heating CHEVROLET CORVETTE 1999 5.G User Guide

yellowblue
3-5
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.

yellowblue
3-6
As the interior of the vehicle warms up to your comfort
set temperature, the fan speed will decrease and the
temperature output may become cooler. If the interior
temperature continues to warm up due to heating
from the sun or outside temperature increases, the
system may switch to other air delivery modes
(typically DEFOG or BI
-LEVEL).
A Typical Hot Weather Example:
The vehicle has been parked outside all day in hot
weather (above 70
F/ 21
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 cooling. The blower
will start at a low speed momentarily to push the hot air
to the floor of the vehicle and then go to a higher blower
speed with cold airflow out of the instrument panel
outlets. A small amount of airflow will continue through
the lower ducts to cool the floor area.The air intake may start in the recirculated mode for
maximum cooling performance. As the interior of the
vehicle cools down to your comfort set temperature, the
fan speed will decrease and the temperature output may
become warmer. The air intake may shift from
recirculation to fresh air mode. If the interior continues
to cool due to a decrease in the amount of heat the
vehicle is absorbing from the sun or a decrease in the
outside temperature, the system could switch to other air
delivery modes (typically BI
-LEVEL or DEFOG).
Manual Settings
With the Automatic Electronic Dual Climate Control
System, there are several manual settings you can use to
control the system and override the AUTO operation.
You can program the fan speed, air delivery mode, air
intake mode and control the air conditioning operation
using these settings. The system will still determine the
temperature output level based on the driver
-set
temperature and the passenger temperature offset.

yellowblue
3-11
The air conditioning removes moisture from the air, so
you may notice water dripping from under the vehicle
when it is idling or after it has been turned off.
This is normal.
Heating
The heater works best if you keep the windows closed.
Maximum heating will occur when airflow direction is
in the lower mode and the temperature control knob
(on a manual climate control system) is all the way in
the red area. These settings will be selected by the
Automatic Electronic Dual Climate Control System if
operating in AUTO when maximum heating is required.
The BI
-LEVEL setting is designed for use on sunny
days when the air is only moderately warm or cool.
On days like these, the sun may adequately warm your
upper body, but your lower body may not be warm
enough. The BI
-LEVEL setting will direct cooler
airflow to your upper body and warmer air to the
floor area.
If you have the optional engine coolant heater and use it
during cold weather 0
F (
-18
C) or lower, the heating
system will provide heat more quickly because the
coolant is already warmed. See ªEngine Coolant Heaterº
in the Index.
Defogging and Defrosting
To rapidly defrost the windshield, the FRONT defrost
mode (Automatic Electronic Dual Climate Control
System) or defrost mode (manual control system)
should be used and the fan speed should be adjusted to
the highest speed. With the manual control system, turn
the temperature control knob all the way to the red area.
To keep the windshield clear and provide heated air to
the floor area of the vehicle, use the DEFOG setting.
Your vehicle is equipped with side window defogger
vents located near the side rearview mirrors.
Rear Window Defogger
REAR: This button turns the rear defogger and the
optional heated outside mirrors on. The light on the
button will come on when operating. The system
automatically shuts off after approximately 10 minutes.
If further defogging is desired, press the button again
and it will operate for about five more minutes.
The rear window defogger operates only when the
engine is running.

5-
yellowblue
5-1
Section 5 Problems on the Road
Here you'll find what to do about some problems that can occur on the road.
5
-2 Hazard Warning Flashers
5
-3 Other Warning Devices
5
-3 Jump Starting
5
-8 Towing Your Vehicle5
-8 Engine Overheating
5
-11 Cooling System
5
-18 If a Tire Goes Flat
5
-18 If You're Stuck: In Sand, Mud, Ice or Snow

yellowblue
5-8
Towing Your Vehicle
CAUTION:
To help avoid serious personal injury to you
or others:

Never let passengers ride in a vehicle that is
being towed.

Never tow faster than safe or posted speeds.

Never tow with damaged parts not
fully secured.

Never get under your vehicle after it has
been lifted by the tow truck.

Always secure the vehicle on each side with
separate safety chains when towing it.

Use only the correct hooks.
NOTICE:
Use the proper towing equipment to avoid
damage to the bumper, fascia or fog lamp areas
of the vehicle.
With current trends in automotive styles and design, it is
essential that the correct towing equipment is used to
tow a vehicle. Your vehicle can be towed with wheel
-lift
or car
-carrier equipment.
Consult your dealer or a professional towing service if
you need to have your vehicle towed. See ªRoadside
Assistanceº in the Index.
Engine Overheating
You will find an engine coolant temperature gage on the
instrument cluster and a COOLANT OVER TEMP
message on the Driver Information Center (DIC).
Overheated Engine Protection
Operating Mode
Should an overheated engine condition exist and the
messages COOLANT OVER TEMP and REDUCED
ENGINE POWER are displayed, along with the Check
Engine light, an overheat protection mode which
alternates firing 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).

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
6-22 How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you'll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
To add lubricant when the level is low, use SAE 75W-90
Synthetic Gear Lubricant (GM Part No. 12378261) or
equivalent meeting GM Specification 9986115. To
completely refill after draining, add 4 ounces (118 ml)
of Limited
-Slip Differential Lubricant Additive
(GM Part No. 1052358) or equivalent. Then fill to
the bottom of the filler plug hole with the Synthetic
Gear Lubricant.
Surge Tank Pressure Cap
NOTICE:
The surge tank pressure cap is a 15 psi (105 kPa)
pressure
-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating.
When you replace the surge tank pressure cap, a GM cap
is recommended.

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
6-41
Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service, see
your Chevrolet Warranty booklet for details.
CAUTION:
Poorly maintained and improperly used tires
are dangerous.

Overloading your tires can cause
overheating as a result of too much friction.
You could have an air
-out and a serious
accident. See ªLoading Your Vehicleº in
the Index.
CAUTION: (Continued)
CAUTION: (Continued)

Underinflated tires pose the same danger as
overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.

Overinflated tires are more likely to be cut,
punctured or broken by a sudden
impact
-- such as when you hit a pothole.
Keep tires at the recommended pressure.

Worn, old tires can cause accidents. If your
tread is badly worn, or if your tires have
been damaged, replace them.

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .