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• Entry/Exit Mode – Indicator lamp 3 will be illuminated
when the vehicle is in Entry Exit Mode. Entry/Exit
mode can be requested up to 33 mph (53 km/h). If
vehicle speed is reduced to, and kept below, 15 mph
(24 km/h) indicator lamp 3 will flash and indicator lamp
4 will remain solid until Entry/Exit Mode is achieved at
which point indicator lamp 4 will turn off.
• Transport Mode – No indicator lamps will be illumi-
nated. Transport Mode is disabled by driving the ve-
hicle.
• Tire/Jack Mode – Indicator lamps 3 and 6 will be
illuminated. Tire/Jack Mode is disabled by driving the
vehicle.
• Wheel Alignment Mode – Indicator lamps 3, 4 and 5 will
be illuminated. Wheel Alignment Mode is disabled by
driving the vehicle.
AIR SUSPENSION SYSTEM (2500/3500 MODELS) —
IF EQUIPPED
Description
This air suspension system is a rear leveling ride height
system. The main purpose of this system is to maintain the
truck’s rear ride height level. There are two selectable
heights that can be chosen based on your operating condi-
tions.
The system requires that the ignition be in ON/RUN
position or the engine running with zero vehicle speed for
all user requested changes and load leveling.
Normal Ride Height (NRH) – This is the standard position
of the suspension and is meant for normal driving. It will
automatically adjust to maintain the rear ride height as
conditions change.
Rear Leveling Ride Height Switch
5
STARTING AND OPERATING 439
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