1998 GMC SAVANA air conditioning

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:
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.
I
6-8
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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. 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
2. 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:
0 Removal of the noise shields or underhood insulation.
Engine:
0 Removal or rendering engine speed governor (if
equipped) inoperative
so as to allow engine speed to
exceed manufacturer specifications.
6-11
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Engine Compartment Fuse Relay Center
The fuse block is on the driver’s side of the engine
compartment at the rear.
NAME
BLOWER
ABS
CIRCUITS PROTECTED
Front Blower Motor
Electronic Brake Control Module
NAME
IGN-B
IGN-A
BATT
LIGHTING
CIRCUITS PROTECTED
Ignition Switch
Starter Relay, Ignition Switch
Instrument Panel Fuse Block
Instrument Panel Fuse Block,
Headlamp Switch
RR BLOWER Rear Auxiliary Blower Motor Relays
ENG-I
AIC
SPARE
AUX A
AUX B
RH-HDLP
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)
6-65
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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
1
1
1
6
4
9005
194
2357NA
3057
3057
3156
1156 1157
92
1
194
232
232
211-2
74
6-66
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Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same.
If the air conditioning system in your vehicle needs
refrigerant, be swe 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
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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 pour 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
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Section 9 Index
Air Bag ...................................... 1-26
Adding Equipment ............................ 1-33
How Does it Restrain .......................... 1-3 I
How it Works ................................ 1-29
Location
.................................... 1-29
Readiness Light
......................... 1.28. 2-54
Servicing
................................... 1-32
What Makes
it Inflate .......................... 1-30
What Will You See After it Inflates ............... 1-3 1
When Should it Inflate ......................... 1-30
Aircleaner
.................................... 6-16
Air Conditioning
................................ 3-6
Air Conditioning Refrigerants
..................... 6-70
Alignment and Balance. Tire
...................... 6-48
Aluminum Wheels. Cleaning
...................... 6-56
Antenna. Power
................................ 3-27
Antifreeze
..................................... 6-2 1
Anti-Lock
Brake System Warning Light
................ 2.57. 4-7
Brakes
...................................... 4-7
Appearancecare
............................... 6-51
Appearance Care Materials
....................... 6-59
Arbitration Program
.............................. 8-9
Audio Systems
.................................. 3-7
Ashtrays
...................................... 2-48 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
..
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Halogen Bulbs ................................ 6-32
Hazard Warning Flashers
.......................... 5-2
Head Restraints
................................. 1-5
Headlamps
.................................... 2-40
Bulb Replacement
............................ 6-33
HighLow Beam Changer
...................... 2-35
OnReminder
................................ 2-41
Wiring
..................................... 6-61
Hearing Impaired. Customer Assistance
.............. 8-4
Heater Controls
................................. 3-2
Heater/Air Conditioning Controls
................... 3-3
High-Beam Headlamps
.......................... 2-35
Highway Hypnosis
.............................. 4-21
Hill and Mountain Roads
......................... 4-21
Hitches. Trailer
................................. 4-32
Hood Checking Things Under
......................... 6-8
Release ...................................... 6-8
Horn ......................................... 2-33
Hydroplaning
.................................. 4-17
Heating
........................................ 3-6
Prop
........................................ 6-9
Ignition Switch ................................ 2- 17
Inflation. Tire
.................................. 6-42
Inside Daymight Rearview Mirror
................. 2-45
Inspections
.................................... 7-42
Brakesystem
................................ 7-43
Engine Cooling System
........................ 7-42
Exhaust Systems
............................. 7-42
Ignition Transmission Lock
Check
................. 7-41 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
Cleaning
.................................... 6-53
FuseBlock
.................................. 6-62
Interior Lamps
................................. 2-43
Jack. Tire
.................................... 5-23
Jump Starting
................................... 5-3
Keyless Entry System
........................... 2-6
Keys
.......................................... 2-2
Labels Certification
................................. 4-27
Certificatioflire
............................. 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
9-5
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