1994 CHEVROLET SUBURBAN instrument panel

Function Lever
The upper lever on the control panel can be moved to three different heating
functions.
0 Vent (Left): Air comes out at the vents on your instrument panel and at
your front side windows.
a heat setting, is best for cold weather.
0 Defrost (Right): This setting operates the defroster. Air comes out near
the bottom of the windshield and at your front side windows. Use this
setting, along with
a heat setting, when you get fog or ice on the
windshield.
0 Heater (Center): Air comes out near the floor. This setting, along with
Placing the lever between positions sends air out both vents.
Temperature Lever
The lower lever on the control panel lets you select the temperature of the
air flowing into the passenger area
of your vehicle. Move the lever right
toward
(+) for warmer air. Move the lever left toward (-) for cooler air.
Fan Control Knob
The knob on the right side of the heating system control panel controls the
fan speed. The knob has four speed positions. To increase the air flow, turn
the knob toward (+). To decrease the air flow, turn it toward (-).
Electronic Heating/Air Conditioning System
If your vehicle has air conditioning, your heating/air conditioning system
will
look like this.
3-5
ProCarManuals.com

When you first turn on your vehicle’s air conditioning, open the windows to
clear the vehicle
of hot air. Using the MAX button can also help. See
“MAX Button” in this section for more information.
.‘
s
...... Lj”. . ..-. .....
‘I ,OFF
..... .. ... : .
Function Display
Your system has a lighted display showing each system when it is operating.
During normal operation, all the lights won’t come on
at the same time.
Only the ones displaying the current settings will light.
Temperature Selector Bar
The bar under your system display lets you select the temperature of the air
flowing into the passenger area
of your vehicle. Press COLD for cooler air
and press HOT for warmer air. Release the bar when the system reaches the
temperature you want. The temperature is shown on the display by the
arrow moving between
C and H.
Air Controls (8L END)
The two buttons to the right of the system display control the air flow. You
can blend
the air flow to suit your needs. The amount of blending is shown
on the display by an arrow moving between the figure’s feet (floor air flow)
and head (vent air flow).
Left Button
Vent (Top) : Press the top of this button and the air flow will come through
the instrument panel vents.
Heater (Bottom) : Press the bottom of this button and the air flow will
come through the floor outlet.
3-6
ProCarManuals.com

The air flow can be blended between the two positions. To blend between
positions press the side
of the button showing the area where you would like
more air flow. The system will automatically begin to blend toward the
position chosen.
To stop the system between positions, just press the SAME
side of the button again.
Right Button
Defrost (Top) : This setting operates the defroster. Air comes out near the
bottom of the windshield and at your front side windows. Use this setting,
along with a heat setting, when you get fog or ice on the windshield.
Heater (Bottom) : Press the bottom of this button and air comes out near
the floor. This setting, along
with a heat setting, is best for passenger
comfort in cold weather.
The air flow can be blended between the two positions.
To blend between
positions press the side of the button showing the area where
you would like
more air
flow. The system will automatically begin to blend toward the
position chosen. To stop the system between positions, just press
the SAME
side of the button again.
A/C Button
Press the button marked A/C to turn your air conditioner on and off. The
A/C symbol will light on your display and air will come out of your
instrument panel vents. The fan will automatically be set on
LOW .
When you press the A/C button to turn the air conditioner off, the system
will operate in the vent mode. When you turn the air conditioner back
on,
the system will operate in the mode that you last selected unless the OFF
button was pressed.
MAX Button
If you press the MAX button, the air in your vehicle will be recirculated.
With the air conditioner on,
MAX will give you maximum cooling. It can
also be used
in all modes to help keep dust out of your vehicle. When MAX
is selected, REC will light on your display.
If your air conditioner develops high system pressure, it will automatically
go into the
MAX mode and REC will light on your display. The A/C
system will remain in the MAX mode, even if you press the MAX button,
until system pressure returns to a normal level.
3-7 ProCarManuals.com

To operate the rear air conditioning system, the front air conditioning
system must be
on. With the front air conditioning system off, the rear
system controls can be used to circulate air in the rear of the vehicle.
To operate the rear system using the front control, just turn the knob to the
blower position you want.
To use the rear control, first turn the front control knob to REAR CNTL.
Then, the rear control can be used to increase and decrease the air flow.
Rear Heater (Without Rear Air Conditioning)
If you have a rear
heater (without rear
air conditioning), the
control switch
is
located on the
instrument panel.
To increase and decrease the flow of heated air to the rear floor vents, move
the switch with the fan symbol
on it to the blower speed you want.
Move the switch all the way to the left position to turn the rear blower off,
and
each position to the right increases the flow of heated air.
Move
the switch all the way to the right position to turn the blower on high,
providing maximum flow of heated air.
3-9
ProCarManuals.com

Rear Window Defogger
You can tell if your vehicle has this option by looking at the rear window. If
you see lines running across the glass, you have it. These are the wire-like
elements which heat your window.
1 NOTICE:
Scraping the inside of your rear window could cut and damage
the defogger. Your warranty would
not cover this damage. And,
don't
put decals there, you might have to scrape them off.
For best results, clear the window of as much snow or ice as possible first.
To turn on the rear
window defogger, find
the switch marked
REAR DEFOG on
your instrument panel,
just below the heater
system.
Press the right side of
the switch, with the defog symbol on it, until the light
in the switch comes on, then release it.
The rear window defogger will only work if the ignition switch is turned to
RUN.
You can turn the defogger off at any time by pressing the left, lighted side of
the switch. The defogger will
shut itself off after several minutes, so that the
glass does not get too hot. If the defogger shuts off, and the window still
isn't clear, turn the defogger
on again.
3-11
ProCarManuals.com

Making Turns
When you’re turning with a trailer, make wider turns than normal. Do this
so your trailer won’t strike soft shoulders, curbs, road signs, trees, or other
objects. Avoid jerky or sudden maneuvers. Signal well
in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have a different turn signal
flasher and extra wiring, The green arrows on your instrument panel will
flash whenever you signal a turn or lane change. Properly hooked up, the
trailer lights will also flash, telling other drivers you’re about to turn,
change lanes or stop.
When towing a trailer,
the green arrows on your instrument panel will flash
for turns even if the bulbs on the trailer are burned out. Thus, you may think
drivers behind you are seeing your signal when they are not. It’s important
to check occasionally
to be sure the trailer bulbs are still working.
Driving On Grades
Reduce speed and shift to a lower gear before you start down a long or
steep downgrade. If
you don’t shift down, you might have to use your
brakes
so much that they would get hot and no longer work well.
On
a long uphill grade, shift down and reduce your speed to around 45 mph
(70 kdh) to reduce the possibility of engine and transmission overheating.
If you have an automatic transmission, you should use “D” (or, as you need
to, a lower gear) when towing
a trailer. Operating your vehicle in “D” when
towing a trailer will minimize heat buildup and extend
the life of your
transmission.
If
you have a manual transmission and you are towing a trailer, it’s better
not
to use fifth gear. Just drive in fourth gear (or, as you need to, a lower
gear).
Parking on Hills
You really should not park your vehicle, with a trailer attached, on a hill. If
something goes wrong, your rig could start to move. People can be injured,
and both your vehicle and the trailer can be damaged.
But
if you ever have to park your rig on a hill, here’s how to do it:
1. Apply your regular brakes, but don’t shift into “P’ (Park) yet, or in gear
for a manual transmission.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, release the regular brakes until the
chocks absorb
the load.
4-42
ProCarManuals.com

Towing From the Rear
Engine Overheating
You will find a coolant temperature gage on your vehicle instrument panel.
If you have a diesel engine, you will also find a low coolant light on your
instrument panel.
5-10 ProCarManuals.com

Power Windows and Other Power Options
Circuit breakers in the fuse panel protect the power windows and other
power accessories. When the current load is too heavy, the circuit breaker
opens and closes. This protects the circuit until the current load returns to
normal or the problem is fixed
.
Trailer Wiring Harness
The optional seven-wire trailer wiring harness is protected by an in-line
fuse in the battery feed wire. This fuse is near the junction block. See
“Trailer Wiring Harness” in the Index for more information.
Fuse Block
The fuse block is
behind an access door
at the bottom
of the
instrument panel, next
to the parking brake
release lever.
You can remove fuses
with a fuse extractor,
if you have one.
To remove fuses if you don’t have one, hold the end of the fuse between
your thumb and index finger and pull straight out.
Be sure to use the correct fuse. If
you ever have a problem on the road and
don’t have a spare fuse, you can “borrow” one of the correct value. Just pick
6-57
ProCarManuals.com