Page 338 of 734

▫Brake/Transmission Shift Interlock System . . .354
▫ Eight–Speed Automatic Transmission — If
Equipped .......................... .354
▫ Six–Speed Automatic Transmission If Equipped —
1500 Models Only .....................361
▫ Six–Speed Automatic Transmission (5.7L Engine)
— 2500/3500 Models Only ..............373
FOUR-WHEEL DRIVE OPERATION — IF
EQUIPPED .......................... .384
▫ Manually Shifted Transfer Case –
If Equipped ......................... .384
▫ Electronically Shifted Transfer Case (Four-Position
Switch) – If Equipped ..................388
▫ Electronically Shifted Transfer Case (Five-Position
Switch) – If Equipped ..................394 ▫
Electronically Shifted Transfer Case (Five-Position
Switch) – If Equipped ..................398
AIR SUSPENSION SYSTEM — IF EQUIPPED . .406
▫ Description ......................... .406
▫ Air Suspension Modes ..................410
▫ Electronic Vehicle Information Center (EVIC)
Display Messages .....................411
▫ Operation .......................... .412
AXLE LOCKER SYSTEM (2500 MODELS ONLY) —
IF EQUIPPED ......................... .413
STABILIZER/SWAY BAR SYSTEM — POWER
WAGON ONLY ....................... .416
SAFE OFF-ROAD DRIVING — POWER WAGON
ONLY.............................. .418
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To Turn Off The Engine Using ENGINE
START/STOP Button
1. Place the shift lever in PARK, then press and releasethe ENGINE START/STOP button.
2. The ignition switch will return to the OFF position.
3. If the shift lever is not in PARK, the ENGINE START/ STOP button must be held for two seconds and vehicle
speed must be above 5 mph (8 km/h) before the
engine will shut off. The ignition switch position will
remain in the ACC position until the shift lever is in
PARK and the button is pressed twice to the OFF
position. If the shift lever is not in PARK and the
ENGINE START/STOP button is pressed once, the
EVIC (if equipped) will display a “Vehicle Not In
Park” message and the engine will remain running.
Never leave a vehicle out of the PARK position, or it
could roll. NOTE:
If the ignition switch is left in the ACC or RUN
(engine not running) position and the transmission is in
PARK, the system will automatically time out after 30
minutes of inactivity and the ignition will switch to the
OFF position.
ENGINE START/STOP Button Functions – With
Driver ’s Foot OFF The Brake Pedal (In PARK Or
NEUTRAL Position)
The ENGINE START/STOP button operates similar to an
ignition switch. It has four positions, OFF, ACC, RUN
and START. To change the ignition switch positions
without starting the vehicle and use the accessories
follow these steps.
1. Starting with the ignition switch in the OFF position:
2. Press the ENGINE START/STOP button once to change the ignition switch to the ACC position (EVIC
displays “ACC”),
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3. Press the ENGINE START/STOP button a second timeto change the ignition switch to the RUN position
(EVIC displays “RUN”),
4. Press the ENGINE START/STOP button a third time to return the ignition switch to the OFF position (EVIC
displays “OFF”).
Extreme Cold Weather (Below –20°F Or 29°C)
To ensure reliable starting at these temperatures, use of
an externally powered electric engine block heater (avail-
able from your authorized dealer) is recommended.
If Engine Fails To Start
If the engine fails to start after you have followed the
“Normal Starting” procedure, it may be flooded. Push
the accelerator pedal all the way to the floor and hold it
there while cranking the engine. This should clear any
excess fuel in case the engine is flooded.
CAUTION!
To prevent damage to the starter, do not crank the
engine for more than 15 seconds at a time. Wait 10 to
15 seconds before trying again.
WARNING!
•Never pour fuel or other flammable liquids into
the throttle body air inlet opening in an attempt to
start the vehicle. This could result in a flash fire
causing serious personal injury.
• Do not attempt to push or tow your vehicle to get it
started. Vehicles equipped with an automatic trans-
mission cannot be started this way. Unburned fuel
could enter the catalytic converter and once the
engine has started, ignite and damage the converter
and vehicle.
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To Activate The Autostop Mode, The Following Must
Occur:
1. The system must be in STOP/START READY state. ASTOP/START READY message will be displayed in
the Electronic Vehicle Information Center (EVIC)
within the Stop/Start section. Refer to “Electronic
Vehicle Information Center (EVIC)” in “Understand-
ing Your Instrument Panel” for further information.
2. The vehicle must be completely stopped.
3. The transmission Gear Selector must be in Drive and the brake pedal depressed.
The engine will shut down, the tachometer will move to
the zero position and the stop/start telltale will illumi-
nate indicating you are in an Autostop. While in an Autostop, the Climate Controls system may automati-
cally adjust airflow to maintain cabin comfort. Customer
settings will be maintained upon return to an engine
running condition.
Possible Reasons The Engine Does Not AUTO
STOP
Prior to engine shut down, the system will check many
safety and comfort conditions to see if they are fulfilled.
In following situations the engine will not stop:
•
Driver ’s seat belt is not buckled
• Driver ’s door is not closed
• Outside temperature is less than 1°F (–17°C) or greater
than 104°F (40°C)
• The vehicle is on a steep grade
• Cabin heating or cooling is in process and an accept-
able cabin temperature has not been achieved
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•Low brake vacuum e.g. after several brake pedal
applications
• STOP/START OFF switch is pressed
• 4WD system is put into 4LO mode
• The emissions system requires it
• A STOP/START system error occurs
Conditions that force an automatic shift to PARK while
in Autostop mode:
The Engine Will Not Start Automatically and the Trans-
mission will be placed in PARK if:
• The driver door is open and brake pedal released
• The driver door is open and the driver seat belt is
unbuckled •
The engine hood has been opened
• A STOP/START system error occurs
The engine may then be restarted by moving the trans-
mission shift selector out of PARK (e.g. to DRIVE) or, in
some cases, only by a KEY START. The Electronic Vehicle
Information Center (EVIC) will display a SHIFT OUT OF
PARK message, or a STOP/START KEY START RE-
QUIRED message, to indicate which action is required.
Refer to “Electronic Vehicle Information Center (EVIC)”
in “Understanding Your Instrument Panel” for further
information.
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In 8-speed vehicles, the brake pedal must also be pressed
to shift from NEUTRAL into DRIVE or REVERSE when
the vehicle is stopped or moving at low speeds.
Eight–Speed Automatic Transmission — If
Equipped
Your vehicle is equipped with a state of the art, fuel
efficient eight-speed transmission. The electronic shifter
control is located on the instrument panel. The transmis-
sion gear (PRND) is displayed both above the shifter
control and in the Electronic Vehicle Information Center
(EVIC). To select a gear range, simply rotate the shifter
control. You must press the brake pedal to shift the
transmission out of PARK (see Brake/Transmission Shift
Interlock System). You must also press the brake pedal to
shift from NEUTRAL into DRIVE or REVERSE, when the
vehicle is stopped or moving at low speeds. To shift past
multiple gear ranges at once (such as Park to Drive),simply rotate the shifter control to the appropriate detent.
Select the DRIVE range for normal driving.
The electronically-controlled transmission provides a
precise shift schedule. The transmission electronics are
self-calibrating; therefore, the first few shifts on a new
vehicle may be somewhat abrupt. This is a normal
condition, and precision shifts will develop within a few
hundred miles (kilometers).
Only shift from DRIVE to PARK or REVERSE when the
accelerator pedal is released and the vehicle is stopped.
Be sure to keep your foot on the brake pedal when
shifting between these gears.
The transmission shifter control has only PARK, RE-
VERSE, NEUTRAL, and DRIVE positions. Manual down-
shifts can be made using the Electronic Range Select
(ERS) switches (described later in this section). Pressing
the GEAR-/GEAR+ switches (on the steering wheel)
while in the DRIVE position will select the highest
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available transmission gear, and will display that gear in
the instrument cluster as 8, 7, 6, 5, 4, 3, 2, 1.
Gear Ranges
DO NOT race the engine when shifting from PARK or
NEUTRAL into another gear range.NOTE:
After selecting any gear range, wait a moment to
allow the selected gear to engage before accelerating.
This is especially important when the engine is cold.
PARK
This range supplements the parking brake by locking the
transmission. The engine can be started in this range.
Never attempt to use PARK while the vehicle is in
motion. Apply the parking brake when leaving the
vehicle in this range.
When parking on a level surface, you may shift the
transmission into PARK first, and then apply the parking
brake.
When parking on a hill, apply the parking brake before
shifting the transmission to PARK. As an added precau-
tion, turn the front wheels toward the curb on a downhill
grade and away from the curb on an uphill grade.
Electronic Transmission Shifter
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CAUTION!
•DO NOT race the engine when shifting from
PARK or NEUTRAL into another gear range, as this
can damage the drivetrain.
•
Before moving the shift lever out of PARK, you must
start the engine, and also press the brake pedal.
Otherwise, damage to the shift lever could result.
The following indicator should be used to ensure that
you have engaged the transmission into the PARK posi-
tion:
• With brake pedal released, look at the transmission
gear position display and verify that it indicates the
PARK position.
REVERSE
This range is for moving the vehicle backward. Shift into
REVERSE only after the vehicle has come to a complete stop.
NEUTRAL
Use this range when the vehicle is standing for prolonged
periods with the engine running. The engine may be
started in this range. Apply the parking brake and shift
the transmission into PARK if you must leave the vehicle.
WARNING!
Do not coast in NEUTRAL and never turn off the
ignition to coast down a hill. These are unsafe
practices that limit your response to changing traffic
or road conditions. You might lose control of the
vehicle and have a collision.
CAUTION!
Towing the vehicle, coasting, or driving for any other
reason with the transmission in NEUTRAL can cause
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