunk Release Handle
(Convertible Only)........................................2-13
Emissions Inspection and Maintenance
Programs...................................................3-40
Engine Accessory Drive Belt Routing.................5-95
Engine Compartment Fuse Block......................5-89
Engine Coolant Level Check.............................. 6-8
Engine Oil Additives........................................5-16
Engine Oil Level Check..................................... 6-8
Engine Oil Scheduled Maintenance..................... 6-5
Engine..........................................................5-18
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-40
Check and Service Engine Soon Light............3-38
Compartment Overview................................5-12
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-38
Coolant......................................................5-23
Cooling System Inspection............................6-13
Exhaust.....................................................2-35
Oil Pressure Gage.......................................3-41
Oil .............................................................5-13
Overheating................................................5-26
Starting......................................................2-21
Exit/Entry Lighting...........................................3-16
Express-Down Window....................................2-15Extended Mobility Tires....................................5-54
Extender, Safety Belt.......................................1-20
Exterior Lamps...............................................3-12
F
Filter.............................................................5-18
Engine Air Cleaner......................................5-18
Finding a Station....................................3-63, 3-67
Finish Care....................................................5-78
Finish Damage...............................................5-81
Fixed Mast Antenna........................................3-79
Flash-to-Pass................................................... 3-7
Flat Tire........................................................5-68
Floor Mats.....................................................2-40
Fluid.............................................................5-20
Automatic Transmission................................5-20
Manual Transmission....................................5-20
Power Steering...........................................5-35
Windshield Washer......................................5-36
FM ...............................................................3-77
Fog Lamps....................................................3-14
Footnotes........................................................ 6-5
Front Air Dam................................................2-19
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-7
5

Fuel (cont.)
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-42
Gasoline Octane........................................... 5-4
Gasoline Speci®cations.................................. 5-5
System Inspection.......................................6-13
Fuses...........................................................5-86
Fuses and Circuit Breakers...........................5-86
Windshield Wiper.........................................5-85
G
Gage............................................................3-42
Check Gages Warning Light..........................3-42
Engine Coolant Temperature.........................3-38
Engine Oil Pressure.....................................3-41
Fuel..........................................................3-42
Speedometer..............................................3-31
Tachometer.................................................3-31
Voltmeter Gage...........................................3-34
Gasoline......................................................... 5-4
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Glove Box.....................................................2-39
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hatch/Trunk Lid Release..................................2-12
Hatch/Trunk...................................................2-11
Hazard Warning Flashers................................... 3-4
Headlamp High/Low-Beam Changer.................... 3-7
Headlamp Wiring............................................5-85
Headlamps Doors...........................................3-12
Headlamps on Reminder................................... 3-7
Headlamps....................................................5-47
Bulb Replacement.......................................5-47
Halogen Bulbs............................................5-47
Head-Up Display (HUD)...................................3-17
Highway Hypnosis...........................................4-25
Hill and Mountain Roads..................................4-25
Hood............................................................5-10
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-5
How to Add Coolant to the Coolant
Surge Tank.................................................5-31
How to Add Fluid............................................5-22
How to Check and Add Fluid............................5-23
How to Check Lubricant...................................5-46
How to Check Power Steering Fluid..................5-35
How to Check................................5-20, 5-21, 5-56
How to Remove and Replace the
Floor Mats..................................................2-40
How to Use This Manual...................................... ii
6