2003 CHEVROLET CORVETTE engine overheat

The coolant level should be at or above the FULL
COLD mark. If it isn't, you may have a leak at the
pressure cap or 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.
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 ®re, and you could be
burned. Get any leak ®xed before you drive the
vehicle.
If there seems to be no leak, with the engine on, check
to see if the electric engine cooling fans are running.
If the engine is overheating, both fans should be
running. If they aren't, your vehicle needs service.
Notice:Engine damage from running your engine
without coolant isn't covered by your warranty.
See ªOverheated Engine Protection Operating
Modeº in the Index for information on driving to a
safe place in an emergency.
5-30

{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will.
CAUTION: (Continued)
CAUTION: (Continued)
Your vehicle's coolant warning system is set
for the proper coolant mixture. With plain
water or the wrong mixture, your engine could
get too hot but you wouldn't get the overheat
warning. Your engine could catch ®re and you
or others could be burned. Use a 50/50 mixture
of clean, drinkable water and DEX-COOL
ž
coolant.
Notice:In cold weather, water can freeze and crack
the engine, radiator, heater core and other parts.
Use the recommended coolant and the proper
coolant mixture.
{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.
5-32

{CAUTION:
It can be dangerous to get out of your vehicle
with the engine running, if the shift lever is not
in NEUTRAL (N) with the parking brake ®rmly
set (manual transmission). Your vehicle can
roll or move suddenly even when on fairly
level ground. To be sure your vehicle won't
move, always set your parking brake and move
the shift lever to NEUTRAL (N) when you start
or idle your engine.
{CAUTION:
Idling the engine in a closed-in place or with
the climate control system off can cause
deadly carbon monoxide (CO). See ªEngine
Exhaustº in the Index.
{CAUTION:
In¯ating something too much can make it
explode, and you or others could be injured.
Be sure to read the in¯ator instructions, and
in¯ate the tire to its recommended pressure.
Do not exceed 36 psi (248 kPa).
Notice:Do not allow the air compressor to operate
continuously for more than six minutes to help
prevent damage from overheating.
Notice:If 26 psi (179 kPa) tire pressure cannot be
reached after six minutes the vehicle should not
be driven further. Damage to the tire is severe and
the sealant will not be effective. Remove the air
compressor plug from the accessory power outlet
and unscrew the in¯ating hose from the tire
valve. See ªRoadside Assistanceº in the Index.
If 26 psi (179 kPa) tire pressure is reached in six
minutes or less, disconnect the air compressor and
attach the enclosed maximum speed label to the inside
upper left corner of the windshield or to the face of
the radio/clock.
5-72

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

Maintenance Schedule (cont.)
Tire and Wheel Inspection............................6-12
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Light................................3-38
Manual Seats................................................... 1-2
Manual Transmission Check............................... 6-9
Manual Transmission.......................................2-21
Fluid..........................................................5-20
Operation...................................................2-27
Matching Transmitter(s) to Your Vehicle............... 2-7
Memory.........................................................2-55
Message.......................................................3-53
DIC Warnings and Messages........................3-53
Mexico, Central America and Caribbean Islands/
Countries (Except Puerto Rico and U.S. Virgin
Islands) ± Customer Assistance....................... 7-5
Mirrors..........................................................2-37
Automatic Dimming Rearview........................2-37
Manual Rearview Mirror................................2-37
Outside Automatic Dimming Mirror.................2-38
Outside Convex Mirror.................................2-38
Outside Power Heated Mirrors.......................2-38
Model Reference................................................ vi
MyGMLink.com................................................ 7-3
N
New Vehicle Break-In......................................2-19
Normal Maintenance Replacement Parts............5-94
O
Odometer......................................................3-31
Off-Road Recovery..........................................4-15
Oil ................................................................3-41
Engine Oil Pressure Gage............................3-41
Engine.......................................................5-13
Older Children, Restraints................................1-21
One to Four Shift Light
(Manual Transmission)..................................2-29
Online Owner Center........................................ 7-3
Operating the Trunk-Mounted CD Changer
with the AM-FM Radio with Cassette..............3-73
Operating the Trunk-Mounted CD Changer with
the AM-FM Radio with CD............................3-74
Other Warning Devices...................................... 3-4
Outlet Adjustment............................................3-28
Outside.........................................................2-38
Automatic Dimming Mirror.............................2-38
Convex Mirror.............................................2-38
Power Heated Mirrors..................................2-38
Overheated Engine Protection
Operating Mode..........................................5-26
Overseas ± Customer Assistance........................ 7-5
Owners, Canadian............................................... ii
Owner's Information........................................7-11
9