heater CHEVROLET ASTRO CARGO VAN 2003 2.G User Guide

If there seems to be no leak, start the engine again.
The engine cooling fan speed should increase when idle
speed is doubled by pushing the accelerator pedal
down. If it doesn't, your vehicle needs service. Turn off
the engine.
Notice:Engine damage from running your engine
without coolant isn't covered by your warranty.
Notice:When adding coolant, it is important that
you use only DEX-COOLž(silicate-free) coolant.
If coolant other than DEX-COOLžis added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the engine
coolant will require change sooner Ð at 30,000 miles
(50 000 km) or 24 months, whichever occurs ®rst.
Damage caused by the use of coolant other
than DEX-COOL
žis not covered by your new vehicle
warranty.
How to Add Coolant to the Coolant
Recovery Tank
If you haven't found a problem yet, but the coolant level
isn't at the ADD mark, add a 50/50 mixture ofclean
drinkable water, and DEX-COOLžengine coolant at the
coolant recovery tank. SeeEngine Coolant on
page 5-28for more information.
{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. 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
žcoolant.
5-34

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.
When the coolant in the coolant recovery tank is at the
ADD mark, start your vehicle.
5-35

Relays Usage
A/C Relay
(Rear Heat and
A/C)Rear/Heat and Air Conditioning
Up®tter-ACCY
RelayUp®tter Accessory
Starter Enable
RelayStarter
A/C Enable
RelayAir Conditioning
Headlamps
RelayHeadlamps
Fuel Pump
RelayFuel Pump
Fuse/Circuit
BreakerUsage
UPFITTER-BATTUp®tter Battery Power Stud, Trailer
Wiring Harness
UPFITTER-ACCY Up®tter Accessory Relay
Spare Not used
Spare Not used
Spare Not usedFuse/Circuit
BreakerUsage
ECM-1BFuel Pump Relay and Motor, VCM,
Oil Pressure Switch/Sender
HORN Horn Relay and Horn
A/C COMPAir Conditioning Enable Relay and
Compressor
RR HTR/AC Rear Heater and Air Conditioning
ATC Active Transfer Case-L Van
FRT HVAC Front Heater and Air Conditioning
ENG-IOxygen Sensors, Camshaft Position
Sensor, Mass Air Flow Sensor,
Evaporative Emission Canister Vent
Solenoid
IGN-E Air Conditioning Enable Relay Coil
ECM-IFuel Injectors 1±6, Crankshaft
Position Sensot, VCM, Coil Driver
Module (EST), Ignition Coil
Blank Not Used
RH HDLMP Right Headlamp
LH Headlamp Left Headlamp
Blank Not Used
Blank Not Used
5-97

Capacities and Speci®cations
Please refer toPart D: Recommended Fluids and Lubricants on page 6-32for more information. See refrigerant
charge label under the hood for charge capacity information and requirements.
Engine Speci®cations
Engine RPO Transmission Spark Plug Gap Firing OrderWheel Nut
Torque
ªVortecº 4300 V6 MFI* LU3 M300.060 inches
(1.52 mm)1±6±5±4±3±2140 lb ft
190Y
*Micro Fuel InjectionTire Pressures ± See
Loading Your Vehicle on page 4-29.
Capacities and Speci®cations
ApplicationCapacities
English Metric
Cooling Capacities
Quantity without Rear Heater
Quantity with Rear Heater13.5 quarts
16.5 quarts12.8 L
15.6 L
Engine Oil with Filter 4.5 quarts 4.3 L
Fuel Tank 27.0 gallons 101.8 L
Transmission Fluid (Drain and Re®ll) 5.0 quarts 4.7 L
5-99

Checking Brake Fluid......................................5-43
Checking Coolant............................................5-29
Checking Engine Oil........................................5-15
Checking Things Under the Hood......................5-11
Checking Your Restraint Systems......................1-71
Check...........................................................3-30
Engine Light...............................................3-30
Gages Warning Light...................................3-36
Chemical Paint Spotting...................................5-89
Child Restraints..............................................1-44
Child Restraint Systems...............................1-44
Infants and Young Children...........................1-38
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-52
Older Children.............................................1-35
Securing a Child Restraint Designed for the
LATCH System........................................1-54
Securing a Child Restraint in a Center Seat
Position..................................................1-57
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-54
Securing a Child Restraint in the Right Front
Seat Position...........................................1-59
Top Strap Anchor Location............................1-50
Top Strap...................................................1-48
Where to Put the Restraint...........................1-47
Cigarette Lighter.............................................3-17
Cleaning Aluminum Wheels..............................5-88
Cleaning Exterior Lamps/Lenses.......................5-86Cleaning Fabric/Carpet....................................5-83
Cleaning Glass Surfaces..................................5-85
Cleaning Interior Plastic Components.................5-85
Cleaning Leather............................................5-85
Cleaning the Top of the Instrument Panel...........5-85
Cleaning the Windshield and Wiper Blades.........5-87
Cleaning Tires................................................5-88
Cleaning Vinyl................................................5-85
Cleaning........................................................5-83
Inside of Your Vehicle..................................5-83
Outside of Your Vehicle................................5-86
Underbody Maintenance...............................5-89
Weatherstrips..............................................5-86
Climate Control System...................................3-18
Rear Air Conditioning System........................3-20
Rear Heating System...................................3-19
Rear..........................................................3-21
Compact Disc Messages..................................3-45
Compact Spare Tire........................................5-82
Composite Headlamps.....................................5-56
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-45
Coolant.........................................................3-30
Engine Temperature Gage............................3-30
Heater, Engine............................................2-22
Cooling System..............................................5-33
Cruise Control................................................3-10
Current and Past Model Order Forms................7-12
3

Electrical System (cont.)
Power Windows and Other Power Options......5-92
Windshield Wiper Fuses...............................5-92
Emissions Inspection and Maintenance
Programs...................................................3-33
Engine Coolant Level Check.............................6-26
Engine Oil Additives........................................5-18
Engine Oil Level Check...................................6-26
Engine..........................................................5-24
Air Cleaner/Filter.........................................5-24
Battery.......................................................5-46
Check and Service Engine Soon Light............3-30
Compartment Overview................................5-14
Coolant Heater............................................2-22
Coolant Temperature Gage...........................3-30
Coolant......................................................5-28
Cooling System Inspection............................6-30
Cover........................................................5-20
Exhaust.....................................................2-30
Fan Noise..................................................5-39
Oil .............................................................5-15
Overheating................................................5-31
Starting......................................................2-21
Entry Lighting.................................................3-15
Erasing HomeLink
žButtons..............................2-37
Except Cargo Vans.................................1-38, 1-47
Exit Lighting...................................................3-15Express-Down Window....................................2-17
Extender, Safety Belt.......................................1-34
Exterior Lamps...............................................3-12
F
Filter.............................................................5-24
Engine Air Cleaner......................................5-24
Finding a Station....................................3-39, 3-41
Finish Care....................................................5-87
Finish Damage...............................................5-88
Fixed Mast Antenna........................................3-50
Flash-to-Pass................................................... 3-7
Flat Tire, Changing.........................................5-71
Flat Tire........................................................5-70
Fluid.............................................................5-25
Automatic Transmission................................5-25
Power Steering...........................................5-40
Windshield Washer......................................5-41
FM ...............................................................3-50
Following Distance..........................................4-38
Front Axle......................................................5-54
Front Doors..................................................... 2-8
Fuel Regulator................................................2-21
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
5

Tires.............................................................5-63
Buying New Tires........................................5-66
Chains.......................................................5-70
Changing a Flat Tire....................................5-71
Compact Spare Tire.....................................5-82
If a Tire Goes Flat.......................................5-70
In¯ation Ð Tire Pressure..............................5-64
Inspection and Rotation................................5-64
Uniform Tire Quality Grading.........................5-67
Wheel Alignment and Tire Balance.................5-69
Wheel Replacement.....................................5-69
When It Is Time for New Tires......................5-66
To Use the Engine Coolant Heater....................2-22
Top Strap Anchor Location...............................1-50
Top Strap......................................................1-48
Torque Lock...................................................2-29
Total Weight on Your Vehicle's Tires..................4-35
Tow/Haul Mode Button.....................................2-25
Tow/Haul Mode Light.......................................3-36
Towing..........................................................4-29
Recreational Vehicle.....................................4-29
Towing a Trailer..........................................4-31
Your Vehicle...............................................4-29
Trailer Brakes.................................................4-36
Trailer Wiring Harness.....................................4-41
Trailering Package..........................................4-31
Transfer Case................................................5-52Transmission Operation, Automatic....................2-23
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-11
Transmission..................................................5-25
Fluid, Automatic...........................................5-25
Transportation Options...................................... 7-9
Trip Odometer................................................3-25
Turn and Lane Change Signals.......................... 3-6
Turn Signal/Multifunction Lever........................... 3-6
Turn Signals When Towing a Trailer..................4-38
U
Underbody Flushing Service.............................6-29
Underhood Fuse Block....................................5-96
Understanding Radio Reception........................3-50
Uniform Tire Quality Grading............................5-67
United States ± Customer Assistance.................. 7-4
Unlocking the Theft-Deterrent Feature After a
Power Loss................................................3-49
Used Replacement Wheels..............................5-70
Using Cleaner on Fabric..................................5-84
Using HomeLink
ž...........................................2-37
14