1998 CHEVROLET ASTRO ECU

Downloaded from www.Manualslib.com manuals search engine 9. Grasp the bottom of the cover and slide it rearward.
Then, lift it up and out of the vehicle.
If the seal does not release, use the pull strap on the
driver’s side above the rear mount.
Installing the Engine Cover
1.
2.
3.
4.
5.
6.
Lift the engine cover into the vehicle and slide it all
the way forward. Make sure the rubber seal
is over
the latches.
Install the two bolts at the engine cover.
Put the heater duct over the engine cover studs. Push
up on the duct gently until it snaps into place.
Reconnect the electrical connectors.
Install the engine cover extension by gently
squeezing the sides and sliding it into place.
Make
sure all of the fastener clips engage and the extension
fits properly in place. Replace and tighten the
two screws.
Install the two nuts to secure the extension in place.
6-18

Downloaded from www.Manualslib.com manuals search engine Air Cleaner See “Scheduled Maintenance” in the Index.
To remove the air filter, lift the hood, unsnap both clips
and remove the top. After changing the filter, snap both
clips to secure the air cleaner. Be sure the air cleaner lid
is correctly positioned
to seal out dust and contaminants
that are harmful to your engine.
Make sure the fresh air hose is still attached after the
filter change.
Refer
to the Maintenance Schedule to determine when to
replace the air filter and the crankcase ventilation filter.
-
&A CAUTION:
Operating the engine with the air cleaner off can
cause you
or others to be burned. The air cleaner
not only cleans the air, it stops flame if the engine
backfires.
If it isn’t there, and the engine
backfires, you could be burned. Don’t drive with
it
off, and be careful working on the engine with
the air cleaner off.
I NOTICE:
If the air cleaner is off, a backfire can cause a
damaging engine fire. And, dirt can easily get
into your engine, which will damage it. Always
have the air cleaner in place when you’re driving.
6-19

Downloaded from www.Manualslib.com manuals search engine Tire Chains
NOTICE:
If your vehicle has P235/65R15 size tires, don’t
use tire chains. They can damage your vehicle
because there’s not enough clearance.
Use another type
of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions. Follow that manufacturer’s
instructions.
To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it’s contacting your vehicle, and don’t
spin your wheels.
NOTICE: (Continued) NOTICE: (Continued)
If you do find traction devices that will fit, install
them on the rear tires.
If you have other size tires, use tire chains only
where legal and only when you must. Use only
SAE
Class “S” type chains that are the proper
size for your tires. Install them on the rear axle
tires and tighten them as tightly as possible with
the ends securely fastened, Drive slowly and
follow the chain manufacturer’s instructions,
If
you can hear the chains contacting your vehicle,
stop and retighten them.
If the contact continues,
slow down until it stops. Driving too fast or
spinning the wheels with chains on will damage
your vehicle.
6-50

Downloaded from www.Manualslib.com manuals search engine FuseKircuit Breaker Usage
12
13
14
15
16
17
L, M 1, M2 Blower Motor, Rear A/C
Relay Coil, Front Cont. Temp. Door
Motor,
HI Blower Relay, Defogger
Timer Coil
Cigar Lighter, Door Lock Switches,
Dutch Door Release Module
Cluster Illum, HVAC Controls, Chime
Module, Radio Illumination, Rear Heat
Switch Illumination, Rear
Wiper/Washer Switch Illumination,
Rear Liftgate Switch Illumination,
Remote Cassette Illumination, O/H
Console
DRL Lamps
Front Turn Signals, Rear Turn Signals,
Trailer Turn Signals, Back-up Lamps,
BTSI Solenoid
Radio: ATC (Standby), 2000 Series
(Main Feed), Rear Seat Audio Controls 19
20
FuseKircuit
Breaker Usage
18 VCM-Ign 3, VCM-Brake, LCWAL,
Cruise Stepper Motor Signal
Radio: ATC (Main Feed),
2000 Series
(Standby)
PRNDL/ Odometer, TCC Enable and
PWM Solenoid, Shift A and Shift B
Solenoids, 3-2 Downshift Solenoid
21
22
23
24
A
B Not Used
Security/Steering Module
Rear Wiper, Rear Washer Pump
Not Used (Circuit Breaker) Power Door
Lock
Relay, 6-way Power Seat, Remote
Control Door Lock Receiver, Dutch
Door Module, Dutch Door Release
(Circuit Breaker) Power Windows
6-63

Downloaded from www.Manualslib.com manuals search engine Fuse/Circuit Breaker Usage
UPFIT-BATT Upfitter Battery Power Stud, Trailer
UPFIT-ACCY Upfitter Accessory Relay
Wiring
Harness
Spare
Fuse Puller*
Spare
Spare
ECM-B
HORN
A/C COMP
RR DEFOG
ENG-I
Fuse/Circuit Breaker Usage
IGN-E
ECM-I
Not used
LIGHTING
Not used
Not used Fuel Pump Relay and Motor, VCM,
Oil Pressure Switch/Sender
Horn Relay and Horn
A/C Enable Relay and Compressor
Heater-A/C Control Selector Switch,
Rear Window Defogger
Oxygen Sensors, Camshaft Position
Sensor, Mass Air Flow Sensor,
Evaporative Emission Canister Purge
Solenoid, Linear EGR Valve
Solenoid, VCM EGR HI BATT
IGN A
IGN B
ABS
NC
RR HTRIAC
Spare A/C
Enable Relay Coil
Fuel Injectors
1-6, Crankshaft
Position Sensor, VCM, Coil Driver
Module (EST)
Park Lamps Fuse, DRL Fuse,
Headlamp and Panel Dimmer Switch
SteeringBecurity Fuse, Courtesy
Fuse, ACSY CB, Stop/Hazard Fuse,
Auxiliary Power Fuse, Cigar Lighter
Fuse, Radio Battery Fuse
Starter Relay, Ignition Switch
Ignition Switch
Electronic Brake Control Module Blower Motor Resistor, Blower
Relay
Auxiliary Heater NC Relay
Not used
*A fuse puller is included
in the underhood electrical
center. You will also find spare fuses.
6-65

Downloaded from www.Manualslib.com manuals search engine Brake (Continued)
Wear
..................................
Brakes. Anti-Lock .........................
Braking ..................................
Braking in Emergencies .....................
Break-In. New Vehicle .....................
BTSI Check ..............................
Built-in Child Restraint .....................
Bulb Replacement ........................
System Warning Light ....................
Canadian Roadside Assistance ..............
Capacities and Specifications .................
Carbon Monoxide ..... 2- 13.2.27.2.30.4.25.
Care
of Compact Disc Player .................
Care of Your Cassette Tape Player .............
Care of Your Compact Discs .................
Cassette Deck Service ......................
Cassette Tape Player .......................
Cassette Tape Player Care ...................
Center Passenger Position ...................
Certification/Tire Label .....................
Chains. Safety ............................
Chains. Tire ..............................
Changing a Flat Tire ........................
Charging System Light .....................
Check Gages Light .........................
Checking Transmission Fluid Hot .............
Checking Your Restraint Systems .............
Chemical Paint Spotting .....................
Child Restraints ...........................
Care ..................................
Cleaning ...............................
9-2
..... 6-34
..... 2-60
...... 4-7
...... 4-6
...... 4-8
..... 2-15
..... 7-43
..... 1-44
.... 6-36
...... 8-7
..... 6-67
4.32. 4.33
..... 3-30
..... 3-29
..... 3-30
..... 7-41
3-1 1. 3.13
..... 3-29
..... 1-38
..... 4-26
..... 4-32
..... 6-50
..... 5-23
..... 2-59
..... 2-66
..... 6-21
..... 1-68
..... 6-57
..... 1-52
..... 6-53
..... 6-53 Securing
in a Rear
Outside Seat Position ........... 1-58
Securing in the Center Seat Position .............. 1-60
Securing
in the Right Front Seat Position .......... 1-62
TopStrap
................................... 1-58
Where to Put ........................... 1-56. 1-57
Cigarette Lighter ............................... 2-48
Circuit Breakers and Fuses
....................... 6-61
Cleaner.
Air Filter .............................. 6-19
Cleaning
Aluminum Wheels ............................ 6-56
Built-in Child Restraint ........................ 6-53
Fabric
...................................... 6-52
Glass ....................................... 6-54
Inside
of Your Vehicle ......................... 6-51
Instrument Panel
............................. 6-53
Leather
..................................... 6-53
Outside of Your Vehicle
........................ 6-55
Stains ...................................... 6-52
Tires
....................................... 6-56
Wheels
..................................... 6-56
Windshield and Wiper Blades
................... 6-54
Clock. Setting the
................................ 3-9
Comfort Controls
................................ 3-2
Compact Disc Care
............................. 3-30
Compact Disc Player
....................... 3-19. 3-24
Compact Spare Tire
............................. 5-36
Control
of a Vehicle .............................. 4-5
ConvenienceNet
............................... 2-47
Convex Outside Mirror
.......................... 2-41
Coolant
....................................... 6-25
Heater. Engine
............................... 2-18
Recovery Tank ............................... 5-16
Special Problems
................. ....... 6-52
Vinyl ....................................... 6-53

Downloaded from www.Manualslib.com manuals search engine High-Beam Headlamps .......................... 2-32
Highway Hypnosis
.............................. 4-20
Hill and Mountain Roads
......................... 4-21
Hitches. Trailer
................................. 4-32
Hood Checking Things Under
......................... 6-7
Prop
....................................... 6-10
Release
...................................... 6-8
Horn
......................................... 2-30
Hydroplaning
................................ 4- I6
Ignition Positions .............................. 2- 16
Ignition Transmission Lock Check
................. 7-44
Inflation, Tire
.................................. 6-43
Inside Daymight Rearview Mirror
................. 2-40
Inspections .................................... 7-45
Brakesystem
................................ 7-46
DriveAxle
.................................. 7-46
Exhaust Systems
............................. 7-45
Radiator and Heater Hose
...................... 7-45
Steering
.................................... 7-45
Suspension
.................................. 7-45
Throttle System
.............................. 7-46
Transfer Case (All-Wheel Drive)
................ 7-46
Instrument Panel
............................... 2-54
Brightness Control
............................ 2-37
Cleaning
.................................... 6-53
Cluster
..................................... 2-56
FuseBlock
.................................. 6-61
Interior Lamps
................................. 2-38
Jack, Tire
............... ............... 5-24
Jump Starting
................................... 5-3
Key Lock Cylinders Service ..................... 7-42
Keyless Entry System
............................ 2-7
Keys
.......................................... 2-2
Labels CertificationiTire
............................. 4-26
Service Parts Identification
..................... 6-59
Tire-Loading Information
....................... 4-26
Vehicle Identification Number
................... 6-59
Dome
...................................... 2-39
Exterior
.................................... 2-37
Interior
..................................... 2-38
OnReminder
................................ 2-37
Latches. Seatback
................................ 1-5
Leaving Your Vehicle
............................. 2-7
Leaving Your Vehicle
with the Engine Running ....... 2-25
Lighter
....................................... 2-48
Lights
Air Bag Readiness ....................... 1-27. 2-58
Anti-Lock Brake System Warning
............ 2-61. 4-7
Brake System Warning
......................... 2-60
Charging System
............................. 2-59
CheckGages
................................ 2-66
Daytime Running Lamps Indicator
............... 2-66
Safety Belt Reminder
..................... 1 - 13. 2-58
Security
.................................... 2-65
Service Engine Soon
.......................... 2-62
Loading Your Vehicle
........................... 4-26
Locks Cylinders
................................... 7-42
Door
........................................ 2-6
Ignition Transmission Lock Check
............... 7-44
Lamps
9-5

Downloaded from www.Manualslib.com manuals search engine Locks (Continued) Key Lock Cylinder Service
..................... 7-42
PowerDoor
.................................. 2-6
Sliding Door Child Security
..................... 2- 1 1
Lubricants and Fluids ............................ 7-47
Lubrication Service. Body
........................ 7-42
Luggagecarrier
................................ 2-47
Lumbar Controls
............................ 1-3
Maintenance. Normal Replacement Parts
........... 6-69
Maintenance Record
............................ 7-49
Maintenance Schedule
............................ 7- I
Long Trip/Highway ........................... 7-29
Long Trip/Highway Definition
................... 7-6
Long Trip/Highway Intervals
..................... 7-7
Owner Checks and Services
..................... 7-41
Periodic Maintenance Inspections
................ 7-45
Recommended Fluids and Lubricants
............. 7-47
Scheduled Maintenance Services
.................. 7-4
Short Trip/City
................................ 7-8
Short Trip/City Definition
....................... 7-5
Short Trip/City Intervals ........................ 7-5
Maintenance. Underbody
......................... 6-57
Maintenance When Trailer Towing
................. 4-36
Malfunction Indicator Lamp
...................... 2-62
ManualFrontSeat
............................... 1-2
Manual Lumbar Support
.......................... 1-3
Methanol ...................................... 6-4
Mirrors
....................................... 2-40
Convex Outside
.............................. 2-41
Inside Day/Night Rearview
..................... 2-40
Outside
..................................... 2-40
Visor Vanity
................................. 2-49 MMT
......................................... 6-4
Model Reference
................................. vi
Mountain Roads
................................ 4-21
Net. Convenience
.............. ........ 2-47
Neutral
....................................... 2-20
New Vehicle Break-In
........................... 2-15
Nightvision
................................... 4-14
Normal Maintenance Replacement Parts
............. 6-69
Odometer
.................................... 2-57
Odometer. Trip
................................. 2-57
Off-Road Recovery
............................. 4-10
Oil. Engine
.................................... 6-10
Opener. Garage Door
............................ 2-44
Outside Mirror
................................. 2-40
Overhead Console
.............................. 2-43
Overheating Engine
............................. 5-13
Owner Checks and Services
....................... 7-41
Owner Publications. Ordering
.............. 8- 11. 8- 12
Paint Spotting. Chemical ........................ 6-57
Park
......................................... 2-19
Shifting Into
................................. 2-23
Shifting Out of
............................... 2-26
Parking AtNight
.................................... 2-14
Brake
...................................... 2-22
Brake Mechanism Check
....................... 7-44
Lots
....................................... 2-14
With
a Trailer ................................ 4-36
Over
Things That
Burn ........................ 2-26
9-6