heating CHEVROLET CORVETTE 1994 4.G User Guide

Downloaded from www.Manualslib.com manuals search engine Problems on the Road
F
Cooling System
When you decide it’s safe to lift the hood,
here’s what you’ll see on the
LT5 engine:
1. Coolant recovery tank
2. Coolant high fill reservoir with
3. Electric engine fans
pressure cap
. . -152
If
the coolant inside the coolant recovery
tank is boiling, don’t do anything else
until it cools down.
When it is cool, remove the coolant
recovery tank cap and look at the dipstick.
The coolant level should be at or above
“COLD.” If it isn’t, you may have a leak
in the radiator hoses, heater hoses,
radiator, water pump or somewhere else
in the cooling system.
I NOTICE:
I
Engine damage from running your
engine without coolant isn’t covered
by your warranty.
If there seems to be no leak, check
to see
if the electric engine fans are running.
If the engine is overheating, both fans
should be running.
If they aren’t, your
vehicle needs service.

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
Remove the nut on the outboard side
of the unit. Then loosen the front and
inboard nuts. For the LT5 engine, loosen
the two inboard nuts. Move the ECM unit
to either side.
Fluid should be added if the fluid level
is at or below the “ADD” mark on the
reservoir. There are additional instructions
on the reservoir cap.
When returning the ECM to its proper
position, make sure the bolts are aligned
with the slots in the bracket. Then gently
push down on the unit. When replacing
the unit, be careful not to over-tighten the
nuts -just tighten them until they are
snug.
. . * 188
Rear Axle
When to Check Lubricant
Refer to the Maintenance Schedule
to determine how often to check the
lubricant. See “Periodic Maintenance
Inspections” in the Index.
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
Axle Lubricant (GM Part
No. 12345977)
or
SAE 8OW-90 GL-5 gear lubricant.
To completely refill after draining,
add 4 ounces (1 18 ml) of Limited-Slip
Differential Lubricant Additive (GM Part
No. 1052358). Then fill to the bottom of
the filler plug hole with Axle Lubricant
(GM Part
No. 12345977) or SAE 8OW-90
GL-5 gear lubricant.
Engine Coolant
The following explains your cooling
system and how to add coolant when
it
is low. If you have a problem with
engine overheating or
if you need to add
coolant to your high fill reservoir, see
“Engine Overheating” in the Index.
The proper coolant for your Corvette will:
0
0
0
0
0
Give freezing protection down to -34°F (-37°C).
Give boiling protection up to 262°F
(128°C).
Protect against rust and corrosion.
Help keep the proper engine
temperature.
Let the warning lights work as they
should.

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
If you need to add more coolant, add the
proper mix at
the coolant recovery tank,
but only when your engine is cool. If the
tank is very low or empty, also add
coolant to the coolant high fill reservoir.
See “Engine Overheating”
in the Index
for information.
. . .190
Add coolant mix at the recovery tank, but
be careful not to spill it.
NOTICE:
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.
For complete drain, flush and refill
of
the engine, contact your Chevrolet
jealer or the procedure may be found in
3 Chevrolet Corvette Service Manual. To
purchase a service manual, see “Service
Publications” in the Index.
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 preset temperature.
When you replace your thermostat, an
AC@ thermostat is recommended.

Downloaded from www.Manualslib.com manuals search engine ABS ........................ 125
Acceleration Slip Regulation
System
..................... 126
Accessory Plug
.................. 76
Acrylic Roof Panel
............... 70
Adding Coolant
................ 189
Add-on Electrical Equipment
..... 21 8
Air Bag System ................. 23
How the System Works
......... 24
Servicing Your Air Bag-
Equipped Corvette
........... 26
Readiness Light
................ 24
Air Cleaner
.................... 182
Air Conditioner Controls
......... 106
Air Control Buttons
............. 106
Air Filter Replacement
........... 183
Alignment and Tire Balance. Wheel
. 208
Aluminum Wheels
.............. 2 15
AMPM Stereo
With Cassette Tape Player
...... 11 3
With Cassette Tape and
Compact Disc Player
........ 11 5
Antenna. Power Mast. Care
....... 11 8
Anti-Lock Brakes
.............. ‘125
System Active Light
............ 86
System Warning Light
.......... 85
To Use
..................... 126
Appearance Care
............... 21 0
Appearance Care and Materials .... 21 7
Appearance Care. Service and
..... 171 Ashtray and
Lighter
.............. 75
ASR System
................... 126
Active Light
.................. 87
Off Light .................... 86
Warning Light
................ 86
Audio Systems
................. 112
Audio Systems. Comfort Controls and
................. 105
Automatic Electronic Climate
Control
..................... 108
Air Control Buttons
........... 108
Automatic Control
............ 109
Defogging and Defrosting
Windows
................. 110
Fan
Control Buttons ........... 108
Manual Bi-Level
............. 109
Manual Cooling
.............. 109
-Manual Heating
.............. 109
Manual Ventilation
............ 109
System Problems
............. 110
Temperature Control Switch .... 108
Temperature Sensors
.......... 108
Automatic Transmission
.......... 5 1
Automatic Transmission Fluid
..... 184
Axle. Limited-Slip Rear
........... 56
Axle. Rear
.................... 188
Babies. Smaller Children
Balance. Wheel Alignment and
(Safety Belts)
.............. 28
and Tire
.................... 208 Battery
....................... 195
Battery Replacement. Passive Keyless
Entry System
................. 41
BBB Auto Line
. Alternative
Dispute Resolution Program.
GM Participation in
......... 253
Before Leaving on a Long Trip
.... 135
Belt. Lap-Shoulder
............... 20
Bi-Level
...................... 107
Blizzard. If You’re Caught in a
.... 138
Block Heater. Engine
............. 50
Brakes Adjustment
.................. 194
Anti-Lock (ABS)
............. 125
Fluid
....................... 193
Master Cylinder
.............. 193
Parking
...................... 56
PedalTravel
................. 194
System Parts. Replacing
........ 194
System Warning Light
.......... 84
Wear Indicators. Disc
.......... 194
Braking (Control of a Vehicle)
..... 124
Braking in Emergencies
.......... 127
“Break.In.
.. New Vehicle ......... 46
Brightness Control
............... 67
Bulb Replacement
.............. 195
Back-up Light
............... 198
Center High-Mounted Stoplight
.............. 200. 201
Cornering Light
.............. 199
Fog Lamp
................... 196
261 ...

Downloaded from www.Manualslib.com manuals search engine Coolant Adding
..................... 189
Engine
..................... 188
Heater. Engine
................ 50
How to Add to the Coolant
Recovery Tank
............. 153
How to Add to the Coolant
High Fill Reservoir
...... 154. 157
Temperature Gage. Engine
....... 89
Cooling
....................... 107
Cooling System
............ 151. 152
Corvette Action Center
.......... 253
Courtesy Lights
................. 68
Courtesy Transportation
.......... 255
Cruise Control
.................. 64
Passing Another Vehicle
While Using
................ 66
To Erase Speed Memory
........ 66
To Get Out of ................. 66
To Reduce Speed
While Using
................ 65
To Resume a Set Speed ......... 65
ToSet
....................... 64
Using on Hills
................ 66
Curves. Driving on
.............. 127
Customer Assistance
To Increase Speed While Using ... 65
for the Hearing or Speech Impaired (TDD)
............ 252
Customer Assistance Information
. . 251
Customer Satisfaction Procedure
... 252 Daytime
Running Lights
........ 68
Deep Standing Water.
Driving through
............... 50
Defects. Safety Reporting to General Motors
.... 254
Reporting to the Canadian
Government
............... 254
Reporting to the United States
Government
............... 254
Defensive Driving
.............. 122
Defogger. Rear Window
......... 11 1
Defogging and Defrosting Windows
................... 107
Delayed Accessory Bus
........... 47
Delco-Base@ AM/FM Stereo
with Cassette Tape and
Compact Disc Player
........ 115
Dimensions. Vehicle
............ 227
Dimmer (Brightness Control)
...... 67
Disc Break Wear Indicators
....... 194
Doing
Your Own Service
Work
....................... 172
Door Ajar Light
.................... 94
Locks
....................... 37
Locks. Power
................. 38
Storage Compartment
.......... 73
Downshifting
................... 55
Driver Information Center ......... 80
Driver Position (Safety Belts) ...... 19 Driving
AtNight
.................... 131
City
........................ 134
Defensive
................... 122
Drunken
.................... 122
Freeway
.................... 134
In the Rain
.................. 132
On Curves
.................. 127
On Snow or Ice
.............. 138
Through Deep Standing Water
.... 50
Winter ...................... 137
Drunken Driving
............... 122
ECM Engine Fuse Block
........ 222
Electrical Equipment. Add-on
..... 218
Emergencies. Braking in
......... 127
Emergencies. Steering in
......... 128
Engine
Cleaning
.................... 215
Coolant
..................... 188
Coolant (Block) Heater
......... 50
Coolant Temperature Gauge ..... 89
Exhaust
...................... 59
Identification
................ 218
Oil
........................ 178
Oil Life Monitor
............... 94
Oil Pressure Gauge
............. 91
Oil Temperature Gauge
......... 92
Overheating
................. 150
Power Switch
................. 49
263 . .

Downloaded from www.Manualslib.com manuals search engine Index
Engine Running
.................. 58. 59
Starting Your
................. 47
andthe
..................... 230
Extended Mobility Tires
......... 205
Extender. Safety Belt
............. 33
Fabric Protection
.............. 21 1
Fan Control Buttons
............. 106
Features and Controls ............ 35
Fiberglass Springs
.............. 2 16
Filling Your Tank
............... 174
Finish Care (Paint)
.............. 214
Finish Damage (Paint)
........... 2 15
Flashers. Hazard Warning
........ 142
Flat Tire. Changing a ............ 159
Flat Tire. Storing a
.......... 167. 168
Flat. If a Tire Goes
.............. 159
Fluid
Automatic Transmission
....... 184
Manual Transmission
.......... 186
Power Steering
............... 191
Recommended
............... 244
Windshield Washer
........... 192
Fog Lights
..................... 68
Foreign Countries. Fuels in
....... 174
Foreign Material Paint Damage
.... 21 5
Forward Lamp Fuse Block ........ 222
Freeway Driving
............... 134
... 264
Environment. Your Vehicle
Exhaust. Engine
................. 59 Front
Map Lights
................... 68
Seat. Manual
................. 12
Towing Hook-ups
............. 148
Fuel
......................... 173
Fuels in Foreign Countries
........ 174
Fuse Block FuelGage
...................... 83
ECM Engine
................. 222
Forward Lamp
............... 222
Instrument Panel
............. 220
Fuses and Circuit Breakers
..... 219
Gasolines for Cleaner Air
....... 173
Gauges Engine Coolant Temperature
..... 89
Engine Oil Pressure
............ 91
Engine Oil Temperature
......... 92
Fuel
........................ 83
Readings. Numeric
............. 83
Warning Lights and Indicators
.... 82
Glass ......................... 213
GM Participation in BBB Auto Line
-
Markings .................... 82
Alternative Dispute Resolution
Program
.................. 253
Halogen Bulbs
............... 195
Hardtop. Cleaning and Storage of
. . 215
Hardtop. Convertible
............ 100
Hatch Release. Remote ........... 41 Hazard Warning Flashers
......... 142
Headlights
..................... 67
Headlight Doors
................. 67
Headlight High/Low Beam
........ 62
Heater. Engine Coolant (Block)
..... 50
Heating ....................... 107
Highway Hypnosis
.............. 135
Hill and Mountain Roads ......... 136
Hood Release
.................. 175
Hood. Checking Things under the
. . 175
Hook.Ups. Front Towing
......... 148
Hook.Ups. Rear Towing
......... 149
Horn
.......................... 60
How to Add Coolant to the
Coolant Recovery Tank
........ 153
How To Add Coolant to the
Coolant High Fill Reservoir
............. 154. 157
Hydraulic Clutch
............... 187
Hydroplaning
.................. 133
Hypnosis. Highway
............. 135
Identification Number. Vehicle
.... 218
Idling. Rovgh
...... : ............ 50
If a Tire Goes Flat .............. 159
If You’re Stuck: In Sand. Mud. Ice or Snow
.................... 169
Ignition Switch
.................. 46
Inflation
- Tire Pressure .......... 206
Inside Daymight Rearview
Mirror
....................... 69

Downloaded from www.Manualslib.com manuals search engine Index
New Vehicle “Break-In” ........ 46
Night. Driving at
............... 131
Night Vision
................... 131
Noise Reduction
................ 113
Numeric Gauge Readings
......... 83
Odometer. Speedometer and
...... 80
Odometer. Trip .................. 81
Off-Road Recovery
............. 129
Off-Road Track Use
.............. 49
Oil Pressure Gauge. Engine
........ 91
Oil Temperature Gauge. Engine
..... 93
Oil. Engine
.................... 178
Operation of Lights
.............. 66
Overheating. Engine
............ 150
Owner Checks and Services
....... 238
P (Park). Shifting into ........... 57
P (Park). Shifting out of ........... 58
Paint
Chemical Spotting
............ 2 16
Finish Care
.................. 2 14
Finish Damage
............... 2 15
Foreign Material
.............. 2 1 5
One to Four Light ................ 55
Parking
AtNight
..................... 43
Brake
....................... 56
Brake Indicator Light
........... 85
Lots ........................ 43
I . . 266
Parking
Over Things That Bum
......... 59
Your Vehicle
.................. 58
PASS-Key ..................... 45
Passenger Position (Safety Belts)
... 27
Passenger Seat. Securing a Child Restraint in the
........... 30
Passing
....................... 129
Passive Keyless Entry Light
....... 95
Passive Keyless Entry System
...... 38
Pedal Travel. Brake
............. 194
Periodic Maintenance Inspections
. . 242
Plug. Accessory
................. 76
PKE .......................... 38
Power Antenna Mast Care
............ 118
Door Locks
................... 38
Remote Control Mirrors
......... 69
Seat
......................... 12
Steering
.................... 127
Steering Fluid
................ 19 1
Switch. Engine ................ 49
Windows
.................... 60
Pregnancy. Safety Belt Use during
....................... 27
Problems on the Road
........... 141
Publications. Service
............ 256
Questions Many People Ask about
Safety Belts
- and the Answers.
Here are
................... 18 Radio
Reception.
Radio. To Play the
Understanding
............... 117
AM/FM Stereo with Cassette AM/FM Stereo with Cassette Tape Player
................ 113
Tape and Compact Disc Player
................ 115
Rain. Driving
in the ............. 132
Rainy Weather Tips. Some
Other
...................... 133
Rear Axle
..................... 188
Rear Axle. Limited-Slip
........... 56
Rear Storage Compartment
........ 73
Rear Towing Hook-Ups
.......... 149
Rear Window Defogger
.......... 111
Rearview Mirror. Inside Daymight
.............. 69
Reclining Seatbacks. Manual
....... 13
Recommended Fluids and Lubricants
............... 244
Recovery. Off-Road
............. 129
Release Button. Key
.............. 47
Release. Hood
................. 175
Release. Remote Hatch
........... 41
Reminder Light. Safety Belt
....... 19
Reminder. Lights On
............. 67
Remote Control Mirrors. Power ..... 69
Remote Hatch Release
............ 41