Keys...............................................................2-2
Remote Keyless Entry System.........................2-3
Remote Keyless Entry System Operation...........2-4
Doors and Locks.............................................2-6
Door Locks....................................................2-6
Power Door Locks..........................................2-7
Windows.........................................................2-8
Manual Windows............................................2-8
Power Windows.............................................2-9
Sliding Rear Window.....................................2-10
Sun Visors...................................................2-10
Theft-Deterrent Systems..................................2-10
Starting and Operating Your Vehicle................2-11
New Vehicle Break-In....................................2-11
Ignition Positions..........................................2-12
Starting Your Gasoline Engine........................2-12
Starting Your Diesel Engine...........................2-14
Starting Your DURAMAX™ Diesel Engine........2-19Engine Checks Before Operating....................2-22
Engine Coolant Heater..................................2-23
Diesel Engine Exhaust Brake.........................2-25
Two-Speed Rear Axle Electric Shift Control......2-26
Automatic Transmission Operation...................2-28
Manual Transmission Operation......................2-30
Parking.......................................................2-33
Parking Over Things That Burn.......................2-37
Engine Exhaust............................................2-37
Running Your Engine While You Are Parked. . . .2-38
Mirrors...........................................................2-39
Manual Rearview Mirror.................................2-39
Outside Manual Mirrors..................................2-39
Outside Power Mirrors...................................2-40
Outside Convex Mirrors.................................2-40
Outside Heated Mirrors..................................2-41
Storage Areas................................................2-41
Center Console Storage Area.........................2-42
Section 2 Features and Controls
2-1
Automatic Transmission
Set the parking brake and move your shift lever to
NEUTRAL (N) or PARK (P) if so equipped. Your engine
won’t start in any other position – that’s a safety
feature.
Manual Transmission
Set the parking brake, shift to neutral and hold the
clutch pedal to the floor while starting the engine.
Starter Motor Operation
•The starter motor will disengage if you release the
key or the engine reaches a predetermined engine
speed.
•To prevent overheating, the starter motor will
disengage after continuously operating for
15 seconds. You must release the key from the
start position to re-engage the starter.
•The starter motor will not engage if the engine is
already running.
•The starter motor will disengage if, after two
seconds, the starter pinion gear does not engage
the flywheel or there is no engine rpm signal
from the engine speed sensor.
Starting Your Engine
1. Without pushing the accelerator pedal, turn your
ignition key to START. When the engine starts, let
go of the key. The idle speed will go down as
your engine gets warm.
2. If the engine doesn’t start in 10 seconds, push the
accelerator pedal all the way down and crank the
engine for five more seconds, unless it starts
sooner.
3. If your engine still won’t start (or starts but then
stops), it could be flooded with too much gasoline.
Wait 15 seconds to let the starter motor cool
down. Do Steps 1 through 3 again.
When the engine starts, let go of the key and the
accelerator pedal.
Notice:Your engine is designed to work with the
electronics in your vehicle. If you add electrical
parts or accessories, you could change the way the
engine operates. Before adding electrical equipment,
check with your dealer. If you do not, your engine
might not perform properly.
If you ever need to have your vehicle towed, see
Towing Your Vehicle on page 4-31.
2-13
Gasoline Engine Warm-Up
When you’ve started your engine, let it run for
20 or 30 seconds to warm up before you put a load on
the engine.
Drive at moderate speeds for the first few miles,
especially in cold weather. Running a cold engine at
high speed can damage it. SeeHigh Idle Systemunder
Starting Your Diesel Engine on page 2-14
Restarting the Gasoline Engine While
Moving (Automatic Transmission)
If you have to restart the engine while the vehicle is
moving, you’ll first have to shift the automatic
transmission to NEUTRAL (N). This safety feature
prevents starting the engine when the transmission is in
a drive gear.
Stopping the Gasoline Engine
Let your engine idle for a few seconds before turning it
off after you have finished driving your vehicle.
If you shift to NEUTRAL (N) or PARK (P), set the
parking brake.
If your vehicle has a two-speed axle, put the range
selector in LOW. To be sure the axle has shifted into
LOW, engage the clutch and transmission; the vehicle
may move slightly when you do this.While your engine is idling before you turn it off, you
can make a list of any operational or handling concerns
to give to responsible maintenance personnel so
they can handle them right away.
Moisture will condense in a fuel tank that is almost
empty if the engine has not run for a while, even just
overnight under some conditions. So, it’s always best to
refuel your vehicle at the end of each run.
Starting Your Diesel Engine
If you have a Caterpillar®diesel engine, also refer to
your Caterpillar®Diesel Engine Operation &
Maintenance Manual for starting procedure.
For vehicles with the DURAMAX™ diesel engine, also
seeStarting Your DURAMAX™ Diesel Engine on
page 2-19.
To make starting easier in cold weather (below 32°F or
0°C), the proper viscosity engine oil should be used.
SeeEngine Oil (Caterpillar
®Diesel Engine) on
page 5-20orEngine Oil (Gasoline Engine) on page 5-20
orEngine Oil (DURAMAX™ Diesel) on page 5-25. It’s
also best to heat the engine oil first. You can do this by
using an engine coolant heater.
If you ever need to have your vehicle towed, see
Towing Your Vehicle on page 4-31.
2-14
Restarting the Diesel Engine While
Moving (Automatic Transmission)
If you have to restart the engine while the vehicle is
moving, you’ll first have to shift the automatic
transmission to NEUTRAL (N). This safety feature
prevents starting the engine when the transmission is in
a drive gear.
Stopping the Diesel Engine
If you have a Caterpillar®diesel engine, see your
Caterpillar®Diesel Engine Operation & Maintenance
Manual.
1. Set the parking brake and shift to NEUTRAL (N) or
PARK (P).
2. Turn the ignition key to OFF.
If your vehicle has a two-speed axle, see
Two-Speed Rear Axle Electric Shift Control on
page 2-26.
Cold Weather Starting
(Caterpillar®Diesel)
Because the diesel engine uses compression ignition, it
is harder to start in cold weather than a gasoline
engine. The air intake heater and use of the proper
engine oil, optional engine coolant heaters and optional
ether injection systems help cold weather starting.
See the Caterpillar
®Diesel Engine Operation &
Maintenance Manual for more information.
Notice:Your diesel engine has an electric air
intake heater system which reduces white smoke
and helps start the engine in cold weather. Do
not spray starting uid into the air intake where it
can contact the heater elements.
If you do not have the GM Automatic Ether Injection
System, do not use starting uid or you could
damage your engine. If you have the GM system,
use only GM approved starting uid that has
been tested to establish compatibility with the air
inlet heater system.
2-15
Two-Speed Rear Axle Electric
Shift Control
If your vehicle is equipped with this feature, you’ll find a
label on the headliner above the windshield or in
another place near the driver that shows how to use it.
Be sure to follow the directions carefully.
Use the following directions based on the type of shift
control you have.
Manual Transmission
The rear axle shift control
switch for a manual
transmission is located on
the shift lever.
When the switch is up, the rear axle is in the high
range. Push the switch down to change to low range.The two-speed axle should be in low when you park the
vehicle. You’ll need to engage the transmission, even
move the vehicle a little, to be sure the axle is in the low
range. Then apply the parking brake, shift into
NEUTRAL and shut off the engine.
Also, always start the vehicle in motion with the
two-speed axle in the low range. To shift up from low to
high, do the following:
1. Move the switch up for the high range,
2. disengage the clutch, and
3. after a brief pause, engage the clutch and then
press down on the accelerator.
To shift down from high to low, do the following:
1. Move the switch down to low,
2. release the accelerator and then quickly apply
it again.
2-26
Air Shift Control (Automatic
Transmission)
The rear axle shift control
switch for an automatic
transmission is located in
the instrument panel
switchbank.
Press the bottom of the switch to get to the low range.
The switch indicator light will come on when the
vehicle is in low range. Press the top of the switch to
return to the high range.
The two-speed axle should be in low range when you
park the vehicle. You’ll need to engage the transmission,
even moving the vehicle a little, to be sure the axle is
in low range. Then shift into PARK (P), apply the parking
brake and shut off the engine.To shift up from low to high, press the top of the rear
axle shift control switch and press down on the
accelerator. When you shift the axle from high to low,
press the bottom of the switch, release the accelerator
and then quickly press it down again.
To operate off-road or under a heavy load, shift into low
range when the vehicle is standing still and then
operate the transmission normally.
On the highway, with the axle in low range and the
transmission in top gear, you may shift the axle to high
range by raising the switch and releasing the
accelerator momentarily. Reapply the accelerator after
you shift.
Under light load conditions, first shift the axle into the
high range with the vehicle at a standstill and then
operate the transmission normally.
Air Suspension
Your vehicle may be equipped with the Hendrickson
HAS Series single-axle air suspension which is designed
for single-axle on-highway use. The feature is available
in 19,000 lb. (8 618.3 kg), 21,000 lb. (9 525.4 kg)
and 23,000 lb. (10 432.6 kg) capacities for operations
which require extra cubic capacity and a reduced
deck height.
2-27
Rear Air Suspension Dump Control
If your vehicle is equipped with the Hendrickson HAS
Series single-axle air suspension, you have this control.
The air suspension dump control allows the operator
to lower the deck height approximately 4.5 inches
(11.5 cm) from the normal frame height.
The switch to deflate and
inflate the air suspension
is located in the instrument
panel switchbank.
Press the bottom of the switch to deflate the air
suspension and lower the deck height. Press the top of
the switch to return the suspension to normal deck
height.
An indicator light will come on and stay on whenever
the switch is in the dumped position.
Automatic Transmission Operation
We build vehicles with five and six-speed automatic
transmissions. This part of the manual covers the basics
of these. With some of the transmissions, you will find
another manual in your vehicle that goes into more
detail. On the headliner, in front of and above the driver,
or in some other place near the driver, you will see a
label that describes important operating facts about the
automatic transmission in your vehicle. Make sure
you follow the instructions on this label.
Be sure to keep your parking brake set until you are
ready to shift into DRIVE (D), and press the brake pedal
while shifting from NEUTRAL (N) or PARK (P) to a
drive gear.
All vehicles equipped with automatic transmissions can
be started in PARK (P), if equipped, or in NEUTRAL (N).
See the Allison
®Transmission Operator’s Manual in
your vehicle for more information about this.
2-28