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•Bi-Level Mode
Air comes from the instrument panel outlets
and floor outlets. A slight amount of air is
directed through the defrost and side window demis-
ter outlets.
NOTE: BI-LEVEL mode is designed under comfort con-
ditions to provide cooler air out of the panel outlets and
warmer air from the floor outlets.
• Floor Mode
Air comes from the floor outlets. A slight
amount of air is directed through the defrost
and side window demister outlets.
• Mix Mode
Air comes from the floor, defrost and side
window demist outlets. This mode works best
in cold or snowy conditions. 12. Climate Control OFF Button
Press and release this button to turn the Climate Control
ON/OFF.
13. Driver Temperature Control Down Button (Uconnect
8.4)
Provides the driver with independent temperature con-
trol. Push the button on the faceplate for cooler tempera-
ture settings or on the touchscreen, press and slide the
temperature bar towards the blue arrow for cooler tem-
perature settings.
NOTE:
In Sync mode, this button will also automatically
adjust the passenger temperature setting at the same
time.
360 UNDERSTANDING YOUR INSTRUMENT PANEL
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14. Driver Temperature Control Up Button (Uconnect
8.4)
Provides the driver with independent temperature con-
trol. Push the button on the faceplate button for warmer
temperature settings or on the touchscreen, press and
slide the temperature bar towards the red arrow for
warmer temperature settings.
NOTE:In Sync mode, this button will also automatically
adjust the passenger temperature setting at the same
time.
15. Temperature Control (Uconnect 5.0)
Press the temperature button on the touchscreen to
regulate the temperature of the air inside the passenger
compartment. Moving the temperature bar into the red
area, indicates warmer temperatures. Moving the tem-
perature bar into the blue area indicates cooler tempera-
tures.Climate Control Functions
A/C (Air Conditioning)
The Air Conditioning (A/C) button allows the operator
to manually activate or deactivate the air conditioning
system. When the air conditioning system is turned on,
cool dehumidified air will flow through the outlets into
the cabin. For improved fuel economy, press the A/C
button to turn off the air conditioning and manually
adjust the blower and airflow mode settings. Also, make
sure to select only Panel, Bi-Level or Floor modes.
NOTE:
• For Manual Climate Controls, if the system is in Mix,
Floor or Defrost Mode, the A/C can be turned off, but
the A/C system shall remain active to prevent fogging
of the windows.
4
UNDERSTANDING YOUR INSTRUMENT PANEL 361
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▫Dual Rear Wheels .....................483
TIRE PRESSURE MONITOR SYSTEM (TPMS) . .484
▫ Base System — If Equipped ..............487
▫ Premium System ..................... .488
▫ Tire Pressure Information System (TPIS) Chassis
Cab — If Equipped ....................492
▫ General Information ....................493
FUEL REQUIREMENTS ..................494
▫ 6.4L Engine ......................... .494
▫ Reformulated Gasoline .................494
▫ Gasoline/Oxygenate Blends ..............495
▫ E-85 Usage In Non-Flex Fuel Vehicles .......495
▫ MMT In Gasoline .....................496 ▫
Materials Added To Fuel ................496
▫ Fuel System Cautions ...................497
▫ Carbon Monoxide Warnings .............498
ADDING FUEL ....................... .498
▫ Loose Fuel Filler Cap Message ............499
VEHICLE LOADING ....................500
▫ Certification Label ....................500
TRAILER TOWING .....................502
▫ Common Towing Definitions .............502
▫ Trailer Hitch Classification ...............507
▫ Trailer Towing Weights
(Maximum Trailer Weight Ratings) .........508
▫ Trailer And Tongue Weight ..............508
396 STARTING AND OPERATING
Page 399 of 669
▫Towing Requirements ..................509
▫ Towing Tips ........................ .517
SNOWPLOW ........................ .519
▫ Before Plowing ...................... .520
▫ Snowplow Prep Package Model Availability . . .520
▫ Over The Road Operation With Snowplow
Attached ........................... .521
▫ Operating Tips ...................... .521▫
General Maintenance ...................522
RECREATIONAL TOWING (BEHIND
MOTORHOME, ETC.) ...................523
▫ Towing This Vehicle Behind Another Vehicle . .523
▫ Recreational Towing — Two-Wheel Drive
Models ............................ .524
▫ Recreational Towing — Four-Wheel Drive
Models ............................ .525
5
STARTING AND OPERATING 397
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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.
• If the vehicle has a discharged battery, booster
cables may be used to obtain a start from a booster
battery or the battery in another vehicle. This type
of start can be dangerous if done improperly. Refer
to “Jump-Starting” in “What To Do In Emergen-
cies” for further information. If the engine has been flooded, it may start to run, but not
have enough power to continue running when the igni-
tion button/key is released. If this occurs, continue
cranking with the accelerator pedal pushed all the way to
the floor. Release the accelerator pedal and the ignition
button/key once the engine is running smoothly.
If the engine shows no sign of starting after a 10 second
period of engine cranking with the accelerator pedal held
to the floor, wait 10 to 15 seconds, then repeat the
“Normal Starting” procedure.
After Starting
The idle speed is automatically controlled and will de-
crease as the engine warms up.
400 STARTING AND OPERATING
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ENGINE BLOCK HEATER — IF EQUIPPED
The engine block heater warms the engine, and permits
quicker starts in cold weather. Connect the cord to a
standard 110-115 Volt AC electrical outlet with a
grounded, three-wire extension cord.
Gasoline Engine Only
The engine block heater cord is routed through the grille
by the right front tow hook.
It includes a removable cap that is secured by a tethered
strap. It also has a c-clip that is used for storage when not
in use for the Winter months. During Winter months,
remove the heater cord wiring assembly from itself on
the c-clip.
The engine block heater must be plugged in at least one
hour to have an adequate warming effect on the engine.
WARNING!
Remember to disconnect the engine block heater
cord before driving. Damage to the 110-115 Volt
electrical cord could cause electrocution.
AUTOMATIC TRANSMISSION
CAUTION!
Damage to the transmission may occur if the follow-
ing precautions are not observed:
•Shift into or out of PARK or REVERSE only after
the vehicle has come to a complete stop.
• Do not shift between PARK, REVERSE, NEU-
TRAL, or DRIVE when the engine is above idle
speed.
• Before shifting into any gear, make sure your foot
is firmly pressing the brake pedal.
5
STARTING AND OPERATING 401
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NOTE:If a malfunction occurs, the system will trap the
Key Fob in the ignition switch to warn you that this
safety feature is inoperable. The engine can be started
and stopped but the Key Fob cannot be removed until
you obtain service.
Brake/Transmission Shift Interlock System
This vehicle is equipped with a Brake Transmission Shift
Interlock system (BTSI) that holds the shift lever in PARK
unless the brakes are applied. To shift the transmission
out of PARK, the ignition must be turned to the ON/
RUN position (engine running or not) and the brake
pedal must be pressed.
Six–Speed Automatic Transmission — If
Equipped
Chassis Cab models (with automatic transmission) may
use either the AS66RC transmission (which is equipped with a Power Take-Off (PTO) access cover on the side of
the transmission case), or the 66RFE transmission (which
has no PTO access cover).
The transmission gear position display (located in the
instrument cluster) indicates the transmission gear range.
The shift lever is mounted on the right side of the steering
column. You must press the brake pedal to move the shift
lever out of PARK (refer to “Brake/Transmission Shift
Interlock System” in this section). To drive, move the shift
lever from PARK or NEUTRAL to the DRIVE position.
Pull the shift lever toward you when shifting into RE-
VERSE or PARK, or when shifting out of PARK.
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).
404 STARTING AND OPERATING
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When parking on a hill, apply the parking brake before
shifting the transmission to PARK, otherwise the load on
the transmission locking mechanism may make it diffi-
cult to move the shift lever out of PARK. As an added
precaution, turn the front wheels toward the curb on a
downhill grade and away from the curb on an uphill
grade.
NOTE:On four-wheel drive vehicles be sure that the
transfer case is in a drive position.
WARNING!
• Never use the PARK position as a substitute for the
parking brake. Always apply the parking brake
fully when parked to guard against vehicle move-
ment and possible injury or damage.
(Continued)
WARNING! (Continued)
•Your vehicle could move and injure you and others
if it is not completely in PARK. Check by trying to
move the shift lever out of PARK with the brake
pedal released. Make sure the transmission is in
PARK before leaving the vehicle.
• It is dangerous to shift out of PARK or NEUTRAL
if the engine speed is higher than idle speed. If
your foot is not firmly pressing the brake pedal, the
vehicle could accelerate quickly forward or in re-
verse. You could lose control of the vehicle and hit
someone or something. Only shift into gear when
the engine is idling normally and your foot is
firmly pressing the brake pedal.
(Continued)
406 STARTING AND OPERATING