1996 CHEVROLET ASTRO heater

NOTICE:
When adding coolant it is important that you use
DEX-COOL
TM (orange-colored, silicate-free)
coolant meeting
GM Specification 6277M.
If silicated coolant 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.
What to Use
Use a mixture
of one-half clean water (preferably
distilled) and one-half
DEX-COOL (orange-colored,
silicate-free) antifreeze that meets GM Specification
6277M, which won’t damage aluminum parts. Use GM
Engine Coolant Supplement (sealer)
(GM Part
No. 3634621) with any complete coolant change. If you
use this mixture, you don’t need to add anything else.
A CAUTION:
I
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 mix will. Your vehicle’s coolant warning
system is set for the proper coolant mix. With
plain water or the wrong mix, 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 mix of clean
water and DEX-COOL (orange-colored,
silicate-free) antifreeze.
6-26

NOTICE:
If you use an improper coolant mix, your engine
could overheat and be badly damaged. The repair
cost wouldn’t be covered by your warranty. Too
much water in the mix can freeze and crackthe
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.
I NOTICE: I
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.
Checking Coolant
When your engine is cold, the coolant level should be at
ADD, or a little higher. When your engine is warm, the
level should be up to
FULL HOT, or a little higher.
6-27

Fuse
UPFIT-BATT .......
UPFIT-IGN . .
Spare .....
Fuse Puller*
Spare
.............
Spare .............
ECM-B ............
..
..
HORN ......
A/C COMP ...
RR DEFOG .......
ENG-I ......
IGN-E
..
..
Usage
Upfitter Battery
Power Stud, Trailer Wiring
Harness Upfitter Ignition Relay
Not Used
Not Used Not Used
Fuel Pump Relay,
VCM, Oil Pressure
Switch/Sender
Horn Relay
A/C Enable Relay
Heater-A/C Control Selector Switch
Oxygen Sensors 1-4,
Camshaft Position Sensor,
Mass Air Flow Sensor,
Evaporative Emission
Canister Purge Solenoid
Valve, Linear EGR Valve
Solenoid, VCM
A/C Enable Relay
Fuse
ECM-I ..... .....
LIGHTING .....
BATT I/P .......
IGN A .............
IGN B .............
ABS ..............
AIC ...............
RR HTR/AC ........
Spare .............
Usage
Fuel Injectors 1-6,
Crankshaft Position Sensor,
VCM, Distributor Ignition
Control Module Park Lamps Fuse,
DRL Fuse, Headlamp and
Panel Dimmer Switch
Fuse Block Fuses,
Power Seat CB,
Stop/Hazard Fuse,
Auxiliary Power Fuse,
Cigarette Lighter Fuse,
Radio, Battery Fuse
Starter Relay, Ignition Switch
Ignition Switch
Brake Pressure Module Valve Blower Motor Resistor,
Blower Relay
Auxiliary Heater A/C Relay
Not Used
* A fuse puller is included in the underhood electrical
center. You
will also find spare fuses.
6-65

Capacities and Specifications
Engine Specifications
Engine ............... “VORTEC” 4300 V6 SFI‘k
RPO ................................... L35
Firing Order
...................... 1-6-5-4-3-2
Horsepower
................... 190 at 4,400 rpm
Thermostat Specification
......... 195 “F (9 1 O C)
“Sequential Fuel Injection
Wheel Nut Torque
Base or Optional Wheel ....... 100 lb-ft (140 Nem)
Tire Pressures ......... .... See “Loading
Your Vehicle” in
the Index.
Cooling System Capacity
Quantity*
Without Rear Heater
13.5 quarts (12.8 L)
Quantity*
with Rear Heater
16.5 quarts (15.5 L)
*All quantities are approximate. After refill, the level must
be checked.
Crankcase Capacity
Quantity*
with Filter
................... 4.5 quarts (4.3 L)
*All quantities are approximate. After refill, the level
must be checked. Do not overfill.
Fuel Tank Capacity
Standard Tank* ...........
*All quantities are approximate,
Transmission Capacity
Automatic Transmission
(Drain and Refill)“
.........
*All quantities are approximate.
Rear Axle Capacity
Standard Rear Axle* . .
Locking Rear Axle” ..........
*All quantities are approximate.
. . 27 gallons (102 L)
. . 5.0 quarts (4.7 L)
. . 3.5 pint (1.7 L)
3.5 pint (1.7 L)
6-67

Part C: Periodic Maintenance
Inspections
Listed below are inspections and services which should
be performed
at least twice a year (for instance, each
spring and fall). You should let your GM dealer’s
service department or other qualified service center do
these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures to perform these services may be
found
in a GM Service Manual. See “Service and Owner
Publications’’
in the Index.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections
or other conditions which could
cause a heat build-up
in the floor pan or could let
exhaust fumes into the vehicle. See “Engine Exhaust’’
in the Index.
Radiator and Heater Hose Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed.
Throttle Linkage Inspection
Inspect the throttle linkage for interference or binding,
and for damage or missing
parts. Replace parts as
needed. Replace any cables
that have high effort or
excessive wear.
Do not lubricate accelerator and cruise
control cables.
7-45

Brakes. Anti-Lock ............................... 4-6
Braking
........................................ 4-5
Braking
in Emergencies ........................... 4-8
Break-In. New Vehicle
.......................... 2- 13
BTSICheck ................................... 7-43
Bulb Replacement
.............................. 6-36
Canadian Roadside Assistance
.................... 8-6
Capacities and Specifications
...................... 6-67
Carbon Monoxide
............... 2.26.4.25.4.32. 4.33
Cassette Deck Service
........................... 7-41
Cassette Tape Player
.................. 3- 10. 3. 12. 3.20
Cassette Tape Player Care
........................ 3-27
Center Passenger Position
........................ 1-34
Chains. Safety
................................. 4-32
Chains. Tire
................................... 6-49
Changing a Flat Tire
............................. 5-23
Charging System Light
.......................... 2-55
Check Gages Light
.............................. 2-63
Check Oil Light
................................ 2-61
Checking
Your Restraint Systems .................. 1-52
Chemical Paint Spotting
.......................... 6-57
Child Restraints
................................ 1-4 I
Securing in a Rear Outside Seat Position ........... 1-43
Securing
in the Center Seat Position .............. 1-45
Securing
in the Right Front Seat Position .......... 1-46
TopStrap
................................... 1-42
Where to Put
........................... 1-4 I. 1-42
Cigarette Lighter
............................... 2-48
Circuit Breakers and Fuses
....................... 6-61
Cleaner. Air ................................... 6-19 Cleaning
Aluminum Wheels ............................ 6-55
Fabric
...................................... 6-50
Glass
....................................... 6-53
Inside
of Your Vehicle ......................... 6-50
Instrument Panel
............................. 6-53
Leather
..................................... 6-52
Outside
of Your Vehicle ........................ 6-54
Special Problems
............................. 6-51
Stains
...................................... 6-51
Tires
....................................... 6-56
Vinyl ....................................... 6-52
Wheels
..................................... 6-55
Windshield and Wiper Blades
................... 6-53
Clock. Setting the
................................ 3-8
Comfort Controls
................................ 3-1
Compact Disc Care
............................. 3-28
Compact Disc Player
............................ 3-16
Compact Spare Tire
............................. 5-36
Control of a Vehicle .............................. 4-5
ConvenienceNet
............................... 2-46
Convex Outside Mirror
.......................... 2-39
Coolant
....................................... 6-25
Heater. Engine
............................... 2-16
RecoveryTank
............................... 5-15
Courtesy Lamps
................................ 2-37
Courtesy Transportation
........................... 8-6
Cruise Control
................................. 2-32
Customer Assistance for Text Telephone Users
......... 8-3
Customer
Assistance Information ................... 8-1
Customer Satisfaction Procedure .................... 8-1
Cooling System
................................ 5-15
9-2

Damage. Finish ........................ . . 6-56
Damage. Sheet Metal
............................ 6-56
Daytime Running Lamps
......................... 2-36
Daytime Running Lamps Indicator Light
............ 2-62
Dead Battery
................................... 5-2
Defects. Reporting Safety
......................... 8-8
Defensive Driving ............................... 4- 1
Defogger. Rear Window .......................... 3-7
Defrosting
..................................... 3-6
Dimensions. Vehicle
............................ 6-69
Dome Lamps
.................................. 2-37
Door Locks
....................................... 2-5
Sliding ...................................... 2-9
DrivePosition
................................. 2-20
DriverPosition
................................. 1-16
Driving City
........................................ 4-17
Defensive
.................................... 4-1
Drunken ..................................... 4-2
Freeway
.................................... 4-18
InaBlizzard ................................. 4-24
In Foreign Countries ........................... 6-4
In the Rain .................................. 4-14
Night
...................................... 4-13
OnCurves
................................... 4-8
On Grades While Towing
a Trailer ............... 4-35
On Hill and Mountain Roads
.................... 4-20
On Snow and Ice
............................. 4-22
Through Water
................... ....... 4-16
WetRoads
.................................. 4-14
Winter ...................................... 4-22
With a Trailer ................................ 4-33
Drunken Driving
................................ 4-2 Electrical
Equipment. Adding
........ 2- 16. 3.26. 6-60
Electrical System
............................... 6-60
Engine ........................................ 4-9
Coolant
..................................... 6-25
Coolant Heater
............................... 2-16
Coolant Level Check
.......................... 7-41
Cooling System Capacity
....................... 6-67
Cover
...................................... 6-15
Exhaust
..................................... 2-26
FuseBlocks
............................ 6-61. 6-64
Identification
................................ 6-59
OilLevelCheck
.............................. 7-41
Overheating
................................. 5-13
Running While Parked
......................... 2-26
Specifications
................................ 6-67
Starting
..................................... 2-15
Temperature Gage
............................ 2-62
Engineoil
.................................... 6-11
Adding
..................................... 6-12
Additives
................................... 6-14
Checking
................................... 6-12
Pressure Gage
........................... .... 2-60
Used
....................................... 6-15
Whentochange .............................. 6-14
Exhaust. Engine
................................ 2-26
Express-Down Window
........................ 2-28
Fabric Cleaning
............................... 6-50
Fiberglass Springs
.............................. 6-57
Filling Your Tank
................................ 6-5
Filter. Air
..................................... 6-69
Filter. Engine Oil
............................... 6-69
Finish Care
.................................... 6-54
9-3

Finish Damage ................................. 6-56
First Gear
..................................... 2-20
Flashers. Hazard Warning
......................... 5-1
Flat Tire. Changing ............................. 5-23
Fluid Capacities
................................ 6-67
Fluids and Lubricants
............................ 7-47
Foreign Countries. Fuel
........................... 6-4
French Language Manual
11
Front Axle .................................... 6-24
Front Storage Area
.............................. 2-40
Front Towing
.............................. 5-9. 5- 10
Front Turn Signal Lamp Bulb Replacement .......... 6-40
Fuel
.......................................... 6-3
Canada
...................................... 6-3
Filling Your Tank
.............................. 6-5
Gage
....................................... 2-63
In Foreign Countries
........................... 6-4
Regulator
................................... 2-16
Fuses
and Circuit Breakers ....................... 6-61
Gages
.. ...........................
Engine Coolant Temperature .................... 2-62
Engine Oil Pressure
........................... 2-60
Fuel
....................................... 2-63
Garage Door Opener
............................ 2-43
Gear Positions. Automatic Transmission
............. 2- 18
GloveBox .................................... 2-40
Gross Axle Weight Rating
........................ 4-26
Gross Vehicle Weight Rating
...................... 4-26
Guide en FranGais
11
GVWR ....................................... 4-26
GAWR
....................................... 4-26
.. .................................
Halogen
Bulbs ................................ 6-36
Hatch Release
.................................. 2-11
Hazard Warning Flashers .......................... 5-1
Head Restraints ................................. 1-5
Headlamps .................................... 2-35
Bulb Replacement
............................ 6-36
Highkow Beam Changer
...................... 2-30
OnReminder
................................ 2-36
Wiring
..................................... 6-60
Hearing Impaired. Customer Assistance
.............. 8-3
Heating ........................................ 3-5
High-Beam Headlamps
.......................... 2-30
Highway Hypnosis
.............................. 4-20
Hill and Mountain Roads
......................... 4-20
Hitches. Trailer
................................. 4-32
Hood Checking Things Under
......................... 6-7
Prop
....................................... 6-10
Release
...................................... 6-8
Horn
......................................... 2-29
Hydroplaning
.................................. 4-16
Ignition Positions
.............................. 2-14
Inflation. Tire
.................................. 6-43
Inside Daymight Rearview Mirror
................. 2-38
Inspections
.................................... 7-45
Brakesystem
................................ 7-46
Drive Axle
.................................. 7-46
Exhaust Systems
............................. 7-45
Radiator and Heater Hose
...................... 7-45
Steering
.................................... 7-45
Suspension
.................................. 7-45
Throttle Linkage
.............................. 7-45
9-4