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system has been activated or the check-mark is removed
showing the system has been deactivated.
•Flash Lights With Remote Lower
When this feature is selected, the front and rear turn
signals will flash when the RKE transmitter REMOTE
LOWER button is pressed twice. This feature may be
selected with or without the Sound Horn on Lower
feature selected. Touch the box next to your selection and
a check-mark appears next to the feature showing the
system has been activated or the check-mark is removed
showing the system has been deactivated.
• Suspension Display Messages
When All is selected, all the Air Suspension Alerts will be
displayed. When Warnings Only is selected only the Air
Suspension Warnings will be displayed. •
Automatic Aero Mode (1500 Model Only)
When this feature is selected the Ride Height will auto-
matically be adjusted depending on the vehicle speed.
Touch the box next to your selection and a check-mark
appears next to the feature showing the system has been
activated or the check-mark is removed showing the
system has been deactivated.
• Tire Jack Mode
When this feature is selected the air suspension system is
disabled to assist with changing a spare tire. Touch the
box next to your selection and a check-mark appears next
to the feature showing the system has been activated or
the check-mark is removed showing the system has been
deactivated.
• Transport Mode
When this feature is selected the air suspension system is
disabled to assist with flat bed towing. Touch the box
4
UNDERSTANDING YOUR INSTRUMENT PANEL 263
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•Temporary spare tires are designed for temporary
emergency use only. Temporary high pressure com-
pact spare tires have the letter “T” or “S” molded into
the sidewall preceding the size designation.
Example: T145/80D18 103M. •
High flotation tire sizing is based on U.S. design
standards and it begins with the tire diameter molded
into the sidewall. Example: 31x10.5 R15 LT.
Tire Sizing Chart
EXAMPLE:
Size Designation: P= Passenger car tire size based on U.S. design standards
....blank.... = Passenger car tire based on European design standards
LT = Light truck tire based on U.S. design standards
TorS= Temporary spare tire
31 = Overall diameter in inches (in)
215 = Section width in millimeters (mm)
65 = Aspect ratio in percent (%)
— Ratio of section height to section width of tire
10.5 = Section width in inches (in)
5
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Tongue Weight (TW)
The tongue weight is the downward force exerted on the
hitch ball by the trailer. In most cases it should not be less
than 10% of the trailer load. You must consider this as
part of the load on your vehicle.
Frontal Area
The frontal area is the maximum height multiplied by the
maximum width of the front of a trailer.
Trailer Sway Control
The trailer sway control is a telescoping link that can be
installed between the hitch receiver and the trailer tongue
that typically provides adjustable friction associated with
the telescoping motion to dampen any unwanted trailer
swaying motions while traveling.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue
weight, just as if it were luggage located at a hitch ball or
some other connecting point of the truck. These kind of
hitches are the most popular on the market today and
they are commonly used to tow small- and medium-
sized trailers.
Weight-Distributing Hitch
A weight-distributing system works by applying lever-
age through spring (load) bars. They are typically used
for heavier loads to distribute trailer tongue weight to the
tow vehicle’s front axle and the trailer axle(s). When used
in accordance with the manufacturer’s directions, it pro-
vides for a more level ride, offering more consistent
steering and brake control, thereby enhancing towing
safety. The addition of a friction/hydraulic sway control
also dampens sway caused by traffic and crosswinds and
contributes positively to tow vehicle and trailer stability.5
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