1998 CHEVROLET EXPRESS air conditioning

Downloaded from www.Manualslib.com manuals search engine Checking Things Under the Hood
A CAUTION:
If your vehicle has air conditioning, the auxiliary
engine fan under the hood can start up and
injure
you even when the engine is not running.
Keep hands, clothing and tools away from any
underhood electric fan.
A CAUTION:
I
Things that burn can get on hot engine parts
and start
a fire. These include liquids like
gasoline or diesel fuel, oil, coolant, brake fluid,
windshield washer and other fluids, and plastic
or rubber.
You or others could be burned. Be
careful not
to drop or spill things that will burn
onto
a hot engine.
To open the hood, first
pull this handle inside the
vehicle. It is just
in front of
the driver’s side door frame
near the floor.
6-8

Downloaded from www.Manualslib.com manuals search engine If your vehicle has a 7.4 liter engine and air
conditioning, your vehicle will have a auxiliary
engine fan in addition to
the belt driven fan.
Before closing the hood, be sure all the filler caps
are on properly.
Then lift the hood to relieve pressure
on the hood prop.
Remove the hood prop from the slot in the hood and
return the prop to its retainer. Then just let the hood
down and close it firmly.
Noise Control System
The following information relates to compliance with
Federal noise emission standards for vehicles with a
Gross Vehicle Weight Rating
(GVWR) of more than
10,000 lbs. (4 536 kg). The Maintenance Schedule
provides information on maintaining the noise control
system
to minimize degradation of the noise emission
control system during the life
of your vehicle. The
noise control system warranty is given in your
Warranty booklet.
These standards apply only
to vehicles sold in the
United States.
Tampering With Noise Control
System Prohibited
Federal law prohibits the following acts or the causing
thereof
1.
2.
The removal or rendering inoperative by any person,
other than for purposes
of maintenance, repair or
replacement, of any device or element of design
incorporated into any new vehicle for the purpose
of noise control, prior
to its sale or delivery to the
ultimate purchaser or while it is in use; or
The use of the vehicle after such device or element
of design has been removed or rendered inoperative
by any person.
Among
those acts presumed to constitute tampering are
the acts listed below.
Insulation:
Removal of the noise shields or underhood insulation.
Engine:
Removal or rendering engine speed governor (if
equipped) inoperative
so as to allow engine speed to
exceed manufacturer specifications.

Downloaded from www.Manualslib.com manuals search engine Engine Compartment Fuse Relay Center
The fuse block is on the driver’s side of the engine
compartment at the rear.
U
NAME
IGN-B
IGN-A
BATT
LIGHTING
RR BLOWER
ENG-I
NAME
BLOWER ABS
CIRCUITS PROTECTED
Front Blower Motor
Electronic Brake Control Module AIC
SPARE
AUX A
AUX B
RH-HDLP
CIRCUITS PROTECTED
Ignition
Switch
Starter Relay, Ignition Switch
Instrument Panel
Fuse Block
Instrument Panel Fuse Block,
Headlamp Switch
Rear Auxiliary Blower Motor Relays
Heated
02 Sensors, Mass Air Flow
Sensor, EGR Valve Solenoid, Evap
Canister Purge Valve, Crankshaft
Position Sensor, Secondary Air Injection Relay (Diesel), Water in
Fuel Sensor (Diesel), Fuel Heater
(Diesel), Glowplug Relay (Diesel),
Wastegate Solenoid (Diesel)
Air Conditioning Clutch Relay
Spare Fuses
Upfitter Provisions Upfitter Provisions
Right-hand Headlamp (Export only)

Downloaded from www.Manualslib.com manuals search engine NAME
RH-HIBM
ECM-I
HORN
LH-HDLP
LH-HIBM
FUEL
SOL
IGN-E
ECM-B
CIRCUITS PROTECTED
Right-hand High-beam Headlamp
(Export only)
Ignition Coil, Camshaft Position
Sensor, VCM, Fuel Injectors, Coil
Driver
Horn Relay, Underhood Lamp(s)
Left-hand Headlamp (Export only)
Left-hand High-beam Headlamp
(Export only)
PCM, Fuel Solenoid Driver, Engine
Shutoff Solenoid
Air Conditioning Clutch Relay
Fuel Pump Relay, VCM, PCM, Fuel
Pump and Engine Oil Pressure
Switch
Replacement Bulbs
LAMP OR BULB
Sealed Beam Headlamps
Composite Low-Beam
Headlamps
Composite High-Beam
Headlamps
Front Sidemarker Lamp
Front Parking and Turn Lamp
Rear Parking Lamp
Rear Stop and Turn Lamp
Back-up Lamp
Back-up Lamp
Rear Parking, Stop, and
Turn Lamp
CHMSL
License Plate Lamp
Underhood Lamp
Reel Lamp
Reading Lamps
Sunshade Vanity Mirror
QTY NUMBER
2
H6054
2 6052
2
2
4
2
2
6
4
9005
194
2357NA 3057
3057
3 156
1156
1157
921 194
232 232
211-2
74

Downloaded from www.Manualslib.com manuals search engine Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same.
If the air conditioning system in your vehicle needs
refrigerant, be sure the proper refrigerant is used.
If
you’re not sure, ask your dealer.
TYPE QTY Front Only QTY Front
and Rear
Refrigerant 3.00 lbs. (1.36 kg) 4.5 lbs. (2.04 kg)
R- 134a
Air Conditioning Refrigerant Capacity
NOTICE:
R-134a refrigerant is not compatible with R-12
refrigerant in an air conditioning system. R-12 in
an R-134a system will cause compressor failure,
refrigerant
oil sludge, or poor air conditioning
system performance.
6-70

Downloaded from www.Manualslib.com manuals search engine Part C: Periodic Main A !n: Ice
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 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 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.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the outside
of the radiator and air conditioning condenser. To help
ensure proper operation, a pressure test
of the cooling
system and pressure cap is recommended at least once
a year.
7-42

Downloaded from www.Manualslib.com manuals search engine Section 9 Index
Air Bag .......................
Adding Equipment .............
How Does it Restrain ...........
How it Works .................
Location .....................
Readiness Light ...............
Servicing ....................
What Makes it Inflate ...........
What Will You See After it Inflates
When Should it Inflate
..........
Aircleaner .....................
Air Conditioning ................
Air Conditioning Refrigerants ......
Alignment and Balance. Tire .......
Aluminum Wheels. Cleaning .......
Antenna. Power .................
Antifreeze ......................
Anti-Lock Brake System Warning Light
.....
Brakes ......................
Appearance Care ................
Appearance Care Materials ........
Arbitration Program ..............
Ashtrays .......................
Audio Systems ..................
............... 1-26
............... 1-33
............... 1-31
............... 1-29
............... 1-29
.......... 1.28. 2.54
............... 1-32
............... 1-30
............... 1-31
............... 1-30
............... 6-16
................ 3-6
............... 6-70
............... 6-48
............... 6-56
............... 3-27
............... 6-21
........... 2.57. 4.7
................ 4-7
............... 6-51
............... 6-59
................ 8-9
............... 2-48
................ 3-7 Automatic
Transmission Check
........................... 7-39
Transmission Fluid
............................ 6-17
Transmission Operation
........................ 2-21
Shifting
..................................... 2-21
Transmission Park Mechanism Check
............. 7-41
LockingRear
................................ 2-30
Rear
....................................... 6-21
Axle
Battery
...................................... 6-31
Jump Starting
................................. 5-3
Replacement. Remote Keyless Entry
............... 2-8
Warnings .................................... 5-3
BBB Auto Line
................................. 8-9
Before Leaving on a Long Trip
.................... 4-20
Better Business Bureau Mediation
................... 8-9
Blizzard ...................................... 4-25
Brake Adjustment
.................................. 6-31
Fluid
....................................... 6-27
Master Cylinder
.............................. 6-27
Parking
..................................... 2-24
PedalTravel
................................. 6-30
Replacing System Parts
........................ 6-31
9-1

Downloaded from www.Manualslib.com manuals search engine Halogen Bulbs ................................ 6-32
Hazard Warning Flashers
.......................... 5-2
Head Restraints
................................. 1-5
Headlamps
.................................... 2-40
Bulb Replacement
............................ 6-33
High/Low Beam Changer
...................... 2-35
OnReminder
................................ 2-41
Wiring
..................................... 6-61
Hearing Impaired. Customer Assistance
.............. 8-4
Heater Controls
................................. 3-2
HeaterIAir Conditioning Controls
................... 3-3
Heating
........................................ 3-6
High-Beam Headlamps
.......................... 2-35
Highway Hypnosis
.............................. 4-2 I
Hill and Mountain Roads ......................... 4-21
Hitches. Trailer
................................. 4-32
Hood Checking Things Under
......................... (5-8
Prop ........................................ 6-9
Release
...................................... 6-8
Horn ......................................... 2-33
Hydroplaning
.................................. 4-17
Ignition Switch
................................ 2-17
Ignition Transmission Lock Check
................. 7-41
Inflation, Tire
.................................. 6-42
Inside Day/Night Rearview Mirror
................. 2-45
Inspections
.................................... 7- 42
Brakesystem
................................ 7-43
Engine Cooling System
........................ 7-42
Exhaust Systems
............................. 7-42 RearAxle
................................... 7-43
Steering
.................................... 7-42
Suspension
.................................. 7-42
Throttle System
.............................. 7-43
Instrument Cluster
.............................. 2-51
Instrument Panel
............................... 2-50
Brightness Control
............................ 2-40
FuseBlock
.................................. 6-62
Interior Lamps
................................. 2-43
Cleaning
.................................... 6-53
.................................... J ack.
Tire 5-23
Jump Starting
................................... 5-3
Keyless Entry System
........................... 2-6
Keys
.......................................... 2-2
Labels Certification
................................. 4-27
Certificationmire
............................. 4-27
Service
Parts Identification ..................... 6-60
Tire-Loading Information
...................... 4-27
Vehicle Identification Number
................... 6-60
Dome
...................................... 2-43
Exterior
.................................... 2-40
Interior
..................................... 2-43
OnReminder
................................ 2-41
Panel
....................................... 2-40
Underhood
.................................. 2-44
Lamps