Your vehicle has one
double-sided key for the
ignition and all door locks.
If you ever lose your key, your dealer will be able to
assist you with obtaining a new one.
Notice:If you ever lock your keys in your vehicle,
you may have to damage the vehicle to get in.
Be sure you have spare keys.
If you ever do get locked out of your vehicle, call GM
Roadside Assistance Center. SeeRoadside Assistance
Program on page 7-4.Remote Keyless Entry System
If equipped, the keyless entry system operates on a
radio frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modifications to this system by other than
an authorized service facility could void authorization to
use this equipment.
2-3
Ignition Positions
With your key in the ignition switch, you can turn it to
five different positions.
A (ACCESSORY):This position allows you to use
things like the radio, power windows and the windshield
wipers when the engine is off. To get into ACCESSORY,
push in the key and turn it toward you. Your steering
wheel will remain locked, just as it was before you
inserted the key.
B (LOCK):This position locks your ignition, steering
wheel and transmission. It’s a theft-deterrent feature.
You will only be able to remove your key when the
ignition is turned to LOCK.C (OFF):This position lets you turn off the engine but
still turn the steering wheel. It doesn’t lock the
steering wheel like LOCK. Use OFF if you must have
your vehicle in motion while the engine is off (for
example, if your vehicle is being pushed).
D (RUN):This is the position for driving.
E (START):This position starts your engine.
Engine Starter Over-Crank Protection
Your vehicle may have an engine starter over-crank
protection system. If the starter motor overheats
and shuts off due to over-cranking, the motor must cool
down before it will reset and allow starter operation.
It can take up to six minutes before the starter will
work again.
Starting Your Gasoline Engine
Engines start differently. The 8th digit of your Vehicle
Identification Number (VIN) shows the code letter
for your engine. SeeVehicle Identi cation Number (VIN)
on page 5-85. Follow the proper steps to start the
engine.
To start a diesel engine, seeStarting Your Diesel
Engine on page 2-14.
2-12
Air Brake
{CAUTION:
When the yellow SYSTEM PARK and the red
TRAILER AIR SUPPLY knobs are both pushed
in, your rig will be free to move. It could strike
someone or something. When both of these
knobs are pushed in, hold the regular brake
pedal down to keep your rig from moving.
If your vehicle has air
brakes, you will have this
parking brake. It is
located above the radio in
the instrument panel.
Pulling it out applies the parking brake. The park brake
light will come on when the air parking brake is
applied.Vehicles built for use as tractors or towing vehicles have
two air brake controls. They look like this:
To charge a trailer’s air brake system do the following:
1. Move your tractor into the proper position.
2. Apply the parking brake by pulling the yellow
parking brake knob out.
3. Hook up the trailer air system properly.
4. Get into the tractor.
5. Push and hold down the regular brake pedal.
6. Push in both the yellow parking brake and the red
trailer air supply knobs. This will charge your
trailer’s air system.
2-35
Low Washer Fluid Warning Light.....................3-42
Check Gages Warning Light...........................3-42
Fuel Gage...................................................3-42
Water in Fuel Warning Light...........................3-43
Air Filter Restriction Indicator..........................3-44
Air Pressure Gage........................................3-44
Hourmeter Gage...........................................3-45
Audio System(s).............................................3-45
Setting the Time...........................................3-45
AM-FM Radio...............................................3-46Radio with Cassette......................................3-48
Radio with CD..............................................3-53
Theft-Deterrent Feature (Non-RDS Radios).......3-57
Radio Reception...........................................3-57
Care of Your Cassette Tape Player.................3-57
Care of Your CDs.........................................3-59
Care of Your CD Player................................3-59
Fixed Mast Antenna......................................3-59
Chime Level Adjustment................................3-59
Section 3 Instrument Panel
3-2
Interior Lamps
Instrument Panel Brightness Control
This feature controls the brightness of the instrument
panel lights.
The thumbwheel for this feature is located to the right of
the exterior lamp control.
Turn the thumbwheel up to brighten the lights. When
the thumbwheel is moved to the first position, the radio
display and transmission selection display will go to
full intensity. The instrument panel cluster will also be
dimly lit. Moving the thumbwheel up to the next position
will activate the interior dome lamps.
Dome Lamps
The dome lamps will come on when you open a door.
You can also turn the dome lamps on by moving
the thumbwheel, located to the right of the exterior lamp
control, all the way up to the second position. In this
position, the dome lamps will remain on whether a door
is open or closed.
You can use the dome override button to set the dome
lamps to automatically come on when a door is
open, or to remain off.The dome override button is located below the exterior
lamp control.
If the dome override button is pushed in, the dome
lamps will not come on. Use this feature when you want
to leave your door(s) open for an extended period of
time and do not want to run the battery down.
If the dome override button is in the out position, the
interior lamps will work as usual.
3-15
This switchbank is located in the center of the instrument
panel.
e(Marker Lamp Defeat Switch):See “Marker Lamp
Defeat Switch” underExterior Lamps on page 3-13.
j(Manual High Idle Switch):See “Manual High Idle
System” underStarting Your Diesel Engine on
page 2-14.
i(Traction Control Switch):SeeTraction Control
System (TCS) on page 4-11.
f(Outside Heated Mirror Switch):SeeOutside
Heated Mirrors on page 2-41.
g(Power Take Off Switch):SeePower Take-Off
(PTO) on page 4-36.
h(Rear Air Suspension Dump Control
Switch):See “Rear Air Suspension Dump Control”
underTwo-Speed Rear Axle Electric Shift Control
on page 2-26.
k(Rear Axle Shift Control Switch):See “Air Shift
Control” (Automatic Transmission) underTwo-Speed
Rear Axle Electric Shift Control on page 2-26.
Exhaust Brake Switch:SeeDiesel Engine Exhaust
Brake on page 2-25.
l(Differential Lock Control Switch):SeeRear
Axle Differential Lock Control on page 4-10.
cd(Air Bag Off Switch):SeeAir Bag Off Switch
on page 1-55.
If your vehicle does not have some of the features
controlled by these switches, there will be a blank switch
marker in its place.
Accessory Power Outlets
With accessory power outlets, you can plug in auxiliary
electrical equipment such as a cellular telephone or
CB radio.
The accessory power outlets are located on the
passenger’s side of the instrument panel.
To use an outlet, pull the cover down. When not using
it, always cover the outlet with the protective cap.
These circuits are protected by a fuse and have
maximum current levels.
Notice:Leaving electrical equipment on for
extended periods will drain the battery. Always turn
off electrical equipment when not in use and do
not plug in equipment that exceeds the maximum
amperage rating.
3-17
Charging System Light
The charging system light
may be located in the
instrument panel cluster, or
with the auxiliary warning
lights in the center of
the instrument panel.
It should come on briefly when you turn on the ignition,
before the engine is running, as a check to show
that it is working.
If it stays on, or comes on while you are driving, have
your vehicle checked right away. You could have a loose
generator drive belt or some other problem.
Driving while this light is on will drain your battery. If you
must drive a short distance with the light on, turn off
your radio and other accessories. Sustained driving with
a generator failure could result in a lack of back-up
braking if the engine quits or the power steering pump
should fail.
Voltmeter Gage
When your engine is
running, the voltmeter
gage shows the charging
system voltage.
Readings in either warning zone indicate a possible
problem in the electrical system.
Readings in the low warning zone may occur when a
large number of electrical accessories are operating in
the vehicle and the engine is left at an idle for an
extended period. This condition is normal since the
charging system may not be able to provide full power
at engine idle. As engine speeds are increased,
this condition should correct itself because higher
engine speeds allow the charging system to create
maximum power.
You can only drive a short time on the battery. Be sure
to shut off the radio, the fan or any unnecessary
accessories and have the system serviced.
3-30
Hourmeter Gage
The instrument panel cluster displays the accumulated
engine run time hours using the reconfigurable
odometer VF display. The engine run time hours
displays only when the ignition is in the OFF or ACC
position and the trip reset switch is pressed for
about four seconds.
When the ignition is in the OFF or ACC position, the
instrument panel cluster displays the engine
accumulated hours for up to 30 seconds. The value of
the accumulated hours does not change when the
battery is disconnected.
The hourmeter resets to 0.0 when 10,000 hours are
accumulated. The instrument panel cluster begins
to reaccumulate the engine run time hours from 0.0
hours.
Audio System(s)
Notice:Before you add any sound equipment to
your vehicle – like a tape player, CB radio, mobile
telephone or two-way radio – be sure you can
add what you want. If you can, it’s very important to
do it properly. Added sound equipment may
interfere with the operation of your vehicle’s engine,
radio or other systems, and even damage them.Your vehicle’s systems may interfere with the
operation of sound equipment that has been added
improperly.
So, before adding sound equipment, check with
your dealer and be sure to check federal rules
covering mobile radio and telephone units.
Your audio system has been designed to operate easily
and to give years of listening pleasure. You will get
the most enjoyment out of it if you acquaint yourself with
it first. Figure out which radio you have in your vehicle,
find out what your audio system can do, and how to
operate all of its controls to be sure you are getting
the most out of the advanced engineering that went
into it.
Setting the Time
Press and hold the HR or MIN arrow for two seconds.
Then press the HR (down) arrow until the correct
hour appears on the display. Press and hold the
MIN (up) arrow until the correct minute appears on
the display. The time may be set with the ignition on
or off.
3-45