1997 CHEVROLET EXPRESS air conditioning

Downloaded from www.Manualslib.com manuals search engine Air Conditioning Heating
Before using your
vehicle’s air conditioning, open the
windows to clear the vehicle of hot air. This reduces the
time it takes for your vehicle
to cool down. Then keep
your windows closed for the air conditioner to work at
its best.
You can use MAX
A/C with the temperature knob in the
blue area, when it’s really hot outside and you need to
cool the inside air quickly. MAX A/C lets in only a little
air from the outside.
If you first use MAX
A/C, you can then use A/C with
the temperature knob in the blue area, as
soon as the
vehicle has cooled down,
so outside air will be going
through your vehicle.
If your vehicle has rear air conditioning, setting it on
LO may enhance front A/C performance by allowing
trapped refrigerant in rear lines to circulate.
When the air conditioning, DEFROST or BLEND is on,
you may notice a slight increase or decrease in engine
speed, due to compressor operation. This is normal
because the system is designed to cycle the compressor
on and off to keep the desired temperature. On
cold days, use HEATER with the temperature knob
in the red area. Outside air will be brought in through
the floor outlets. The heater works best if you keep your
windows closed while using it.
If you use the optional engine coolant heater before
starting your engine, your heating system will produce
warmer air faster to heat the passenger compartment in
cold weather. See “Engine Coolant Heater” in the Index.
Ventilation Tips
Keep the hood and front air inlet free of ice, snow,
or any other obstruction (such as leaves). The heater
and defroster will work far better, reducing the
chance of fogging the inside of your windows.
When you enter a vehicle in cold weather, turn the
blower fan to HI for a few moments before driving
off. This helps clear the intake ducts of snow and
moisture, and reduces the chance of fogging the
inside of yow windows.
3-7

Downloaded from www.Manualslib.com manuals search engine Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section begins with service and fuel information,
and then it shows how to check important fluid and lubricant levels. There
is also technical information about your
vehicle, and
a part devoted to its appearance care.
6-2
6-3
6-5
6-5
6-7
6-1 1
6-12 6-17
6-18
6-22
6-22
6-25
6-26 6-26
6-27
6-28 6-32 Service
Fuel (Gasoline Engine)
Fuels in Foreign Countries
Filling Your Tank
Checking Things Under the Hood
Noise Control System
Engine Oil (Gasoline Engine)
Air Cleaner (Gasoline Engines)
Automatic Transmission Fluid
Rear Axle
Engine Coolant Radiator Pressure Cap
Thermostat Power Steering Fluid
Windshield Washer Fluid
Brakes
Battery 6-32
6-32
6-40
6-4
1
6-49
6-50
6-54
6-55
6-55
6-55
6-56
6-57
6-5 8
6-59
6-63
6-66
6-67 Bulb Replacement
Halogen Bulbs
Windshield Wiper Blade Replacement
Tires Appearance Care
Cleaning the Inside
of Your Vehicle
Cleaning the Outside of Your Vehicle
Cleaning Aluminum Wheels
(If Equipped)
Cleaning Tires Sheet Metal Damage
Finish Damage
Appearance Care Materials Chart
Vehicle Identification Number (VIN)
Electrical System
Capacities and Specifications
Air Conditioning Refrigerants
Lamp and Bulb Data

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.
1
,A CAUTION: I
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.
I A CAUTION:
i
Things that burn can get on hot engine parts and
start
a fire. These include liquids like gasoline,
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.
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.
6-10
. .~

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.
,
[T)
Name
BLOWR
ABS
Circuits Protected
Blower Motor
Electronic Brake Control Module
Name
IGN-B
IGN-A
BATT
LIGHTING
RR BLOWER
ENG-
1
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)
6-63

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, Crankshaft 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
Capacities and Specifications
Replacement Parts
Replacement part numbers listed in this section are
based on the latest information available at the time
of
printing, and are subject to change. If a part listed in this
manual
is not the same as the part used in your vehicle
when
it was built, or if you have any questions, please
contact your
GM truck dealer.
These specifications are for information only. If you
have any questions, see the service manual for the
chassis
or refer to the body manufacturer’s publications.

Downloaded from www.Manualslib.com manuals search engine Normal Replacement Parts
Engine VIN
Oil Filter
Air Cleaner Filter*
PCV Valve
Spark Plugs
Fuel Filter
Radiator Cap
*Replace with AC Ai
“VORTEC”4300
w
PF52
A9 17C
CV789C
41-932 GF48
1
RC36
“VORTEC”5000
r Filter, Part No. A917C and fi
Air Conditioning Refrigerant Capacity
M
PF1218
A917C
cv774c
4 1-932 GF48
1
RC36
or severe dua
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. “VORTEC”5700
R
PF1218
A9 17C
cv774c
4 1-932
GF48
1
RC36
“VORTEC”7400
J
PF1218
A917C
cv774c
41-932 GF48
1
RC36
;ty conditions, use, AC Air Filter, Part No. 1236C.
TYPE QTY Front Only QTY Front and Rear
Refrigerant 3.00 Ibs. (1.36 kg) 4.875 Ibs. (2.2 1 kg)
R- 134A
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.
Tf you’re not sure, ask your GM dealer.

Downloaded from www.Manualslib.com manuals search engine Section 9 Index
Adjustable Mast Antenna ........................ 3-28
AirBag
....................................... 1-25
Adding Equipment
............................ 1-32
How Does
it Restrain .......................... 1-30
How it Works
................................ 1-28
Location
.................................... 1-28
Readiness Light
......................... 1.27. 2-51
Servicing
................................... 1-31
What Makes it Inflate
.......................... 1-29
What Will
You See After it Inflates ............... 1-30
When Should it Inflate
......................... 1-29
Aircleaner
.................................... 6-17
Air Conditioning Refrigerants
..................... 6-67
Alignment and Balance. Tire
...................... 6-47
Aluminum Wheels. Cleaning
...................... 6-55
Antenna. Adjustable Mast
........................ 3-28
Antenna. Power
................................ 3-28
Antifreeze
..................................... 6-22
Anti-Lock Brake System Warning Light
................ 2-53. 4-7
Brakes
...................................... 4-7
Appearancecare
............................... 6-49
Air Conditioning
................................ 3-7
Air Control. Climate Control System
................. 3-3 Appearance
Care Materials
....................... 6-57
Arbitration Program
.............................. 8-9
Ashtrays ...................................... 2-43
Audio Systems
.................................. 3-8
Automatic Transmission
Transmission Check
........................... 7-46
Transmission Fluid
............................ 6-18
Transmission Operation
........................ 2-20
Shifting
..................................... 2-20
Transmission Park Mechanism Check
............. 7-48
Axle. Locking Rear
............................. 2-23
Axle. Rear
.................................... 6-22
Battery
...................................... 6-32
Jump Starting
................................. 5-3
Replacement. Remote Keyless Entry
............... 2-8
Warnings
.................................... 5-3
Warnings
.................................... 5-3
BBB Auto Line
................................. 8-9
Before Leaving on a Long Trip
.................... 4-21
Better Business Bureau Mediation
................... 8-9
Blizzard. Driving In
............................. 4-25
9-1

Downloaded from www.Manualslib.com manuals search engine Paint Spotting. Chemical ........................ 6-56
Park Automatic Transmission
....................... 2-24
Shifting Out of
............................... 2-27
AtNight
.................................... 2-15
Brake
...................................... 2-23
Brake Mechanism Check
....................... 7-48
Lots
....................................... 2-15
OverThingsThatBurn
........................ 2-27
With a Trailer
................................ 4-37
Passenger Position
.............................. 1-25
Passenger Temperature Control
..................... 3-5
Passing
....................................... 4-12
Periodic Maintenance Inspections
.................. 7-49
Power
Antenna Mast Care
............................ 3-28
DoorLocks
................................... 2-5
Option Fuses
................................ 6-60
Remote Control Mirror
........................ 2-43
Seat
......................................... 1-3
Steering ..................................... 4-9
Steering Fluid
................................ 6-26
Windows
................................... 2-29
Power Seat
Pregnancy. Use of Safety Belts
.................... 1-24
Problems on the Road
............................ 5-1
Publications. Service and Owner ................... 8-1 1
Shifting Into ................................. 2-24
Parking Radiator
..................................... 5-19
Radiator Pressure Cap
............................ 6-25
Radio Reception
................................ 3-26
Radios
......................... 3.9.3.11.3.13. 3.18
Rain. Driving In
................................ 4-16
Reading Lamps
................................ 2-41
Rear Axle
....................................... 6-22
Door Security Locks
........................... 2-5
Outside Seat Position
.......................... 1-32
Seatpassengers
.............................. 1-32
Towing
..................................... 5-11
Rearview Mirror
................................ 2-43
Reclining Front Seatbacks
......................... 1-3
Recommended Fluids and Lubricants
............... 7-51
Recovery Tank. Coolant
.......................... 5-16
Refrigerants. Air Conditioning
.................... 6-67
Remote Compact Disc Player
..................... 3-22
Replacement Bulbs
...................................... 6-68
Parts
....................................... 6-67
Wheel
...................................... 6-47
Replacing Safety Belts
........................... 1-52
Reporting Safety Defects
......................... 8-10
Restraints
Checking
................................... 1-52
Child
....................................... 1-40
Head
........................................ 1-5
System Check
................................ 7-46
Reverse. Automatic Transmission
.................. 2-21
Replacing Parts After
a Crash
................... 1-52
9-7