Page 9 of 208
IT
R
TE
POWER POINT
OFFA/CMAX
A/C
SCAN
BASS TREB BAL FADE
SIDE
EJ
REW FF1 - 2TAPE
AMS
VOL - PUSH ON
SEEK
TUNE
AM
FMCLK
12 3456
FM1ST
PARKINGBRAKEPULL TO
RELEASEAPPLY
PUSH TO
Air pressure gauge*
(pg. 19)
Auxiliary power point
(pg. 21) Electronic sound system
(pg. 26)
Climate control system
(pg. 21)
Parking brake*
(air brake system)
(pg. 87)
*if equipped
Instrumentation
9
Page 10 of 208

WARNING LIGHTS AND CHIMES
Air clean warning (if equipped)
Illuminates when the ignition is
turned to the ON position and the
engine is off. The light also
illuminates when the air system is
restricted (dirty, clogged).
Brake reserve system warning (if equipped)
Illuminates to indicate normal
Hydromax booster reserve system
activation when the engine is OFF
and the service brake pedal is
applied, or when the ignition is in
the ON or START position.
This light may also illuminate momentarily if the engine is running and
the driver turns the steering wheel fully in one direction while braking.
If the light remains on while the engine is running, this indicates
inadequate hydraulic booster pressure or reserve pump system failure.
Stop the vehicle safely as soon as possible and seek service immediately.
Charging system
Illuminates when the ignition is
turned to the ON position and the
engine is off. The light also
illuminates when there is no
alternator output, or an over voltage
condition requiring electrical system service.
BRAKE
0
000000000
MPH20km/h
406080
100
120
140
160
010 20304050
60
70
80
90
100
TRAILERWATER
IN
FUELWAIT
TO
START
STOP
ENGINE
ENGINE
PROTECT
AIR
CLEAN
CHECK
TRANSRANGE
INHIBITSERVICE
ENGINE
SOONCRUISE
LEF
H
RPM1000
DIESEL FUEL ONLY
X012
3
4PRN 218C 18
H
D
BRAKEBRAKE
AIR
CLEAN
BRAKE
Instrumentation
10
Page 11 of 208

Parking brake warning (if equipped)
Momentarily illuminates when the
ignition is turned to the ON position
and the engine is off.
If the warning lamp remains
illuminated after engine start up,
this indicates a system failure in the master cylinder of the brake system.
Stop the vehicle safely as soon as possible and seek service immediately.
If equipped with an air brake system, the warning light stays on until the
air pressure builds up to 414 kPa (60 psi). If the air pressure drops
below 414 kPa (60 psi) durning operation, the remaining brake system is
still operational but the stopping distance will be greater.
Parking brake warning
Momentarily illuminates when the
ignition is turned to the ON position
and the engine is off. If the brake
warning lamp does not illuminate at
this time, seek service immediately.
Also illuminates when the parking
brake is engaged.
Engine protect warning (Cummins engine only)
Illuminates when there is a fault in
the electronic subsystem but the
vehicle can be driven, and indicates
one of the following conditions:
•low oil pressure
•low coolant level
•high coolant temperature
•high intake manifold temperature
Refer to the Engine Operator’s Manual.
!
BRAKE
P
BRAKE
ENGINE
PROTECT
Instrumentation
11
Page 12 of 208

Stop engine (if equipped)
This light is used in conjunction
with the electronic engine control.
Refer to the Engine Operator’s
Manual for specific information
regarding this feature.
If the engine shuts down, it can be
restarted and operated for 30
seconds at a time or until the
problem is corrected. Refer toEngine shutdown systemin theStarting
chapter.
Drivers of electronically controlled engines should know the
extent of warning engine shutdown system before operating the
vehicle. This information can be obtained from your dealer.
Turn signal
Illuminates when the left or right
turn signal or the hazard lights are
turned on. If one or both of the
indicators stay on continuously or
flash faster, check for a burned-out
turn signal bulb. Refer toExterior bulbsin theMaintenance and care
chapter.
High beams
Illuminates when the high beam
headlamps are turned on.
Anti-lock brake system (ABS)
Momentarily illuminates when the
ignition is turned to the ON position
and the engine is off. If the light
remains on after the vehicle is
started, continues to flash or fails to
illuminate, have the system serviced immediately. With the ABS light on,
STOP
ENGINE
ABS
Instrumentation
12
Page 13 of 208

the anti-lock brake system is disabled and normal braking is still effective
unless the brake warning light also remains illuminated.
Wait to start
Indicates the air intake heater is in
operation and special starting
procedures are required. Refer to
theStartingchapter.
If equipped with an air
intake heater, DO NOT use
ether or any other starting fluids.
The use of starting fluids (ether)
in an engine equipped with an air
intake heater could result in
damage and/or personal injury.
Water in fuel (if equipped)
During refueling it is possible for
water-contaminated diesel fuel to be
pumped into your fuel tank. Your
vehicle fuel system is equipped with
a fuel filter/water separator to
remove water from the fuel. The
water in fuel indicator light
illuminates when the fuel
filter/water separator has a
significant quantity of water, or when the ignition key is switched to the
START position. If the light illuminates when the engine is running, stop
the vehicle as soon as safely possible, shut off the engine and drain the
filter bowl. Allowing water to stay in the system could result in extensive
damage to, or failure of, the fuel injection system.
To drain the fuel filter/water separator (refer toMaintenance and Care
section for procedure). Rotate the valve at the bottom of the filter
assembly allowing water to drain from the system. Close the valve upon
completion.
Do not drain water separator while engine is running. Fuel may
ignite if separator is drained while engine is running or vehicle is
moving.
WAIT
TO
START
WATER
IN
FUEL
Instrumentation
13
Page 14 of 208

Check trans (Allison automatic transmission)
The lamp will illuminate for several
seconds after the ignition is turned
to the ON position. Illumination of
this light indicates that a problem
has been detected and shifting may
be restricted. Depending upon the
severity of the problem, the
read-out digit on the shifter display
may be blank. Operation may
continue in order or reach service assistance. The ECU may not respond
to shift selector requests, since operating limitations are being placed on
the transmission, i.e. upshifts and downshifts may be restricted.
Direction changes will not occur.
Refer to theMaintenance and Carechapter.
Safety belt
Momentarily illuminates when the
ignition is turned to the ON position
to remind you to fasten your safety
belts. For more information, refer to
theSeating and safety restraints
chapter.
Service engine soon
TheService Engine Soonindicator
light illuminates when the ignition is
first turned to the ON position to
check the bulb. If it comes on after
the engine is started, one of the
engine’s control systems may be
malfunctioning. The light may illuminate without a driveability concern
being noted. The vehicle will usually be drivable and will not require
towing.
Temporary malfunctions may cause yourService Engine Soonlight to
illuminate. Examples are:
1. The vehicle has run out of fuel. (The engine may misfire or run
poorly.)
2. Poor fuel quality or water in the fuel.
CHECK
TRANS
SERVICE
ENGINE
SOON
Instrumentation
14
Page 15 of 208

These and other temporary malfunctions can be corrected by filling the
fuel tank with good quality fuel. After three driving cycles without these
or any other temporary malfunctions present, theService Engine Soon
light should turn off. (A driving cycle consists of a cold engine startup
followed by mixed city/highway driving.) No additional vehicle service is
required.
If theService Engine Soonlight remains on, have your vehicle serviced
at the first available opportunity.
Under engine misfire conditions, excessive exhaust temperatures
could damage the fuel system, interior floor coverings or other
vehicle components, possibly causing a fire.
Key-in-ignition warning chime
Sounds when the ignition key is left in the ignition in the OFF/LOCK or
ACC position and the driver’s door is opened.
Headlamps on warning chime
Sounds when the headlamps or parking lamps are on, the ignition is off
(and the key is not in the ignition) and the driver’s door is opened.
Safety belt warning chime
Sounds to remind you to fasten your safety belts.
For information on the safety belt warning chime, refer to theSeating
and safety restraintschapter.
Instrumentation
15
Page 16 of 208

GAUGES
Fuel gauge
Displays approximately how much
fuel is in the fuel tank (when the
key is in the ON position). The fuel
gauge may vary slightly when the
vehicle is in motion. The ignition
should be in the OFF position while
the vehicle is being refueled. When
the gauge first indicates empty,
there is a small amount of reserve
fuel in the tank. When refueling the
vehicle from an empty indication, the amount of fuel that can be added
will be less than the advertised capacity due to the reserve fuel.
Engine coolant temperature gauge
Indicates the temperature of the
engine coolant. At normal operating
temperature, the needle remains
within the normal area (the area
between the“H”and“C”). If it
enters the red section, the engine is
overheating. Stop the vehicle as
soon as safely possible, switch off
the engine immediately and let the
engine cool. Refer toEngine
coolantin theMaintenance and
carechapter.
BRAKE
0
000000000
MPH20km/h
406080
100
120
140
160
010 20304050
60
70
80
90
100
TRAILERWATER
IN
FUELWAIT
TO
START
STOP
ENGINE
ENGINE
PROTECT
AIR
CLEAN
CHECK
TRANSRANGE
INHIBITSERVICE
ENGINE
SOONCRUISE
LEF
H
RPM1000
DIESEL FUEL ONLY
X012
3
4PRN 218C 18
H
D
BRAKEBRAKE
EF
H
C
Instrumentation
16