1999 CHEVROLET CORVETTE heater

yellowblue
5-13
NOTICE:
When adding coolant, it is important that you use
only DEX
-COOL
(silicate-free) coolant.
If coolant other than DEX-COOL is added to the
system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the use
of coolant other than DEX
-COOL
is not
covered by your new vehicle warranty.
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.
How to Add Coolant to the Coolant
Surge Tank
If you haven't found a problem yet, but the coolant level
isn't at the FULL COLD mark on the coolant surge
tank, add a 50/50 mixture of clean, drinkable water and
DEX
-COOL
coolant at the coolant surge tank, but be
sure the cooling system, including the coolant surge tank
pressure cap, is cool before you do it. (See ªEngine
Coolantº in the Index for more information.)

yellowblue
5-15
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mixture will. 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 fire and you or others could be burned. Use
a 50/50 mixture of clean, drinkable water and
DEX
-COOL
coolant.
NOTICE:
In cold weather, water can freeze and crack the
engine, radiator, heater core and other parts. So
use the recommended coolant.
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.

yellowblue
6-23
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system. The thermostat stops the
flow of coolant through the radiator until the coolant
reaches a pre
-set temperature.
When you replace the thermostat, a GM thermostat
is recommended.
Engine Coolant
The cooling system in your vehicle is filled with
DEX
-COOL
engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occurs first, if you add only
DEX
-COOL
extended 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 ªEngine Overheatingº in
the Index.A 50/50 mixture of clean, drinkable water and
DEX
-COOL
coolant will:

Give freezing protection down to
-34F (-37C).

Give boiling protection up to 265F (129C).

Protect against rust and corrosion.

Help keep the proper engine temperature.

Let the warning lights and gages work as
they should.
NOTICE:
When adding coolant, it is important that you
use only DEX
-COOL (silicate-free) coolant.
If coolant other than DEX-COOL is added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the
engine coolant will require change sooner
-- at
30,000 miles (50 000 km) or 24 months,
whichever occurs first. Damage caused by the
use of coolant other than DEX
-COOL is not
covered by your new vehicle warranty.

yellowblue
6-24 What to Use
Use a mixture of one-half clean, drinkable water and
one
-half DEX-COOL
coolant which won't damage
aluminum parts. If you use this coolant mixture, you
don't need to add anything else.
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mixture will. 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 fire and you or others could be burned. Use
a 50/50 mixture of clean, drinkable water and
DEX
-COOL
coolant.
NOTICE:
If you use an improper coolant mixture, your
engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
warranty. Too much water in the mixture can
freeze and crack the engine, radiator, heater core
and other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
NOTICE:
If you use the proper coolant, you don't have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.

yellowblue
9-3
Security Shade 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soft-Touch Paint Surfaces 6-58 . . . . . . . . . . . . . . . . . . . . . .
Tires 6-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrips 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels 6-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield and Wiper Blades 6-59 . . . . . . . . . . . . . . . . . . .
Cleaning, Wiper Blades 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Your Convertible Top 6-61 . . . . . . . . . . . . . . . . . . . .
Climate Control, Automatic Electronic Dual 3-4 . . . . . . . . . . .
Clock, Setting the 3-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clutch, Hydraulic 6-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Comfort Controls 3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compact Disc
Adapter Kits 3
-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changer, Trunk-Mounted 3-23 . . . . . . . . . . . . . . . . . . . . . .
Player 3-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Competitive Driving 4-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Console, Center Storage 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . .
Control of a Vehicle 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convenience 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net, Cleaning 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convertible Top 2-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lowering 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Raising 2-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convex Outside Mirror 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 5-11, 5-13, 6-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Surge Tank 5-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Surge Tank Pressure Cap 6-22 . . . . . . . . . . . . . . . . . . . . . . .
Coolant Heater, Engine 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . Cooling System 5
-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corvette Assembly Plant vii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Lamps 2
-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Courtesy Transportation 8-8 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer Assistance
For Text Telephone Users 8
-4 . . . . . . . . . . . . . . . . . . . . . . .
Information 8-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offices 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer Satisfaction Procedure 8-2 . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps 2-51 . . . . . . . . . . . . . . . . . . . . . . . .
Dead Battery 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defects, Reporting Safety 8-10, 8-11 . . . . . . . . . . . . . . . . . . .
Defensive Driving 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defogger, Rear Window 3-11 . . . . . . . . . . . . . . . . . . . . . . . . .
Defogging 3-3, 3-7, 3-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrosting 3-3, 3-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIC Warnings and Messages 2-102 . . . . . . . . . . . . . . . . . . . . .
Dimensions, Vehicle 6-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Locks 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downshifting 2-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Information Center (DIC) 2-92 . . . . . . . . . . . . . . . . . . .
Driver Information Center (DIC) Controls and Displays 2-93
Fuel 2-93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gages 2-94 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 2-97 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trip 2-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Information Center (DIC) Messages
ABS Active 2
-102 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Act Hndling Warming Up 2-102, 4-10 . . . . . . . . . . . . . . . .
Active Handling 2-108 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Before Shift 2-112 . . . . . . . . . . . . . . . . . . . . . . . . . . .

yellowblue
9-5
Electrical Equipment, Adding 2-24, 3-28, 6-63 . . . . . . . . . .
Electrical System 6-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Dual Climate Control System 3-4 . . . . . . . . . . . . . .
EMT 6-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessory Belt 6-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Coolant 6-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner/Filter 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Coolant 6-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 5-13, 5-16, 6-23 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Heater 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Level Check 7-13 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Temperature Gage 2-82 . . . . . . . . . . . . . . . . . . . . .
Exhaust 2-16, 2-38, 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level Check 7-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Gage 2-85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overheated Engine Protection Operating Mode 5-8 . . . . . .
Overheating 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Curves 6-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running While Parked 2-39 . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 6-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your 2-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Air Cleaner/Filter 6-16 . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additives 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking 6-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kind to Use 6-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Level Check 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Life 2-97 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Life Monitor, How to Reset 6-15 . . . . . . . . . . . . . . . . . . . . .
Scheduled Maintenance 7-6 . . . . . . . . . . . . . . . . . . . . . . . . . Used 6
-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Change 6-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil Life Monitor 6-15, 7-5 . . . . . . . . . . . . . . . . . . . . .
Engine Oil Scheduled Maintenance 7-6 . . . . . . . . . . . . . . . . . .
English/Metric Button 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethanol 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust, Engine 2-16, 2-38, 4-30 . . . . . . . . . . . . . . . . . . . . . .
Exit and Entry Lighting 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . .
Express-Down Windows 2-41 . . . . . . . . . . . . . . . . . . . . . . . . .
Extended Mobility Tires 6-42 . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Lamps 2-44, 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabric Protection 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Control Buttons 3-2, 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . .
Feature, Theft-Deterrent 2-17 . . . . . . . . . . . . . . . . . . . . . . . . .
Fiberglass Springs 6-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fifth Gear, Manual Transmission 2-31 . . . . . . . . . . . . . . . . . . .
Filling
A Portable Fuel Container 6
-9 . . . . . . . . . . . . . . . . . . . . . . .
Your Tank 6-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Air Cleaner 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish
Care 6
-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage 6-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First Gear
Automatic Transmission 2
-29 . . . . . . . . . . . . . . . . . . . . . . .
Manual Transmission 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . .
Fixed Mast Antenna 3-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flashers, Hazard Warning 5-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Tire, What to Do 5-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floor Mats 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Capacities 6-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

yellowblue
9-7
Radiator and Heater Hose 7-18 . . . . . . . . . . . . . . . . . . . . . .
Steering 7-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension 7-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire 7-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel 7-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 2-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brightness Control 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cluster 2-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cupholder 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Windshield and Rear Window Antennas 3-32 . . . .
Interior Lamps 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jacking Your Vehicle 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key in the Ignition 2-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-14 . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels 4-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification 4-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-65 . . . . . . . . . . . . . . . . . . . . .
Tire-Loading Information 4-31 . . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-65 . . . . . . . . . . . . . . . . . . .
Lamps 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning Exterior Lamps/Lenses 6-60 . . . . . . . . . . . . . . . . .
Courtesy 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exit and Entry 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior 2-44, 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Sidemarkers 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Turn Signal 6-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Headlamp/High
-Beams 6-33 . . . . . . . . . . . . . . . . . . . . . . . .
Interior 2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Turn Signal and Taillamps 6-36 . . . . . . . . . . . . . . . . . .
Twilight Sentinel 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lap Belt Cinch Feature 1-14 . . . . . . . . . . . . . . . . . . . . . . . . . .
Latches, Seatback 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-36 . . . . . . .
Lifting Your Corvette 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
From the Front 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
From the Rear 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lighted Visor Vanity Mirrors 2-60 . . . . . . . . . . . . . . . . . . . . . .
Lighter 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
Air Bag Readiness 1
-21, 2-78 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-80, 4-7 . . . . . . . . . . . .
Brake System Warning 2-79 . . . . . . . . . . . . . . . . . . . . . . . . .
Check Engine 2-83 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check Gages 2-86 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Reminder 1-8, 2-78 . . . . . . . . . . . . . . . . . . . . . .
Security 2-86 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limited-Slip Rear Axle 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Your Vehicle 4-31 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinders 7-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Automatic Transmission Check 7-16 . . . . . . . . . . .
Key Lock Cylinders Service 7-14 . . . . . . . . . . . . . . . . . . . .
Power Door 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Wheel Lock Key 6-51 . . . . . . . . . . . . . . . . . . . . .
Loss of Control 4-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-14 . . . . . . . . . . . . . . . . . . . . . . . .