2003 GMC SAVANA air conditioning

Instrument Panel Overview...............................3-2
Hazard Warning Flashers................................3-4
Other Warning Devices...................................3-5
Horn .............................................................3-5
Tilt Wheel.....................................................3-5
Turn Signal/Multifunction Lever.........................3-6
Exterior Lamps.............................................3-12
Interior Lamps..............................................3-14
Accessory Power Outlets...............................3-16
Ashtrays and Cigarette Lighter........................3-16
Climate Controls............................................3-17
Climate Control System.................................3-17
Rear Heating System....................................3-18
Rear Air Conditioning and Heating System.......3-19
Warning Lights, Gages and Indicators.............3-23
Instrument Panel Cluster................................3-24
Speedometer...............................................3-25
Safety Belt Reminder Light.............................3-26
Air Bag Readiness Light................................3-27
Air Bag Off Light..........................................3-28
Charging System Light..................................3-29
Voltmeter Gage............................................3-30
Brake System Warning Light..........................3-31
Anti-Lock Brake System Warning Light.............3-32
Engine Coolant Temperature Gage..................3-32
Low Coolant Warning Light............................3-33
Malfunction Indicator Lamp
.............................3-33Oil Pressure Gage........................................3-36
Change Engine Oil Light................................3-37
Security Light...............................................3-38
Cruise Control Light......................................3-38
Daytime Running Lamps Indicator Light...........3-39
Tow/Haul Mode Light....................................3-39
Check Gages Warning Light...........................3-39
Fuel Gage...................................................3-40
Audio System(s).............................................3-41
Setting the Time for Radios without Radio
Data Systems (RDS)..................................3-41
Setting the Time for Radios with Radio
Data Systems (RDS)..................................3-41
AM-FM Radio...............................................3-42
Radio with CD..............................................3-45
Radio with Cassette and CD..........................3-49
Radio with Six-Disc CD.................................3-60
Rear Seat Audio (RSA).................................3-71
Theft-Deterrent Feature (Non-RDS Radios).......3-73
Theft-Deterrent Feature (RDS Radios).............3-73
Understanding Radio Reception......................3-74
Care of Your Cassette Tape Player.................3-74
Care of Your CDs.........................................3-76
Care of Your CD Player................................3-76
Fixed Mast Antenna......................................3-76
Chime Level Adjustment................................3-76
Section 3 Instrument Panel
3-1
2003 - Savana OM

If your vehicle has air conditioning, your heating/air
conditioning controls will look like this:
On hot days, open the windows to let hot inside air
escape; then close them. This helps to reduce the time
it takes for your vehicle to cool down. It also helps
the system to operate more efficiently.
(Temperature Control):Turn the center knob clockwise
or counterclockwise to increase or decrease the
temperature inside your vehicle.
A/C (Air Conditioning):This setting will begin to cool
and dehumidify the air inside of your vehicle.
MAX A/C (Maximum Air Conditioning):Turn the right
knob to MAX A/C for maximum cooling. This setting
cools the air the fastest, by recirculating the inside air.Rear Heating System
Your vehicle may have an optional rear heating system
that allows you to adjust the amount of airflowing into
the rear of the vehicle, from the front-seating area.
This feature works with the main climate-control system
in your vehicle.
AUX (Auxiliary Heating System):The thumbwheel for
this system is located to the right of the audio system.
9(Fan):Turn the thumbwheel up or down to increase
or decrease the amount of heated air sent to the
rear-seating area.
9(Off):Turn the thumbwheel to this position to turn
off the rear heating system.
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2003 - Savana OM

Rear Air Conditioning and
Heating System
Your vehicle may have a rear heating and
air-conditioning system. This system regulates the
temperature, the fan speed and the air delivery for
the rear-seat passengers only. It also works with the
main climate-control system in your vehicle.
Use this control panel when you would like to maintain
a separate temperature setting. Adjust the direction
of the airflow or adjust the fan speed for the rear-seat
passenger(s).The rear control panel for this system is located in the
second row behind the driver in the rear of your vehicle.
A rear-seat passenger can use this control panel to
personally adjust the temperature, the direction of the
airflow and the fan speed for the rear-seating area.
The fan knob located on the front climate control panel
must be turned to REAR CNTL to allow a rear-seat
passenger to use the control panel in the rear-seating
area. Performing this action disables the front control
panel. To return control to this panel, move the fan knob
out of REAR CNTL. Front Climate-Control Panel
Rear Climate-Control Panel
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2003 - Savana OM

Directing the Airflow
Turn the center knob clockwise or counterclockwise
to change the direction of the airflow in the
rear-seating area.
To change the current mode, select one of the following:
D(Vent):Use this mode to direct air to the upper
outlets, with a little air directed to thefloor outlets.
2(Floor):Use this mode to direct most of the air to
thefloor outlets.
Selecting the Fan Speed
9
(Fan):Turn the left knob clockwise or
counterclockwise to HIGH, MED (Medium) or LOW to
increase or decrease the fan speed in the rear-seating
area. Turn the knob to OFF to turn off the fan.
Setting the Temperature
To increase or decrease the temperature for the rear
of the vehicle, use the right knob located on the
climate-control panel.
The air-conditioning system on the main climate-control
panel must be turned on to direct cooled air to the rear of
the vehicle. If it is not on, then the temperature in the rear
of the vehicle will remain at cabin temperature.
Be sure to keep the area under the front seats clear of
any objects so that the air inside of your vehicle can
circulate effectively.
For information on how to use the main climate-control
system, seeClimate Control System on page 3-17
listed previously in this section. For information
on ventilation, see“Outlet Adjustment”listed later
in this section.
3-20
2003 - Savana OM

Defogging and Defrosting
Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control is used properly.
There are two modes to clear fog or frost from your
windshield and side windows.
Use the defog mode to clear the windows of fog or
moisture and warm the passengers. Use the defrost
mode to remove fog or frost from the windshield more
quickly. For best results, clear all snow and ice from the
windshield before defrosting.
Turn the knob on the right of the climate control panel
to select the defog or defrost mode.
-(Blend):With this setting, the outside air comes out
of both thefloor and defroster outlets. Adjust the
temperature knob for warmer or cooler air. The air
conditioning compressor may operate in this setting to
dehumidify the air.
1(Defrost):This setting operates the defroster.
Most of the air comes out near the windshield, with
some going to thefloor outlets and front side windows.
The air conditioning compressor may operate in this
setting to dehumidify the air.
The blend setting is useful for cold weather with a large
number of passengers or very humid conditions to
help keep the windshield clear. Use defrost to remove
fog or ice from the windshield quickly in extremely
cold conditions. The temperature knob should be in the
red area and the fan control toward high. Do not
drive the vehicle until all the windows are clear.
3-21
2003 - Savana OM

Fuse Usage
1 Radio Battery
2 Powertrain Control Module Battery
3 Left Rear Turn Lamp
4 Right Rear Turn Lamp
5 Backup Lamps Trailer Wiring
6 Ignition 0
7 Stop Lamp
8 Right Rear Defogger/Heated Mirror
9Right Daytime Running Lamp/
Turn Signal
10Left Daytime Running Lamp/
Turn Signal
11 Truck Body Control Module 4
12 Fuel Pump
13 Trailer
14 Flasher
15 Horn
16 Truck Body Control Module 3
17 Trailer Stop/Turn Signal
18 Truck Body Control Module 2
19 Truck Body Control ModuleFuse Usage
20 Remote Function Actuator
21 Engine 2
22 Ignition E
23 Engine 1
24Truck Body Control Module
Ignition 1
25 Spare
26 RPA/Inside Rearview Mirror
27 Crankcase
28Brake Transmission Shift
Interlock System
29 Auxiliary Power Outlets
30 Cigarette Lighter
31 Instrument Panel Cluster
32 Air Conditioning
36 Vehicle Back Up
37Supplemental Inflatable
Restraint System
38 Powertrain Control Module Ignition 1
39 Oxygen Sensor B
40 Oxygen Sensor A
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2003 - Savana OM

Fuse Usage
41 Windshield Wipers
42 Right Headlamp—Low Beam
43 Left Headlamp—Low Beam
44 Left Headlamp—High Beam
45 Right Headlamp—High Beam
46Truck Body Control
Module-Accessory
47 Front Windshield Wiper
48 Anti-Lock Brakes
49 Ignition A
50 Trailer
51 Climate Control Blower
52 Ignition B
63 Spare
64 SpareFuse Usage
Relay Usage
53 Windshield Wiper
54 Air Conditioning
55 Spare
56 Headlamp—High Beam
57 Fuel Pump
58 Headlamp—Low Beam
59 Horn
61 Starter
62 Spare
Circuit Breaker Usage
60 Power Seat
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2003 - Savana OM

ApplicationCapacities
QTY Without
Rear HeaterQTY With
Rear Heater
Fuel Tank
Standard Tank (Passenger and Cargo) 31.0 gallons 117.3 L
Standard Tank (Cab and Chassis) 35.0 gallons 132.5 L
Optional Tank* (Cab and Chassis) 55.0 gallons 208.1 L
* 159 inch wheelbase or 177 inch wheel base only
Air Conditioning Refrigerant Capacity
Air Conditioning Refrigerant R-134a (Front) 1.8 lbs (0.81 kg)
Air Conditioning Refrigerant R-134a (Front and Rear) 3.1 lbs (1.41 kg)
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2003 - Savana OM